Inspect Flash Rust

How to Inspect Flash RustHow to Inspect Flash RustTraining ManualTraining ManualTraining ManualTraining Manual

Presented to National Shipbuilding Research Program Presented to National Shipbuilding Research Program SPSP--33

September 30, 2008September 30, 2008B L di M F l Ph DB L di M F l Ph DBy Lydia M. Frenzel, Ph.D.By Lydia M. Frenzel, Ph.D.

On behalf ofOn behalf ofProject MembersProject Members

And Pete Judt Todd Pacific ShipyardAnd Pete Judt Todd Pacific ShipyardAnd Pete Judt, Todd Pacific ShipyardAnd Pete Judt, Todd Pacific Shipyard

Since last NSRP meeting in VirginiaSince last NSRP meeting in Virginia Since last NSRP meeting in VirginiaSince last NSRP meeting in Virginia Put together modulesPut together modules Presentation to 12 people at MegarustPresentation to 12 people at Megarust Presentation to 12 people at MegarustPresentation to 12 people at Megarust 4 hours4 hours RewriteRewrite Presentation to NSRP in JohnstownPresentation to NSRP in Johnstown ReRe--writewrite-- reduce, get to cd deliverable by reduce, get to cd deliverable by

December.December.

Project GoalsProject GoalsProject GoalsProject Goals

It takes about 3 hours to get through all ofIt takes about 3 hours to get through all of It takes about 3 hours to get through all of It takes about 3 hours to get through all of the material.the material. In its present form it is more than originallyIn its present form it is more than originally In its present form, it is more than originally In its present form, it is more than originally

promised.promised.–– Reduce the number of examplesReduce the number of examplesReduce the number of examples.Reduce the number of examples.–– Include the optional chapters?Include the optional chapters? (discussion with NASSCO and Cogswell)(discussion with NASSCO and Cogswell)( g )( g )

–– Produce Final electronic version.Produce Final electronic version. Final Deliverable is due in December.Final Deliverable is due in December.

Flash RustFlash RustFlash RustFlash Rust

Flash Rust is the rust that occurs from theFlash Rust is the rust that occurs from the Flash Rust is the rust that occurs from the Flash Rust is the rust that occurs from the time the waterjetting (WJ) process starts to time the waterjetting (WJ) process starts to the time the water used for the waterjettingthe time the water used for the waterjettingthe time the water used for the waterjetting the time the water used for the waterjetting process dries.process dries. Typically, NO rustTypically, NO rust--back is allowed in dryback is allowed in dryTypically, NO rustTypically, NO rust back is allowed in dry back is allowed in dry

blast cleaning, but it is accepted to paint blast cleaning, but it is accepted to paint over “Flash Rust” in waterjetting.over “Flash Rust” in waterjetting. How much “Flash Rust” is formed is directly How much “Flash Rust” is formed is directly

related to time of wetness.related to time of wetness.

Experienced InspectorExperienced Inspectorp pp pNew to WaterjettingNew to Waterjetting

Get NACE No 5 /SSPC SPGet NACE No 5 /SSPC SP--12 and VIS12 and VIS--44Get NACE No. 5 /SSPC SPGet NACE No. 5 /SSPC SP 12 and VIS12 and VIS 44 Compare VISCompare VIS--4 to SSPC VIS4 to SSPC VIS--1 and VIS1 and VIS--33 Read IntroductionRead IntroductionRead IntroductionRead Introduction Read Standard Language. Go out and look.Read Standard Language. Go out and look. Look at Videos for orientation. Compare Look at Videos for orientation. Compare pp

btb_short.mpg with clean blasting.mpg to remind btb_short.mpg with clean blasting.mpg to remind our selves of our public responsibility. (Optional)our selves of our public responsibility. (Optional)G t Ch t Wi i d TG t Ch t Wi i d T Go to Chapters on Wiping and TapeGo to Chapters on Wiping and Tape

Peruse Chapters on Field ExamplesPeruse Chapters on Field Examples

New InspectorNew InspectorppNew to Abrasive Blast and WaterjetNew to Abrasive Blast and Waterjet Get NACE No. 5 /SSPC SPGet NACE No. 5 /SSPC SP--12 and VIS12 and VIS--44 Get one of the NACE or SSPC SP abrasive documentsGet one of the NACE or SSPC SP abrasive documents-- I I

suggest SSPC SPsuggest SSPC SP--10 or SSPC SP10 or SSPC SP--66 Compare VISCompare VIS--4 to SSPC VIS4 to SSPC VIS--1 and VIS1 and VIS--33Compare VISCompare VIS 4 to SSPC VIS4 to SSPC VIS 1 and VIS1 and VIS 33 Read Introduction and Standards. Go out and look.Read Introduction and Standards. Go out and look. Look at Videos for orientation. Compare btb_short.mpg Look at Videos for orientation. Compare btb_short.mpg

with clean blasting mpg to remind our selves of our publicwith clean blasting mpg to remind our selves of our publicwith clean blasting.mpg to remind our selves of our public with clean blasting.mpg to remind our selves of our public responsibility. (Optional)responsibility. (Optional)

Read remaining chapters in sequence.Read remaining chapters in sequence. Get out into the Yard and look around Get a pressureGet out into the Yard and look around Get a pressure Get out into the Yard and look around. Get a pressure Get out into the Yard and look around. Get a pressure

washer or a hose and wet down some steelwasher or a hose and wet down some steel-- horizontal and horizontal and vertical. Try the wipe tests.vertical. Try the wipe tests.

Peruse Chapters on Field ExamplesPeruse Chapters on Field Examples Peruse Chapters on Field ExamplesPeruse Chapters on Field Examples

Chapter 1Chapter 1 IntroductionIntroductionChapter 1Chapter 1 IntroductionIntroduction Chapter 1Chapter 1 IntroductionIntroductionChapter 1Chapter 1 IntroductionIntroduction

–– ObjectiveObjective–– Beginning Definition of flash rustBeginning Definition of flash rust

Common terms for waterjettingCommon terms for waterjetting–– Common terms for waterjettingCommon terms for waterjetting–– Reader BackgroundReader Background–– Limitations of this Training ManualLimitations of this Training Manual–– Use of ManualUse of Manual–– HistoryHistory–– Comparison of Dry and Wet BlastingComparison of Dry and Wet BlastingComparison of Dry and Wet BlastingComparison of Dry and Wet Blasting–– Brief Introduction to Evaluation of Flash RustBrief Introduction to Evaluation of Flash Rust

Subjective versus Objective Evaluation in Dry and Wet BlastingSubjective versus Objective Evaluation in Dry and Wet Blasting

Chapter 2Chapter 2 “Standard” Rust“Standard” RustChapter 2Chapter 2 Standard RustStandard Rust

Chapter 2Chapter 2 Standard LanguageStandard Language Chapter 2Chapter 2 Standard LanguageStandard Language Standard LanguageStandard Language

–– Flash RustFlash RustFlash RustFlash Rust–– Rust BackRust Back–– Rust BloomRust Bloom

St d d D tSt d d D t Standard DocumentsStandard Documents AbrasiveAbrasive WaterJettingWaterJettinggg

Examples of Decision TreesExamples of Decision Trees-- “Can I Paint this “Can I Paint this surface?” (optional)surface?” (optional)

Chapter 3Chapter 3 Standard PhotosStandard PhotosChapter 3Chapter 3 Standard PhotosStandard Photos Chapter 3Chapter 3 Standard PhotosStandard Photospp

–– ISO, SSPC, NACEISO, SSPC, NACE–– Coatings ManufacturerCoatings Manufacturer

International PaintInternational Paint HempelHempel JotunJotun

–– Examples of None, Light, Moderate, and HeavyExamples of None, Light, Moderate, and HeavyIntroduction to Field Methods of EvaluationIntroduction to Field Methods of Evaluation–– Introduction to Field Methods of EvaluationIntroduction to Field Methods of Evaluation

ALL DOCUMENTS CONVERGE ONALL DOCUMENTS CONVERGE ON NoneNone

Li htLi ht LightLight ModerateModerate-- MediumMedium HeavyHeavy-- ConsiderableConsiderableyy

Chapter 4 Use of Guides and Chapter 4 Use of Guides and IlluminationIllumination

Chapter 4 Use of GuidesChapter 4 Use of Guides Chapter 4 Use of Guides Chapter 4 Use of Guides All Guides are used the same.All Guides are used the same. All guides lead to same answerAll guides lead to same answer All guides lead to same answer.All guides lead to same answer.

