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Study of The Effect of Carbon Contents on The Corrosion

Rate of Carbon SteelsAbstract

The Plain-Carbon steel are considered as one of the most commonmetallic materials used in engineering and industrial applications due to its ability

in altering the micro-structures and mechanical properties as the result of carboncontent. These alterations have direct effect on the corrosion rate of steel by

building up galvanic corrosion cells between its microscopic phases. The effect ofcarbon content on the corrosion resistance of Hypo-eutectoid plain carbon steels

having different carbon contents such as 0.05%C , 0.2%C , 0.35%C , 0.5%C , and

0.65%C have been studied using three testing durations which are 4 weeks, 6weeks, and 8 weeks and different corrosion environments such as atmosphere,fresh water, and salt water. The aim of the present work is to obtain the effect of

carbon content on the corrosion resistance of steels in different corrosion medium

by using the weight loss technique as a function of the corrosion resistance. Theresults, which have been obtained during this work show that a correlation can be

made between corrosion rates and steels carbon content, and the corrosionresistance decreases with the increase in carbon content.

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7/21/2019 Text (19) Arabic


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!"#$%&:

[1]-Al-Abdullatif Mohammed O.

M. "Design And Optimization OfCathodic Protection Systems Used

In Prevention Of PipelinesCorrosion", PhD. Dissertation.

College Of Engineering , Chemical

Engineering Department, King

Saud University, Kingdom Of

Saudi Arabia , pp. 21-35, (2007)

[2]-Winston R. , Uhlig's Corrosion

Handbook, John Wiley & Sons,

Inc., Canada, pp.100-125 ,(2000)

[3]-William D., and Callister Jr. ,

Fundamentals of Materials Science

and Engineering, John Wiley &Sons, Inc., U. S. A. , pp. 205-234,

(2001).[4]-Trethewey K. R., "Corrosion

Science and Engineering", 2ndEdition, Wesley Longman

Limited, London, U. K. pp. 60-65,(1996).

[5]-Wadullah H. Mohamed., "

Influence Of Heat Treatments on

The Corrosion Resistance of Plain-

Carbon Steels", Msc. Dissertation.

College of Engineering.

Department of Mechanical

Engineering , University Of Mosul

, Iraq. , pp. 16-55, (2006)

[6]-Batis G., and Rakanta E.,

"Corrosion of Steel Reinforcement

Due to Atmospheric Pollution",

Journal of Cement and Concrete

Composite, Vol. 27, pp. 269 ! 275,(2005).

[7]-Raja V. S. Baligidad R. G. ,

and Shankar Rao V., "Effect ofCarbon on Corrosion Behavior ofFe3 Al Intermetallics in 0.5 N

Sulphuric Acid", Journal ofCorrosion Science, Vol. 33, pp.

521 ! 533, (2002).

[8]-Tomlinson W. J., and Giles K.,

"The Microstructures and

Corrosion of 0.79C Steel

Tempered in the Range 100 ! 700?C", Journal of Corrosion Science,

Vol. 23 , pp. 1353 ! 1359, (1983).

[9]-Corvo F., and Minotas J.,"Changes in Atmospheric

Corrosion Rate Caused by Chloric

Ions Depending on Rain Regime",

Journal of Corrosion Science, Vol.

47, pp. 883 ! 892, (2005).

[10]-Chotimongkol L., and

Nakkuntod R., "Atmospheric

Corrosion of Metallic Building

Materials in Thailand" University

of Thailand, Thailand, pp. 16-55,(1999).[11]- Chikh Z. A. , Dermaj A., and

Chebabe D., "Electrochemical andAnalytical Study of Corrosion

Inhibition on Carbon Steel in HCIMedium" , Journal of Corrosion

Science, Vol. 47, pp. 447 ! 459,

(2005).

1. Yunping X., and Zhaohui X.,

"Corrosion Effect of Magnesium

Chloride and Sodium Chloride

on Automobile Components",University of Colorado, U. S. A.,

Report No. CDOT ! DTD ! R2004 ! 4, pp 34-39 ,(2002).

2. Vera R., and Rosales B. M. ,

"Effect of The Exposure Angle

in The Corrosion Rate of Plain

Carbon Steel in a MarineAtmosphere", Journal of

Corrosion Science ,Vol. 45, pp.321 ! 337, (2002).

3. John F. K. , "Corrosion Control

and Treatment Manual",Kennedy Space Center, RevisionC ! TM ! 584 C / Florida, U. S.

