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Hard Coating Non Fretting Anti-Galling Low Friction
Superfinishing to Mirror Finishes Excellent Wear Resistance
Thinwall Technology or Heavy Build-Up Good Corrosion Resistance
0.25 1,000 Micron Thick "Cold" Process Grinding and Polishing
Service
Hardchrome Engineering Pty LtdABN 97 005 291 083
Melbourne175 Wellington RoadNorth Clayton 3168Victoria,
Australia
Telephone+61 (0) 3 9561 9555
Facsimile+61 (0) 3 9561 9155
Adelaide8 Watervale DriveGreen Fields 5107South Australia,
Australia
Telephone+61 (0) 8 8281 8733
Facsimile+61 (0) 8 8281 8087
[email protected]
www.hardchrome.com.au
HARDCHROME PLATING
For informationplease contact:
THE PROCESS
Hard Chrome plating is an electrolytic methodof depositing
Chrome for engineeringapplications, from a Chromic acid
solution.Deposits can be applied from .25 1,000microns thickness
for a wide range of applications. The thinner deposits being usedto
substantially increase the life of components in wear applications
or corrosiveenvironments, and the thicker deposits beingused for
salvage and repair of worn, damaged
or mis-machined components.
Hard Chrome is classed as a "COLD" process,the operating
temperature of 50 60Censures no detrimental effects to the
physicalor mechanical properties of the base materials.Hard Chrome
can be deposited successfullyand advantageously onto most
metallicsubstrate materials.
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THE PROPERTIES
HIGH HARDNESS electro-depositedChrome is extremely hard, with
typicalvalues of 850 - 1050 HV (63 70HRc), hence the term "Hard"
Chrome.This makes it an excellent coating for wear resistant and
abrasion resistantapplications such as Moulds and Dies,Punches,
Bearing and Seal surfaces,and sliding components.
LOW COEFFICIENT OF FRICTIONHard Chrome has a very lowcoefficient
of friction, approx. one half that of Steel. The coefficient
againstSteel of 0.16 lubricated (0.21 dry),makes it ideally suited
for suchapplications as Bearing and Sealsurfaces, and machinery
components.
WEAR RESISTANCE The highhardness and low frictional propertiesof
Hard Chrome provide it withextremely good resistance to abrasiveand
erosive wear, extending the life of components such as Moulds, Dies
andPunches etc, up to ten times in mostcases.
CORROSION RESISTANCEHard Chrome has an extremely highresistance
to atmospheric oxidation,and a good resistance to mostoxidising and
reducing agents
(with the exception to Chlorides andother Halides), hence its
wide-spreaduse in the Food and ChemicalIndustries.
SACRIFICIAL WEAR LAYERSince Hard Chrome deposits arereadily
removed with chemicalstrippers, without detrimental effect tothe
base material, the part can bestripped and re-plated
repeatedly,when wear shows, without loss or damage to the base
part. This is asignificant advantage for high wear,high cost parts
such as Plastic Mouldsand Dies where abrasive filled plasticsare
used.
MACHINING Hard Chromedeposits can be successfullyfinished by
grinding, linishingor polishing.
APPLICATIONS Hydraulic and Pneumatic
Piston Rods and Cylinders Plastic and Rubber Rolls,
Moulds, Dies, Screws, etc. Automotive and Mechanical
components Press Tools and Punches Print Cylinders and Plates
Food Machinery Valves, Gates and Bodies Mining Equipment Timber and
Paper Processing
Equipment
Pump Shafts and Rotors Textile Components
LARGE CAPACITY HardchromeEngineering offer some of thelargest
capacities available, with16 tonne lifting facility (25 tonnein
Adelaide) and plating tankscapable of accepting componentsup to 8.0
metres in length and1.3 metres diameter.
HARDCHROME PLATING
ISO 9001 Lic. 2102Standards Australia
PHYSICAL PROPERTIESDensity 6.90 7.18 g/cm 3
Atomic Weight 52.01Atomic Number 24.Melting Point 1,850 0CCoef.
of Friction 6 x 10 6/0CThermal Conductivity 0.67 W/cm 0KElectrical
Resistivity 13 66 micro hm/cmYoungs Modulus 15 x 10 6 lb/in2
Elongation 1.0%Hardness 850 1050 HVTaber Wear
Resistance 2 3 mg/1000 cyclesUltimate TensileStrength 200
MPaMagnetic Properties Non-magneticCoef. of Friction(against steel)
0.16 lubricated
0.21 dry