–– Distance from SteelDistance from Steel–– Select initial conditionSelect initial conditionSelect initial conditionSelect initial condition–– Evaluate Cleanliness before flash rust formsEvaluate Cleanliness before flash rust forms–– Evaluate Flash Rust before coatingEvaluate Flash Rust before coatinggg–– Mitigate Flash Rust, if necessaryMitigate Flash Rust, if necessary

IlluminationIllumination

Chapter 5Chapter 5-- Field Experience VideosField Experience VideosChapter 5Chapter 5 Field Experience VideosField Experience Videos

Cleaning with closed loopCleaning with closed loop-- vacuumvacuum Cleaning with closed loopCleaning with closed loop-- vacuumvacuum Cleaning with hand gunCleaning with hand gun-- no vacuumno vacuum Cleaning with hand gunCleaning with hand gun defect placingdefect placing Cleaning with hand gunCleaning with hand gun-- defect placing defect placing

more water on surface and leading to heavy more water on surface and leading to heavy flash rustflash rustflash rustflash rust Field ExperiencesField Experiences

Water BreakWater Break-- Oil and GreaseOil and Grease Water BreakWater Break-- Oil and GreaseOil and Grease Hand Held without Vacuum Vs. Robotic with VacuumHand Held without Vacuum Vs. Robotic with Vacuum Flash Rust from Different MethodsFlash Rust from Different Methods

Chapter 6Chapter 6-- Field EvaluationField EvaluationWiping with ClothWiping with Cloth

Wipe with HandWipe with HandWipe with HandWipe with Hand Wipe with ClothWipe with Cloth

–– HandHand–– SwatchSwatch–– BrushBrush

l f h dl f h d Examples of Light, Moderate, HeavyExamples of Light, Moderate, Heavy Comparison ExamplesComparison Examples

P W h t d M d t H tP W h t d M d t H t Pressure Wash to reduce Moderate or Heavy to Pressure Wash to reduce Moderate or Heavy to LightLight

Be consistent in materials and methodologyBe consistent in materials and methodology Be consistent in materials and methodologyBe consistent in materials and methodology

Chapter 7Chapter 7-- Field EvaluationField EvaluationPressure Sensitive TapePressure Sensitive Tape

Hempel Defined test for Quantitative EvaluationHempel Defined test for Quantitative Evaluation–– ISO 8502ISO 8502--3 Assessment of Dust with Tape3 Assessment of Dust with Tapepp–– Hempel DescriptionHempel Description–– Standard Hempel PhotosStandard Hempel Photos

D d C St lD d C St l D and C SteelD and C Steel–– Moderate, Heavy RustModerate, Heavy Rust-- Field BargeField Barge–– No flash rustNo flash rust-- Field BargeField Bargegg

Scanned fullScanned full--size copies of Tape pages are size copies of Tape pages are included in pdf notes.included in pdf notes.

Chapter 8 SummaryChapter 8 SummaryChapter 8 SummaryChapter 8 Summary

Chapter 8 SummaryChapter 8 Summary Chapter 8 SummaryChapter 8 Summary StandardsStandards GuidesGuides Illustrations of Light, Moderate, HeavyIllustrations of Light, Moderate, Heavyg , , yg , , y

Optional ChaptersOptional ChaptersOptional ChaptersOptional Chapters Chapter Field Experience (optional) Todd Pacific InChapter Field Experience (optional) Todd Pacific In--House TrainingHouse Trainingp p ( p )p p ( p ) gg

–– How Todd Pacific Shipyard does inHow Todd Pacific Shipyard does in--house traininghouse training Standards of CleanlinessStandards of Cleanliness VISVIS--44 Definition of “Obscure”Definition of “Obscure” Light, Moderate, HeavyLight, Moderate, Heavy Microscopic ViewsMicroscopic Views Brush Wipe ProcedureBrush Wipe Procedure

Chapter Field Experience (optional)Chapter Field Experience (optional)-- Control and Mitigation of Flash Control and Mitigation of Flash Rust ( Cogswell and Ault felt this was most important)Rust ( Cogswell and Ault felt this was most important)

Chapter Field Experience (optional)Chapter Field Experience (optional)-- Use of Digital Camera for Use of Digital Camera for evaluationevaluationevaluationevaluation

Chapter Field Experience (optional)Chapter Field Experience (optional)-- series of formation of flash rust series of formation of flash rust with time stamp on themwith time stamp on them-- use the area of light moderate, heavy flash use the area of light moderate, heavy flash rust on bargerust on barge

Published Papers (Optional)Published Papers (Optional)Published Papers (Optional)Published Papers (Optional) There are many published papers. These papers deal with “Flash Rust.” There are many published papers. These papers deal with “Flash Rust.”

d i l d d i th l t i fild i l d d i th l t i filand are included in the electronic file.and are included in the electronic file.

Gilbert, Doug, New Hydroblasting and Slurryblasting Standards Issued, Gilbert, Doug, New Hydroblasting and Slurryblasting Standards Issued, JPCL, Jan., 1995, p. 64JPCL, Jan., 1995, p. 64--69 69 This article is the basis for International Paint’s This article is the basis for International Paint’s ii h t i i f th i t h i l t tih t i i f th i t h i l t tiinin--house training for their technical representatives.house training for their technical representatives.

Kelly, John, There's More than One Kind Of Rust, Marine Log, May, 1996, Kelly, John, There's More than One Kind Of Rust, Marine Log, May, 1996, p. 18p. 18

Swearingen, Mark, UHP Water Jetting Offers Advantages, Marine Log, Swearingen, Mark, UHP Water Jetting Offers Advantages, Marine Log, May, 1996, p. 20May, 1996, p. 20

Tanner, John, Flash Rust, A Primer, CleanerTimes, April, 2001, p. 20,22,23Tanner, John, Flash Rust, A Primer, CleanerTimes, April, 2001, p. 20,22,23 Frenzel, Lydia, Flash Rust: Color, CleanerTimes, May 2001, p. 26 & 27Frenzel, Lydia, Flash Rust: Color, CleanerTimes, May 2001, p. 26 & 27 Frenzel, Lydia, Flash Rust: Amount, CleanerTimes, June 2001, p.32 & 33Frenzel, Lydia, Flash Rust: Amount, CleanerTimes, June 2001, p.32 & 33Frenzel, Lydia, Flash Rust: Amount, CleanerTimes, June 2001, p.32 & 33Frenzel, Lydia, Flash Rust: Amount, CleanerTimes, June 2001, p.32 & 33 Frenzel, Lydia, Remote Waterjetting Offers Inconspicuous Coatings Frenzel, Lydia, Remote Waterjetting Offers Inconspicuous Coatings

removal on LNG tank, JPCL, Dec., 2002, p. 57removal on LNG tank, JPCL, Dec., 2002, p. 57--6565 Frenzel, Lydia M, Flash Rust, CleanerTimes, Sept, 2004 p 24Frenzel, Lydia M, Flash Rust, CleanerTimes, Sept, 2004 p 24--2727

Contact InformationContact InformationContact InformationContact Information

Lydia Frenzel, Ph.D.Lydia Frenzel, Ph.D. [email protected]@advisorycouncil.org TelTel--Fax:+1 800Fax:+1 800--308308--74167416 Tel: +1 512Tel: +1 512--392392--22102210

OnOn Site training is availableSite training is available OnOn--Site training is available.Site training is available.

