CORROSION BEHAVIORS OF LOW ALLOY STEEL AND CARBON STEEL DEPOSITED WITH NaCl AND NaHSO3 UNDER DRY/HUMID ALTERNATIVE CONDITION

YU Quan-Cheng; YU Zhen-Yao; WANG Chuan

doi:10.3724/SP.J.1037.2010.00248

2010 , Vol. 46 >Issue 9: 1133 - 1140

DOI: https://doi.org/10.3724/SP.J.1037.2010.00248

论文

CORROSION BEHAVIORS OF LOW ALLOY STEEL AND CARBON STEEL DEPOSITED WITH NaCl AND NaHSO₃UNDER DRY/HUMID ALTERNATIVE CONDITION

YU Quan-Cheng ,
YU Zhen-Yao ,
WANG Chuan

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State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

Received date: 2010-05-20

Revised date: 2010-06-29

Online published: 2010-09-11

Supported by

Supported by Science and Technology Plan Project of Shenyang (No.1091182-1-00)

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Abstract

The corrosion behaviors of low alloy steel P265GH and carbon steel Q235 deposited with NaCl and NaHSO₃ under dry/humid alternative condition were investigated by FTIR, XRD, SEM and galvanostatic method. The results reveal that under present experimental condition, corrosion rates of low alloy steel and carbon steel decrease with prolonging time and their mass losses are almost identical. Besides, corrosion resistance of low alloy steel P265GH is not better than that of carbon steel Q235. The corrosion products formed on the two steels are mainly composed of δ-FeOOH, α-FeOOH, Fe₃O₄, γ-FeOOH and sulphate, among which δ-FeOOH is predominant. The existence of δ-FeOOH accounts for the decrease of corrosion rates of the steels.

Key words： low alloy steel; carbon steel; atmospheric corrosion; dry/humid alternative environment

Cite this article

YU Quan-Cheng , YU Zhen-Yao , WANG Chuan . CORROSION BEHAVIORS OF LOW ALLOY STEEL AND CARBON STEEL DEPOSITED WITH NaCl AND NaHSO₃UNDER DRY/HUMID ALTERNATIVE CONDITION[J]. Acta Metall Sin, 2010 , 46(9) : 1133 -1140 . DOI: 10.3724/SP.J.1037.2010.00248

References

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