Stress Corrosion Behavior and Cracking Mechanism of 2205 Duplex Stainless Steel in Acidic H2S Environment

被引:0
|
作者
Yang Shizhou [1 ,2 ]
Li Chunfu [1 ]
Li Hui [2 ]
Wen Ping [1 ]
机构
[1] Southwest Petr Univ, Chengdu 610500, Sichuan, Peoples R China
[2] Sichuan Coll Architectural Technol, Deyang 618000, Peoples R China
关键词
2205 duplex stainless steel; C-rings stress corrosion cracking test; H2S stress corrosion cracking; hydrogen induced cracking; MICROSTRUCTURE;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Stress corrosion behavior and cracking mechanism of 2205 duplex stainless steel (DSS) in saturated H2S environment were studied by C-rings Stress Corrosion Cracking Test. The results show that 2205 DSS has good resistance to stress corrosion in Test Solution A of NACE Standard. Through OM, SEM, EDS and electrochemical analysis, we find that stress corrosion cracking in 2205 DSS undergoes the following procedures: pitting corrosion on surface, formation of corrosion hole, dissociation of H2S, absorption of H atoms and their diffusion from corrosion hole to inner metal, then gathering at some place in matrix, finally initiation of cracks by hydrogen induced cracking mechanism and their gradual propagation.
引用
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页码:904 / 909
页数:6
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