How to Inspect Flash RustHow to Inspect Flash Rusth t 01 I t d tih t 01 I t d tichapter 01 Introductionchapter 01 Introduction

Training ManualTraining ManualNational Shipbuilding ResearchNational Shipbuilding ResearchNational Shipbuilding Research National Shipbuilding Research

Program 2008Program 2008

Flash RustFlash RustFlash RustFlash Rust

Flash Rust is the rust that occurs from theFlash Rust is the rust that occurs from the Flash Rust is the rust that occurs from the Flash Rust is the rust that occurs from the time the waterjetting (WJ) process starts to time the waterjetting (WJ) process starts to the time the water used for the waterjettingthe time the water used for the waterjettingthe time the water used for the waterjetting the time the water used for the waterjetting process dries.process dries. Typically, NO rustTypically, NO rust--back is allowed in dryback is allowed in dryTypically, NO rustTypically, NO rust back is allowed in dry back is allowed in dry

blast cleaning, but it is accepted to paint blast cleaning, but it is accepted to paint over “Flash Rust” in waterjetting.over “Flash Rust” in waterjetting. How much “Flash Rust” is formed is directly How much “Flash Rust” is formed is directly

related to time of wetness.related to time of wetness.

Common TermsCommon TermsCommon TermsCommon Terms

water jetting or waterjettingwater jetting or waterjetting water jetting, or waterjettingwater jetting, or waterjetting water blast cleaning, or water blastingwater blast cleaning, or water blasting hydrojetting, or hydroblastinghydrojetting, or hydroblasting aquajetting, or aquablasting, aquajetting, or aquablasting, q j g, q g,q j g, q g, and “cleaning by directing a jet of and “cleaning by directing a jet of

pressurized water onto the surface to bepressurized water onto the surface to bepressurized water onto the surface to be pressurized water onto the surface to be cleaned.”cleaned.”

Background of ReaderBackground of ReaderBackground of ReaderBackground of Reader

InspectorsInspectors InspectorsInspectors Have attended NACE or SSPC Certified Inspector Have attended NACE or SSPC Certified Inspector

CoursesCoursesCoursesCourses Familiar with “Standard” photos and languageFamiliar with “Standard” photos and language Might not be as familiar withMight not be as familiar with Water Jetting (WJ)Water Jetting (WJ) Might not be as familiar with Might not be as familiar with Water Jetting (WJ), Water Jetting (WJ),

Wet Abrasive Blasting (WAB) Wet Abrasive Blasting (WAB) as compared as compared toto Dry Abrasive Blasting (AB)Dry Abrasive Blasting (AB)toto Dry Abrasive Blasting (AB).Dry Abrasive Blasting (AB).

What this Manual “IS NOT”What this Manual “IS NOT”What this Manual IS NOTWhat this Manual IS NOT

This is not a comprehensive InspectionThis is not a comprehensive Inspection This is not a comprehensive Inspection This is not a comprehensive Inspection Manual. Many factors in addition to Flash Manual. Many factors in addition to Flash RustRustRustRust The manual does not address in detailThe manual does not address in detail

–– Visual Cleanliness (ie SSPC SPVisual Cleanliness (ie SSPC SP--5 SSPC SP5 SSPC SP--Visual Cleanliness (ie SSPC SPVisual Cleanliness (ie SSPC SP 5, SSPC SP5, SSPC SP10, ISO 3, ISO 2 ½, WJ10, ISO 3, ISO 2 ½, WJ--1, WJ1, WJ--2)2)

–– Profile RequirementsProfile Requirements–– Oil and GreaseOil and Grease–– NonNon--Visible ContaminantsVisible Contaminants

How To Use This ManualHow To Use This ManualHow To Use This ManualHow To Use This Manual Make use of What you knowMake use of What you knowMake use of What you know.Make use of What you know. Go to sections that make sense.Go to sections that make sense. Have on handHave on hand-- one of the written Standardsone of the written StandardsHave on handHave on hand one of the written Standardsone of the written Standards Have on handHave on hand-- one or more of the Visual Guidesone or more of the Visual Guides All standards and Guides lead to the Same All standards and Guides lead to the Same

Definitions.Definitions. Concentrate on Areas that you are inConcentrate on Areas that you are in--experienced experienced

ithithwith.with. Inspection of “Flash Rust” is deceptively simple.Inspection of “Flash Rust” is deceptively simple.

How To Use This Manual (cont)How To Use This Manual (cont)How To Use This Manual (cont)How To Use This Manual (cont)

Read a little!Read a little! Read a little!Read a little! Go out in the field and look at Rust BloomGo out in the field and look at Rust Bloom Have a Visual Guide in HandHave a Visual Guide in Hand Try the physical measurementsTry the physical measurementsy p yy p y Be Consistent !Be Consistent ! Think a lot!Think a lot! Think a lot!Think a lot!

History of WaterJetting and Wet History of WaterJetting and Wet Abrasive BlastingAbrasive Blasting

1940’s strip slag from steel Wet abrasive blasting1940’s strip slag from steel Wet abrasive blasting 1940 s strip slag from steel, Wet abrasive blasting1940 s strip slag from steel, Wet abrasive blasting Go From CLEANING TO REMOVALGo From CLEANING TO REMOVAL 1980’s start removal of coatings1980’s start removal of coatings surfacesurface 1980 s start removal of coatings1980 s start removal of coatings-- surface surface

preparationpreparation 19851985 SSPC starts standards on WAB and WJSSPC starts standards on WAB and WJ 19851985-- SSPC starts standards on WAB and WJSSPC starts standards on WAB and WJ 19941994-- US Navy introduces UHP WJ robotic control US Navy introduces UHP WJ robotic control

and “closed” loop with vacuumand “closed” loop with vacuumand closed loop with vacuumand closed loop with vacuum International Paint issues photographsInternational Paint issues photographs--

Abrasive Cleaning and Pressurized Abrasive Cleaning and Pressurized Water Cleaning are DIFFERENT!Water Cleaning are DIFFERENT!

Dry or Wet AbrasiveDry or Wet Abrasive WaterJetWaterJetDry or Wet Abrasive Dry or Wet Abrasive WaterJetWaterJet New and RepairNew and Repair RepairRepair Makes new profileMakes new profile Exposes profileExposes profileMakes new profileMakes new profile Exposes profile Exposes profile

under paint or corrosionunder paint or corrosion Erases from the TopErases from the Top Shears at interfaceShears at interface Looks UniformLooks Uniform Exposes all problemsExposes all problems Cleans top, leaveCleans top, leave Gets into crevices, Gets into crevices,

crevices alonecrevices alone can leave top materialcan leave top material NO Rust AllowedNO Rust Allowed Flash Rust allowedFlash Rust allowed

Surface PreparationSurface PreparationSurface PreparationSurface Preparation

Even though Abrasive cleaning andEven though Abrasive cleaning and Even though, Abrasive cleaning and Even though, Abrasive cleaning and Pressurized Water Cleaning are different, Pressurized Water Cleaning are different, the Objective is the SAMEthe Objective is the SAMEthe Objective is the SAMEthe Objective is the SAME--

Create a Situation so that the Create a Situation so that the Coatings Will Perform as Coatings Will Perform as

ExpectedExpectedExpected.Expected.