A. , pp. 584. ,(1994).

4. Huang R. T. "Corrosion

Protection of Carago Tanks",

Cheveron Shipping Company,





7/21/2019 Text (19) Arabic


& '(*,"- !#%./$1"1*24"-(!#6"-728)(8"-7201074 -&./'( -012 3*4 5"#$%&'( 6#7! $89:/ 67($0 !"#$%&'( )*+'( ,

Tokyo, Japan, pp. 883 ! 892 ,

(2000).[11]-Wall F. D., Martinez M. A.,

and Missert N. A., "Characterizing

Corrosion Behavior UnderAtmospheric Conditions Using

Electrochemical Techniques",

Journal of Corrosion Science, Vol.

47, pp. 17 ! 32, (2005).

[12]- Roger H., "The Prevention of

Corrosion on Structure Steelwork",

Construction and Industrial Center,

U. S. A., pp. 8o-88, (2001).

[9]-Choi K. Y., and Kim S. S.,"Morphological Analysis and

Classification of Types of Surface

Corrosion Damage by DigitalImage Processing", Journal of

Corrosion Science, Vol. 47, pp.

1 ! 15, (2005).

[10]-Stephen C. D. , "Galvanic

Corrosion", University of

Delaware, U. S. A. , pp 54- 59,

(2003)





7/21/2019 Text (19) Arabic


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-"0I )2(:-8+%O/ # 68$($>'( 6*2%12'()*+'( PQ%2!' 6'0%12'% !"#$%&'(.

Normalising

Temp.(min)

Soaking Temp.

(>C)Carbon content

309100.05 % C

308900.2 % C

308600.35 % C

308200.5 % C

308000.65 % C

;&($)3(;?@ A.B%D- EF.G5 H16#%& I1JK"- LG+& MA-KN"- $A) ;(8%A.L4@P- MK4Q.

Exposure Time(Week)

AverageTemperature

(0C)

RelativelyHumidity (%)

Total Rainfall(mm)

"#%'()*(,-) 6.3 79 88

./123() "#%'() 6.9 75 86.4

.3(23() "#%'() 6 80 94

Composition (%)

TYPE FeV Cu Ni Mo Cr S P Mn Si C

Bal. 0 . 0

0 . 0

0 3

0 . 0

9 9

0 . 0

0 . 0

4

0 . 0

0 5

0 . 0

4

0 . 1

2

0 . 0

7

0 . 0

5

Steel 1

Bal. 0 . 0

0 . 0

6

0 .

0 9 6

0 . 0

0 . 0

7

0 .

0 2 2

0 . 0

3

0 . 3

9

0 . 1

9

0 . 2

Steel 2

Bal. 0 . 0

0 . 1

7

0 . 0

9

0 . 0

0 . 0

9

0 . 0

2

0 .

0 2 8

0 . 4

4

0 . 2

3

0 . 3

5

Steel 3

Bal. 0 . 0

0 .

2 1

0 .

0 8

0 . 0

0 3

0 .

1 2

0 . 0

1 2

0 . 0

2 1

0 .

5 6

0 .

2 6

0 .

5

Steel 4

Bal. 0 . 0

0 3

0 . 3 7

0 . 0 7

0 . 0

1 3

0 . 1

5 9

0 . 0

0 8

0 . 0 1

0 . 6 7

0 . 2 8

0 . 6 5

Steel 5





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ppm

)R^$/R^$ `1/!%( Properties 140Total Disserved Solids

54 Calcium(Ca+2

)

17 Magnesium(Mg+

)

71 Total Hardness

0.0 Phenolphthalein Alkalinity

131 Methyl Orange Alkalinity

131 Sulphates(SO4-2

)

Silicate Silica(SiO3)

0.5 Ds / m Electrical Conductivity(EC)

7.3 pH

250Chlorides(Cl-)

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ppm

)R^$/R^$ `1/!%( Properties

3% wt.Magnesium Chloride(MgCl2 )

140Total Disserved Solids

54 Calcium(Ca+2) 17 Magnesium(Mg

+2)

71 Total Hardness

0.0 Phenolphthalein Alkalinity

131 Methyl Orange Alkalinity

131 Sulphates(SO4-2

)

Silicate Silica(SiO3)

0.5 Ds / m Electrical Conductivity(EC)

7.3 pH

250Chlorides(Cl-)

8.0Dissolve Oxygen





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c)

a) b)

e)

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Pearlite Ferrite

Pearlite Ferrite

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d)





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% Carbon

0

1

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Atmosphere Fresh Water Salt Water

0

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Text (19) Arabic