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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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!"#$%&:
[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,
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[3]-William D., and Callister Jr. ,
Fundamentals of Materials Science
and Engineering, John Wiley &Sons, Inc., U. S. A. , pp. 205-234,
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Influence Of Heat Treatments on
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Carbon Steels", Msc. Dissertation.
College of Engineering.
Department of Mechanical
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, 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
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3. John F. K. , "Corrosion Control
and Treatment Manual",Kennedy Space Center, RevisionC ! TM ! 584 C / Florida, U. S.
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4. Huang R. T. "Corrosion
Protection of Carago Tanks",
Cheveron Shipping Company,
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Tokyo, Japan, pp. 883 ! 892 ,
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and Missert N. A., "Characterizing
Corrosion Behavior UnderAtmospheric Conditions Using
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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"- $A) ;(8%A.L4@P- MK4Q.
Exposure Time(Week)
AverageTemperature
(0C)
RelativelyHumidity (%)
Total Rainfall(mm)
"#%'()*(,-) 6.3 79 88
./123() "#%'() 6.9 75 86.4
.3(23() "#%'() 6 80 94
Composition (%)
TYPE FeV Cu Ni Mo Cr S P Mn Si C
Bal. 0 . 0
0 . 0
0 3
0 . 0
9 9
0 . 0
0 . 0
4
0 . 0
0 5
0 . 0
4
0 . 1
2
0 . 0
7
0 . 0
5
Steel 1
Bal. 0 . 0
0 . 0
6
0 .
0 9 6
0 . 0
0 . 0
7
0 .
0 2 2
0 . 0
3
0 . 3
9
0 . 1
9
0 . 2
Steel 2
Bal. 0 . 0
0 . 1
7
0 . 0
9
0 . 0
0 . 0
9
0 . 0
2
0 .
0 2 8
0 . 4
4
0 . 2
3
0 . 3
5
Steel 3
Bal. 0 . 0
0 .
2 1
0 .
0 8
0 . 0
0 3
0 .
1 2
0 . 0
1 2
0 . 0
2 1
0 .
5 6
0 .
2 6
0 .
5
Steel 4
Bal. 0 . 0
0 3
0 . 3 7
0 . 0 7
0 . 0
1 3
0 . 1
5 9
0 . 0
0 8
0 . 0 1
0 . 6 7
0 . 2 8
0 . 6 5
Steel 5
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)R^$/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-)
8.0Dissolve Oxygen
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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)
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Pearlite Ferrite Pearlite Ferrite
Pearlite Ferrite
Pearlite Ferrite
Pearlite Ferrite
d)
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0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
4 weeks 6 weeks 8 weeks
% Carbon
-&J )6: (!"#$%&'( )*+'( -&./ -012 3*4 )$J'( H%2 , X$1/'( 52B -2%4 $89:/ .
C o r r o s i o n R a t e ( m p y )