Why Bother with WaterJetting and Why Bother with WaterJetting and “Flash Rust”“Flash Rust”

Waterjet Cleaning is typically used onWaterjet Cleaning is typically used on Waterjet Cleaning is typically used on Waterjet Cleaning is typically used on heavily contaminated steel, or in areas heavily contaminated steel, or in areas where rubber linings barnacles or heavywhere rubber linings barnacles or heavywhere rubber linings, barnacles, or heavy where rubber linings, barnacles, or heavy rust is to be removed.rust is to be removed.C ti ti htl dh t th fC ti ti htl dh t th f Coatings tightly adhere to the surfaceCoatings tightly adhere to the surface and their performance is equal to, or better, and their performance is equal to, or better,

than dry blast cleaning.than dry blast cleaning.

How to Inspect Flash RustHow to Inspect Flash RustCh t 2Ch t 2 St d dSt d dChapter 2Chapter 2-- StandardsStandards



ApproachApproachApproachApproach

The Biggest Key is to understand:The Biggest Key is to understand: The Biggest Key is to understand:The Biggest Key is to understand: Waterjet is done in repair or maintenance.Waterjet is done in repair or maintenance. “What you do to the Surface Initially will“What you do to the Surface Initially will “What you do to the Surface Initially will “What you do to the Surface Initially will

influence the performance through the rest influence the performance through the rest of the structures life ”of the structures life ”of the structures life.of the structures life.

Think ProcessThink Process Management SystemsManagement Systemsg yg y Human FailingHuman Failing WeatherWeather

Standard LanguageStandard LanguageStandard LanguageStandard Language

Standard DefinitionsStandard Definitions–– Flash RustFlash Rust–– Rust BackRust Back

–– Rust BloomRust Bloom

Three Basic “terms” of rust found in Three Basic “terms” of rust found in standardsstandards

Flash RustFlash Rust is an oxidation of the steel that occursis an oxidation of the steel that occurs as wetted carbonas wetted carbon Flash Rust Flash Rust is an oxidation of the steel that occurs is an oxidation of the steel that occurs as wetted carbon as wetted carbon steel driessteel dries OR rusting that occurs when a thin coat of waterborne paint is OR rusting that occurs when a thin coat of waterborne paint is applied over blast cleaned steel. Often looks like rust bloom.applied over blast cleaned steel. Often looks like rust bloom.

R tR t B k ( ti )B k ( ti ) RustRust--Back (rerusting) Back (rerusting) is rusting that occurs when freshly exposed, is rusting that occurs when freshly exposed, dry,dry, bare steel is exposed to conditions of high humidity, moisture, or a bare steel is exposed to conditions of high humidity, moisture, or a corrosive atmosphere. It is the term used when steel cleaned by dry abrasive corrosive atmosphere. It is the term used when steel cleaned by dry abrasive blasting power tools or wet abrasive blasting begins to rustblasting power tools or wet abrasive blasting begins to rust after the steelafter the steelblasting, power tools, or wet abrasive blasting begins to rust blasting, power tools, or wet abrasive blasting begins to rust after the steel after the steel surface has completely dried.surface has completely dried.

Rust Bloom Rust Bloom is somewhat uniform rust spread evenly over a large is somewhat uniform rust spread evenly over a large ti f th fti f th fsection of the surface.section of the surface.

Long term corrosion is not flash rusting.Long term corrosion is not flash rusting.

Standard DocumentsStandard DocumentsWaterJet CleaningWaterJet Cleaning WaterJet CleaningWaterJet Cleaning WaterJet CleaningWaterJet Cleaning

–– NACE No. 5 or SSPC SPNACE No. 5 or SSPC SP--1212–– Surface Preparation and Cleaning of Metals by WaterjetSurface Preparation and Cleaning of Metals by WaterjetSurface Preparation and Cleaning of Metals by Waterjet Surface Preparation and Cleaning of Metals by Waterjet

–– SSPCSSPC--VIS No. 4 NACE VIS 7 VIS No. 4 NACE VIS 7 –– Guide and Reference Photographs for Steel Surfaces Guide and Reference Photographs for Steel Surfaces

Prepared by WaterjettingPrepared by Waterjetting–– ISO 8501ISO 8501--44

I iti l S f C diti ti d d fl hI iti l S f C diti ti d d fl h–– Initial Surface Conditions, preparation grades and flash Initial Surface Conditions, preparation grades and flash rust grades in connection with highrust grades in connection with high--pressure water pressure water jettingjetting

Waterjetting or HydroblastingWaterjetting or HydroblastingWaterjetting or HydroblastingWaterjetting or Hydroblasting

Shipyards and contractors utilize pressureShipyards and contractors utilize pressure Shipyards and contractors utilize pressure Shipyards and contractors utilize pressure washers for cleaning.washers for cleaning.

Shipyards and contractors use both high pressureShipyards and contractors use both high pressureShipyards and contractors use both high pressure Shipyards and contractors use both high pressure and ultra high pressure waterjetting for surface and ultra high pressure waterjetting for surface preparation and stripping coatings or liners.preparation and stripping coatings or liners.p p pp g gp p pp g g

Waterjetting does not produce a profile; it exposes Waterjetting does not produce a profile; it exposes an existing profile.an existing profile.

Waterjet blasted surfaces look very different from Waterjet blasted surfaces look very different from abrasive blasted surfaces.abrasive blasted surfaces.

Waterjet Blast Doesn’t Look Like Dry Blast.Waterjet Blast Doesn’t Look Like Dry Blast.3 examples of Commercial or Thorough Cleaning3 examples of Commercial or Thorough Cleaning3 examples of Commercial or Thorough Cleaning 3 examples of Commercial or Thorough Cleaning

Standard Photos.Standard Photos.

SSPCSSPCNACENACENACENACED SPD SP--66DryDry

ISO D Sa 2ISO D Sa 2DryDry

SSPC/NACE D WJSSPC/NACE D WJ 33SSPC/NACE D WJSSPC/NACE D WJ--33WJWJ

Combination of Flash Rust and Combination of Flash Rust and RustRust--BackBack

If the substrate is cleaned with water andIf the substrate is cleaned with water and If the substrate is cleaned with water and If the substrate is cleaned with water and then allowed to sit for several hours or days,then allowed to sit for several hours or days,

Y ill lik l h bi ti f “Fl hY ill lik l h bi ti f “Fl hYou will likely have a combination of “Flash You will likely have a combination of “Flash Rust” which occurs as the water is drying Rust” which occurs as the water is drying

d “R td “R t B k” hi h i dB k” hi h i dand “Rustand “Rust--Back” which occurs over a period Back” which occurs over a period of days. of days.

This is what people mean when they say “The This is what people mean when they say “The surface keeps changing from daysurface keeps changing from day--toto--day.”day.”

