An analysis of the corrosion resistance of low chromium-steel in a wet CO2 environment by the use of an electrochemical potential diagram

被引：28
|
作者：
Inaba, H [1 ]
Kimura, M [1 ]
Yokokawa, H [1 ]
机构：
[1] NATL INST MAT & CHEM RES, TSUKUBA RES CTR, TSUKUBA, IBARAKI 305, JAPAN
来源：
CORROSION SCIENCE | 1996年 / 38卷 / 09期
关键词：
low alloy steel; Pourbaix diagram;
D O I：
10.1016/0010-938X(96)00032-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion rate of the low Cr-steel was measured as a function of Cr content in a wet CO2 environment and the role of Cr on corrosion resistance has been analyzed by using the generalized electrochemical potential diagrams of the Fe-C-O-H-e(-) and Fe-Cr-C-O-H-e(-) system. The decrease in the corrosion rate with the increase in the Cr content of the steel was observed and it is explained as due to the decrease of the stable region of Fe2+ in the electrochemical potential diagram by forming the oxide layer of FexCr3-xO4. The temperature dependence of the corrosion rate showed a maximum around 343 K and it has been discussed using the metastable electrochemical potential diagram including the alpha-FeOOH phase. The comparison between the present electrochemical potential diagram and the Pourbaix diagram has also been discussed. Copyright (C) 1996 Elsevier
引用
收藏
页码：1449 / 1461
页数：13
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