Examples of Rust BloomExamples of Rust BloomExamples of Rust BloomExamples of Rust Bloom

WJWJ-- hand heldhand held WJWJ-- Days LaterDays Later

Dry Abrasive BlastDry Abrasive Blast WJWJ-- hand heldhand held

RustRust--BackBackRustRust--BackBack

Dry BlastDry Blast If rust is visible before paintingIf rust is visible before painting Dry BlastDry Blast-- If rust is visible before painting If rust is visible before painting (i.e., rust back), the surface must be re(i.e., rust back), the surface must be re--cleaned to meet contract cleaningcleaned to meet contract cleaningcleaned to meet contract cleaning cleaned to meet contract cleaning requirements requirements

D Ab i Bl tD Ab i Bl tDry Abrasive BlastDry Abrasive Blast

Keel block area of manual paint removalKeel block area of manual paint removalpp

Rust BloomRust BloomFlash RustFlash Rust

Manual cut in area around keel blocks

Fast RustFast Rust--BackBackNot Flash Rust Not Rust BloomNot Flash Rust Not Rust Bloom

Test PanelsTest Panels--SSSalt ExposureSalt Exposure

Rail Car SideRail Car SideBlack Localized Black Localized CellsCells

Flow Diagrams in HandoutFlow Diagrams in HandoutFlow Diagrams in HandoutFlow Diagrams in Handout

IS It Flash Rust or Rust Back?IS It Flash Rust or Rust Back? IS It Flash Rust or Rust Back?IS It Flash Rust or Rust Back? Is it Rust Bloom?Is it Rust Bloom? What is the sequence in Dry Blast Clean if What is the sequence in Dry Blast Clean if

rust occurs after initial surface preparation?rust occurs after initial surface preparation? What is the sequence in Waterjet Clean if What is the sequence in Waterjet Clean if

rust occurs after initial surface preparation?rust occurs after initial surface preparation?p pp p

Very Important Summary NoteVery Important Summary Note Flash Rust is the rust that occurs from the timeFlash Rust is the rust that occurs from the time Flash Rust is the rust that occurs from the time Flash Rust is the rust that occurs from the time

the waterjetting process starts to the time the the waterjetting process starts to the time the water used for the waterjetting process dries.water used for the waterjetting process dries.

Rust Back is rust that occurs as a reaction of the Rust Back is rust that occurs as a reaction of the (bare) ferrous substrate with the atmosphere, (bare) ferrous substrate with the atmosphere, especially relative humidity or rain.especially relative humidity or rain.espec a y e at e u d ty o aespec a y e at e u d ty o a

If you finish waterjetting a surface, the time to If you finish waterjetting a surface, the time to l t fl h t i j t ft th f d il t fl h t i j t ft th f d ievaluate flash rust is just after the surface driesevaluate flash rust is just after the surface dries

If you wait a period of time such as overnight orIf you wait a period of time such as overnight orIf you wait a period of time, such as overnight or If you wait a period of time, such as overnight or a day later, continuing rust is not Flash Rust and a day later, continuing rust is not Flash Rust and you’ve just complicated the issue to the point of you’ve just complicated the issue to the point of large potential that your surface will not be inlarge potential that your surface will not be inlarge potential that your surface will not be in large potential that your surface will not be in compliance with the L standard.compliance with the L standard.

How to Inspect Flash RustHow to Inspect Flash RustCh t 3 St d d Ph tCh t 3 St d d Ph tChapter 3 Standard PhotosChapter 3 Standard Photos



ALL OF THESE DESCRIPTIONS ALL OF THESE DESCRIPTIONS CONVERGE on NO FLASH RUSTCONVERGE on NO FLASH RUSTCONVERGE on NO FLASH RUST CONVERGE on NO FLASH RUST and THREE LEVELS OF FLASH and THREE LEVELS OF FLASH

RUST.RUST.ALL of the VISUAL GUIDES areALL of the VISUAL GUIDES areALL of the VISUAL GUIDES are ALL of the VISUAL GUIDES are

used in the SAME WAY! used in the SAME WAY!

Field Examples of “Flash Rust”Field Examples of “Flash Rust”Field Examples of Flash RustField Examples of Flash Rust

SSPCSSPC--NACENACE ISOISO–– LightLight LightLight–– ModerateModerate MediumMedium–– HeavyHeavy HeavyHeavy

No flash rustNo flash rustNo flash rustNo flash rust

A steel surface which when viewed withoutA steel surface which when viewed without A steel surface which, when viewed without A steel surface which, when viewed without magnification, exhibits no visible flash rust.magnification, exhibits no visible flash rust.

Light Flash Rust L (FRLight Flash Rust L (FR--1)1)Light Flash Rust L (FRLight Flash Rust L (FR--1)1)

When viewed without magnification small When viewed without magnification, small quantities of light tan-brown rust will partially discolour the original metallic surface Thisdiscolour the original metallic surface. This discoloration may be evenly distributed, or in patches but it will be tightly adherent andpatches, but it will be tightly adherent and will not be heavy enough to easily mark objects brushed against itobjects brushed against it. International Paint (1994)International Paint (1994)

Light Flash RustLight Flash RustLight Flash RustLight Flash Rust

CC DDWJ 3 L or Wa 2 LWJ 3 L or Wa 2 L

DDWJ 3 L or Wa 2 LWJ 3 L or Wa 2 L

Crater or Pits are the light areas.Crater or Pits are the light areas.

How to Inspect Flash RustHow to Inspect Flash RustChapter 4 USE of GuidesChapter 4 USE of GuidesChapter 4 USE of GuidesChapter 4 USE of Guides

IlluminationIlluminationTraining ManualTraining Manual

National Shipbuilding ResearchNational Shipbuilding ResearchNational Shipbuilding Research National Shipbuilding Research Program 2008Program 2008

Very Important NoteVery Important Note Flash Rust is the rust that occurs from the timeFlash Rust is the rust that occurs from the time Flash Rust is the rust that occurs from the time Flash Rust is the rust that occurs from the time

the waterjetting process starts to the time the the waterjetting process starts to the time the water used for the waterjetting process dries.water used for the waterjetting process dries.

Rust Back is rust that occurs as a reaction of the Rust Back is rust that occurs as a reaction of the (bare) ferrous substrate with the atmosphere, (bare) ferrous substrate with the atmosphere, especially relative humidity or rain.especially relative humidity or rain.espec a y e at e u d ty o aespec a y e at e u d ty o a

If you finish waterjetting a surface, the time to If you finish waterjetting a surface, the time to l t fl h t i j t ft th f d il t fl h t i j t ft th f d ievaluate flash rust is just after the surface driesevaluate flash rust is just after the surface dries

If you wait a period of time such as overnight orIf you wait a period of time such as overnight orIf you wait a period of time, such as overnight or If you wait a period of time, such as overnight or a day later, continuing rust is not Flash Rust and a day later, continuing rust is not Flash Rust and you’ve just complicated the issue to the point of you’ve just complicated the issue to the point of large potential that your surface will not be inlarge potential that your surface will not be inlarge potential that your surface will not be in large potential that your surface will not be in compliance with the L standard.compliance with the L standard.

Very Important NoteVery Important NoteVery Important NoteVery Important Note

Illumination is a very important factor inIllumination is a very important factor in Illumination is a very important factor in Illumination is a very important factor in making any quantitative evaluation. Low making any quantitative evaluation. Low light conditions will prevent your ability tolight conditions will prevent your ability tolight conditions will prevent your ability to light conditions will prevent your ability to see…..and the chore is to determine if you see…..and the chore is to determine if you can see clean steel through and along with can see clean steel through and along with the flash rust.the flash rust. The point here is to observe and determine The point here is to observe and determine

if the steel substrate is or is NOT obscured if the steel substrate is or is NOT obscured by the quantity of flash rust.by the quantity of flash rust.

How to Use the Visual GuidesHow to Use the Visual GuidesHow to Use the Visual GuidesHow to Use the Visual Guides

All of the visual Guides are used in theAll of the visual Guides are used in the All of the visual Guides are used in the All of the visual Guides are used in the same manner is the visual guides for dry same manner is the visual guides for dry abrasive blasting.abrasive blasting.abrasive blasting.abrasive blasting. Determine the initial condition of the steel Determine the initial condition of the steel

before the flash rust forms.before the flash rust forms.before the flash rust forms.before the flash rust forms. Initial condition is illustrated as painted or Initial condition is illustrated as painted or

unpainted steel.unpainted steel.unpainted steel.unpainted steel. Select a photograph that is similar to the Select a photograph that is similar to the

initial condition (Grade C or Grade D)initial condition (Grade C or Grade D)t a co d t o (G ade C o G ade )t a co d t o (G ade C o G ade )

Use of Guides (cont)Use of Guides (cont)Use of Guides (cont)Use of Guides (cont)

Immediately after the cleaning before theImmediately after the cleaning before the Immediately after the cleaning, before the Immediately after the cleaning, before the surface has flash rusted, (it might still be surface has flash rusted, (it might still be wet) evaluate the degree of Visualwet) evaluate the degree of Visualwet), evaluate the degree of Visual wet), evaluate the degree of Visual Cleaning.Cleaning.


Prior to painting compare the flashPrior to painting compare the flash rustedrusted Prior to painting, compare the flashPrior to painting, compare the flash--rusted rusted surface with the flash rust photographs.surface with the flash rust photographs.Wi t f th d t i tiWi t f th d t i ti Wipe or use tape as a further determination.Wipe or use tape as a further determination. Prior to painting, the degree of flash rust Prior to painting, the degree of flash rust

must be in accordance with the contract must be in accordance with the contract specifications.specifications.

Distance from the surface will affect Distance from the surface will affect judgment.judgment.

If you’re to far away you won’t be able to seeIf you’re to far away you won’t be able to see If you re to far away, you won t be able to see If you re to far away, you won t be able to see through the flash rust in order to determine the through the flash rust in order to determine the difference between “steel substrate may be difference between “steel substrate may be yyobserved” [Light flash rust] and “obscures the observed” [Light flash rust] and “obscures the original steel surface” [Medium flash rust]. Heavy original steel surface” [Medium flash rust]. Heavy flash rust simply “hides the initial surface condition flash rust simply “hides the initial surface condition completely” and the determination of Heavy is not completely” and the determination of Heavy is not as critical due to rarity that Heavy flash rust is anas critical due to rarity that Heavy flash rust is anas critical due to rarity that Heavy flash rust is an as critical due to rarity that Heavy flash rust is an acceptable condition for coating. acceptable condition for coating.

Very Important NoteVery Important NoteVery Important NoteVery Important Note

For the purposes of this training andFor the purposes of this training and For the purposes of this training, and For the purposes of this training, and consistent quality, the consistent quality, the Todd Pacific Todd Pacific standard standard default rule is:default rule is: To properly evaluate andTo properly evaluate anddefault rule is: default rule is: To properly evaluate and To properly evaluate and inspect waterjetted surfaces with flash rust, inspect waterjetted surfaces with flash rust, the Inspector will be within touching [bythe Inspector will be within touching [bythe Inspector will be within touching [by the Inspector will be within touching [by hand] distance and no more than an arm’s hand] distance and no more than an arm’s reach from the surface being evaluated; thereach from the surface being evaluated; thereach from the surface being evaluated; the reach from the surface being evaluated; the same as the coating’s applicator.same as the coating’s applicator.

Determine the Condition of SteelDetermine the Condition of Steel

D d d C tiD d d C tiDegraded CoatingDegraded Coating

WJWJ--1 WJ1 WJ--22WJWJ--1, WJ1, WJ--22

The initial conditionThe initial conditionof the steel of the steel is a mix of D and Cis a mix of D and C


Immediately after the cleaning before theImmediately after the cleaning before the Immediately after the cleaning, before the Immediately after the cleaning, before the surface has flash rusted, (it might still be surface has flash rusted, (it might still be wet) evaluate the degree of Visualwet) evaluate the degree of Visualwet), evaluate the degree of Visual wet), evaluate the degree of Visual Cleaning.Cleaning.P i t i ti th d f fl h tP i t i ti th d f fl h t Prior to painting, the degree of flash rust Prior to painting, the degree of flash rust must be in accordance with the contract must be in accordance with the contract

ifi tiifi tispecifications.specifications.

WJWJ--33Moderate Flash RustModerate Flash RustModerate Flash RustModerate Flash Rust

InitialInitial 22--3 Days Later3 Days Later-- just before paintingjust before painting

IlluminationIlluminationIlluminationIllumination

Reference DocumentReference DocumentSSPC Guide 12SSPC Guide 12

G id f Ill i ti f I d t i lGuide for Illumination of Industrial Painting Projects

Grade D Light Almost Grade D Light Almost Perpendicular to surfacePerpendicular to surface

Ob i t h di dOb i t h di dObvious upper contour has disappearedObvious upper contour has disappeared

Light Light SourceSource

Grade D Light from Top to Grade D Light from Top to Bottom at 30 Degree AngleBottom at 30 Degree Angle

Light Light SourceSourceSourceSource

SummarySummarySummarySummary

Illumination MAKES A DIFFERENCE INIllumination MAKES A DIFFERENCE IN Illumination MAKES A DIFFERENCE IN Illumination MAKES A DIFFERENCE IN WHAT THE EYE WILL SEEWHAT THE EYE WILL SEEN t th l f th li htN t th l f th li ht Note the color of the lightNote the color of the light Note the intensity of the lightNote the intensity of the light Note the shadowsNote the shadows Note the angle of the lightNote the angle of the lightNote the angle of the lightNote the angle of the light

How to Inspect Flash RustHow to Inspect Flash RustCh t 5Ch t 5 VidVidChapter 5Chapter 5-- VideosVideos



Time of Wetness is Critical in Time of Wetness is Critical in formation of Flash Rustformation of Flash Rust

Hand Held Head with capture of the water withHand Held Head with capture of the water withHand Held Head with capture of the water with Hand Held Head with capture of the water with vacuum.vacuum.

Two videos show hand held lance without vacuumTwo videos show hand held lance without vacuum No SoundNo Sound--

–– Focus on Ease of UseFocus on Ease of Use–– Cleanliness of SubstrateCleanliness of Substrate–– Movement of WaterMovement of Water–– Formation of Flash RustFormation of Flash Rust–– Formation of Flash RustFormation of Flash Rust

Look at the Water coming out of the defect and Look at the Water coming out of the defect and how it affects the substrate.how it affects the substrate.

WaterJet ProcessesWaterJet ProcessesWaterJet ProcessesWaterJet Processes

OPEN LOOP Without VacuumOPEN LOOP Without Vacuum OPEN LOOP Without VacuumOPEN LOOP Without Vacuum–– Typical Hand Lance Jetting SystemsTypical Hand Lance Jetting Systems

CLOSED LOOP With VCLOSED LOOP With V CLOSED LOOP With VacuumCLOSED LOOP With Vacuum–– Larger Robotic Jetting Systems Larger Robotic Jetting Systems Cleaning on sides of ships, tanks, rail cars, large flat Cleaning on sides of ships, tanks, rail cars, large flat

surfacessurfacesSmaller handSmaller hand held systemsheld systems–– Smaller handSmaller hand--held systemsheld systems Complex structuresComplex structures

Video of System with VacuumVideo of System with VacuumVideo of System with VacuumVideo of System with Vacuum

Look at Clean Blasting mpgLook at Clean Blasting mpg Look at Clean Blasting.mpgLook at Clean Blasting.mpg–– Note that there is no flash rust. Note that there is no flash rust.

S b t t d i i klS b t t d i i kl–– Substrate dries quickly.Substrate dries quickly.–– Vaccuum in this particular instance was a Vaccuum in this particular instance was a

common shop vaccommon shop vaccommon shop vac.common shop vac.

Video with HandVideo with Hand--Held LanceHeld LanceNo VacuumNo Vacuum-- Open System Open System

Look at Blast and Dry mpgLook at Blast and Dry mpg Look at Blast and Dry.mpgLook at Blast and Dry.mpg–– Last areas to dry are the defects, and holes.Last areas to dry are the defects, and holes.

L k t D i Eff tL k t D i Eff t Look at Drying Effects.mpgLook at Drying Effects.mpg–– Lapse time 64 seconds. Flash rust at drying Lapse time 64 seconds. Flash rust at drying

d i t fd i t fedge interfaceedge interface–– No defects.No defects.–– Note how the water wets the surfaceNote how the water wets the surface

Effects of Contamination SourceEffects of Contamination SourceEffects of Contamination SourceEffects of Contamination Source

Look at runs mpgLook at runs mpg Look at runs.mpgLook at runs.mpg Defects Defects

–– Note how the water wets the surface.Note how the water wets the surface.–– The surface to the left has no defects and is The surface to the left has no defects and is

d i d idld i d idldried rapidly.dried rapidly.–– The area to the right has holes in the rail. The area to the right has holes in the rail.

C t i t d t ti d t d thC t i t d t ti d t d thContaminated water continued to run down the Contaminated water continued to run down the side and quickly formed “heavy” flash rust.side and quickly formed “heavy” flash rust.

Overall VideoOverall VideoOverall VideoOverall Video

Look at Flash rust1 mpgLook at Flash rust1 mpg Look at Flash_rust1.mpgLook at Flash_rust1.mpg–– 6 minutes long6 minutes long

C bi ti f d d t i t dC bi ti f d d t i t d–– Combination of good and contaminated Combination of good and contaminated substratesubstrateField evaluation by cloth wipingField evaluation by cloth wiping–– Field evaluation by cloth wipingField evaluation by cloth wiping

–– Demo of tape testDemo of tape testF ti f M d t Fl h R tF ti f M d t Fl h R t–– Formation of Moderate Flash RustFormation of Moderate Flash Rust

–– Pressure WashPressure Wash

Detecting Oil and GreaseDetecting Oil and GreaseDetecting Oil and GreaseDetecting Oil and Grease

Water Break TestWater Break Test Water Break TestWater Break Test–– Water beads up means something is on the Water beads up means something is on the

surfacesurfacesu acesu ace

Antifouling Removal on StarboardAntifouling Removal on StarboardSid Ult SSid Ult S ™ P™ PSide UltraSweepSide UltraSweep™ Process™ Process

HandHand--HeldHeldlancelance

Antifouling gremoval and automatic spot blasting of broken down epoxy anticorrosive

HandHand--Held Lance removal of Inerta Held Lance removal of Inerta from Icebreaker “Polar Star” (1994).from Icebreaker “Polar Star” (1994). Every plate had a different appearanceEvery plate had a different appearance Every plate had a different appearance. Every plate had a different appearance.

Only a small area had enough flash rust to Only a small area had enough flash rust to be of concernbe of concernbe of concern.be of concern.

How to Inspect Flash RustHow to Inspect Flash RustChapter 6Chapter 6

Field Evaluation by Wiping withField Evaluation by Wiping withField Evaluation by Wiping with Field Evaluation by Wiping with ClothCloth



Field Evaluation by WipingField Evaluation by WipingField Evaluation by WipingField Evaluation by Wiping

International Paint Hempel NACE SSPC andInternational Paint Hempel NACE SSPC and International Paint, Hempel, NACE, SSPC, and International Paint, Hempel, NACE, SSPC, and ISO languages include:ISO languages include:–– marking of objects brushed against the surface,marking of objects brushed against the surface,marking of objects brushed against the surface, marking of objects brushed against the surface, –– or sweeping of the surface with light pressure, or sweeping of the surface with light pressure, –– or removal by lightly wiping with a cloth.or removal by lightly wiping with a cloth.

Jotun uses “normal vision”.Jotun uses “normal vision”. If there is a doubt about interpretation, talk with an If there is a doubt about interpretation, talk with an pp

experienced field representative or the technical experienced field representative or the technical support group of the coating to be applied.support group of the coating to be applied.

Consistency in Method and RoutineConsistency in Method and RoutineConsistency in Method and RoutineConsistency in Method and Routine

Develop a consistent routineDevelop a consistent routine Develop a consistent routineDevelop a consistent routine Use consistent materialsUse consistent materials Use a consistent viewing angle and lightingUse a consistent viewing angle and lighting Use a consistent viewing angle and lighting.Use a consistent viewing angle and lighting. Interpretations must have clean agreement Interpretations must have clean agreement

between the coatings manufacturer person doingbetween the coatings manufacturer person doingbetween the coatings manufacturer, person doing between the coatings manufacturer, person doing the work (contractor), person accepting the work the work (contractor), person accepting the work (owner), and the third party inspector.(owner), and the third party inspector.( ), p y p( ), p y p

Prepare a prePrepare a pre--start panel and get agreement. start panel and get agreement. (optional but good idea)(optional but good idea)( p g )( p g )

Wipe or Sweep with a ClothWipe or Sweep with a ClothWipe or Sweep with a ClothWipe or Sweep with a Cloth

Light PressureLight Pressure Light PressureLight Pressure Consistent length of pathConsistent length of path Consistent type of clothConsistent type of cloth

–– Keep your supply of “evaluation” cloth wipes Keep your supply of “evaluation” cloth wipes separate from the bin of everyday cloth wipes.separate from the bin of everyday cloth wipes.

–– Consider using lintConsider using lint--free cloth wipes from free cloth wipes from laboratory supplylaboratory supply

Hand Wipe with ClothHand Wipe with ClothHand Wipe with ClothHand Wipe with Cloth

Light Flash RustLight Flash Rust-- Hand WipeHand WipeLight Flash RustLight Flash Rust-- Hand WipeHand Wipe15:33:56 2008-06-09 13:17:14 2008-06-09

Hand WipeHand WipeHand WipeHand Wipe

FingertipsFingertips

N 1 30N 1 30Afternoon 3:30Afternoon 3:30 Noon 1:30Noon 1:30

Hand Wipe TestHand Wipe Testpp

Hand WipeHand WipeHeavy Flash RustHeavy Flash RustHeavy Flash RustHeavy Flash Rust

“Swatch Wipe”“Swatch Wipe”Swatch WipeSwatch Wipe

Swatch Test Came From Level 3 NACE CIPSwatch Test Came From Level 3 NACE CIP withwith Swatch Test Came From Level 3 NACE CIPSwatch Test Came From Level 3 NACE CIP-- with with Surface Technology Surface Technology

Make a “swatch” or wad of the cloth Add tape toMake a “swatch” or wad of the cloth Add tape toMake a swatch or wad of the cloth. Add tape to Make a swatch or wad of the cloth. Add tape to make a handle.make a handle.

Lightly wipe the swatch over the surface.Lightly wipe the swatch over the surface.Lightly wipe the swatch over the surface.Lightly wipe the swatch over the surface. Be consistent in type of cloth, path length.Be consistent in type of cloth, path length. This avoids the discussion of lightly wiping andThis avoids the discussion of lightly wiping andThis avoids the discussion of lightly wiping and This avoids the discussion of lightly wiping and

direct placement of the fingers on the substrate. direct placement of the fingers on the substrate. Get cross motion without pressure.Get cross motion without pressure.Get c oss ot o t out p essu eGet c oss ot o t out p essu e

Swatch TestSwatch Test20082008--0606--1010

8:00 AM8:00 AM8:00 AM8:00 AM

Compare two types of clothCompare two types of clothCompare two types of clothCompare two types of cloth

I thi fi ld l t th ltIn this field example, we got the same results.

Brush WipeBrush WipeBrush WipeBrush Wipe

If there is a doubt about interpretation, If there is a doubt about interpretation, talk with an experienced field talk with an experienced field

representative or the technical supportrepresentative or the technical supportrepresentative or the technical support representative or the technical support group of the coating to be applied.group of the coating to be applied.

Sweep the surface with a Cloth Sweep the surface with a Cloth wrapped around a brushwrapped around a brush

Light PressureLight Pressure Light PressureLight Pressure Consistent length of pathConsistent length of path Consistent type of clothConsistent type of cloth

BE CONSISTENT!!BE CONSISTENT!!

Todd Pacific Todd Pacific Brush Wipe ProcedureBrush Wipe Procedure

Standard cloth is cheesecloth It is availableStandard cloth is cheesecloth It is available Standard cloth is cheesecloth. It is available Standard cloth is cheesecloth. It is available in every store. in every store. U t d d b hU t d d b h Use a standard brush.Use a standard brush. Define the amount of pressureDefine the amount of pressure

–– Brush as if painting a doorBrush as if painting a door-- lightly downlightly down Define the amount of contact. Define the amount of contact.

–– 2 inches (5 cm)2 inches (5 cm)

Consistent BrushConsistent BrushConsistent BrushConsistent Brush

Brush as if painting a doorBrush as if painting a doorBrush as if painting a doorBrush as if painting a door

BrushBrush20082008--0606--1111

Section Wh Li htWhere Light, moderate, andheavy flash rust had formed.

Light Moderate HeavyLight Moderate HeavyLight Moderate HeavyLight Moderate Heavy

BrushBrushLight Moderate HeavyLight Moderate Heavy

Swatch Wipe BrushSwatch Wipe Brush20082008--0606--09 Light09 Light

Fi TiFinger Tips

Heavy Heavy Swatch Brush WipeSwatch Brush Wipe


WipeWipe SwatchSwatch BrushBrush WipeWipe SwatchSwatch BrushBrush All three methods are lead to same All three methods are lead to same

l il iconclusions.conclusions. Be ConsistentBe Consistent

–– ClothCloth–– PressurePressure–– Length of wipeLength of wipe

How to Inspect Flash RustHow to Inspect Flash RustHow to Inspect Flash RustHow to Inspect Flash RustChapter 7Chapter 7T T tT T tTape TestTape Test



Hempel Tape TestHempel Tape Test

This is a variation of the ISO 8502This is a variation of the ISO 8502--33This is a variation of the ISO 8502This is a variation of the ISO 8502 3 3 assessment of dust with pressure assessment of dust with pressure sensitive tape.sensitive tape.

Be consistent in the type of tape.Be consistent in the type of tape.

Be consistent in the pressure placed Be consistent in the pressure placed th tth ton the tape. on the tape.

Light Moderate HeavyLight Moderate HeavyLight Moderate HeavyLight Moderate Heavy

TapeTape-- Moderate HeavyModerate HeavyTapeTape Moderate HeavyModerate Heavy

Moderate Area Moderate Area Heavy AreaHeavy Area20082008 0606 090920082008--0606--0909 20082008--0606--0909

Tape Test after Pressure WashingTape Test after Pressure WashingTape Test after Pressure WashingTape Test after Pressure Washing

Start Tape pulls 11:06:15

Heavy Area After Pressure WashHeavy Area After Pressure WashHeavy Area After Pressure WashHeavy Area After Pressure Wash

There was no dust on the tapesThere was no dust on the tapesThere was no dust on the tapesThere was no dust on the tapes

Finally the last tapeFinally the last tapeFinally the last tapeFinally the last tape

Tape PageTape PageTape PageTape Pageof Heavy Rustof Heavy Rustand stained and stained

areaareaareaareaAfter PressureAfter Pressure

W hiW hiWashing.Washing.This is No This is No

Flash Rust.Flash Rust.

How to Inspect Flash RustHow to Inspect Flash RustChapter 8Chapter 8Chapter 8Chapter 8SummarySummary



EvaluationEvaluationEvaluationEvaluation ALL GUIDES LEAD TO THE SAMEALL GUIDES LEAD TO THE SAMEALL GUIDES LEAD TO THE SAME ALL GUIDES LEAD TO THE SAME

CONCLUSIONS and EVALUATIONS.CONCLUSIONS and EVALUATIONS. The methods to evaluate Flash Rust are The methods to evaluate Flash Rust are

Subjective.Subjective.–– Visual Appearance andVisual Appearance and

A t f t f L D tA t f t f L D t–– Assessment of amount of Loose DustAssessment of amount of Loose Dust Hand WipeHand Wipe Hand SwatchHand Swatch BrushBrush TapeTape


Based on the subjective methods FlashBased on the subjective methods Flash Based on the subjective methods, Flash Based on the subjective methods, Flash Rust is classified asRust is classified as–– NoneNoneNoneNone–– LightLight–– ModerateModerateModerateModerate–– HeavyHeavy

With practice, the subjective methods workWith practice, the subjective methods workWith practice, the subjective methods work With practice, the subjective methods work well.well. GO OUT and GIVE it a TRY!GO OUT and GIVE it a TRY!GO OUT and GIVE it a TRY!GO OUT and GIVE it a TRY!


The subjective methods ofThe subjective methods of The subjective methods of The subjective methods of Examining in good lighting conditionsExamining in good lighting conditions

AndAnd

Performing a wipe or brush or tape testPerforming a wipe or brush or tape testwork well in the shipyards.work well in the shipyards.

Contact InformationContact InformationContact InformationContact Information

Lydia Frenzel, Ph.D.Lydia Frenzel, Ph.D. [email protected]@advisorycouncil.org TelTel--Fax:+1 800Fax:+1 800--308308--74167416 Tel: +1 512Tel: +1 512--392392--22102210

OnOn Site training is availableSite training is available OnOn--Site training is available.Site training is available.

How to Inspect Flash RustHow to Inspect Flash RustHow to Inspect Flash RustHow to Inspect Flash RustOptional ChapterOptional Chapter

C t l d Miti ti fC t l d Miti ti fControl and Mitigation ofControl and Mitigation ofFlash RustFlash Rust



Field ExperienceField ExperienceHow Todd Pacific Approaches InHow Todd Pacific Approaches In--How Todd Pacific Approaches InHow Todd Pacific Approaches In

House TrainingHouse TrainingTraining ManualTraining Manual

National Shipbuilding ResearchNational Shipbuilding ResearchNational Shipbuilding Research National Shipbuilding Research Program 2008Program 2008

How to Inspect Flash RustHow to Inspect Flash RustHow to Inspect Flash RustHow to Inspect Flash RustOptional Chapter Optional Chapter

F t D t i tiF t D t i tiFuture DeterminationsFuture DeterminationsDigital CameraDigital Cameragg

