Stress corrosion cracking behavior and mechanism of 2205 duplex stainless steel under applied polarization potentials

被引：0

作者：

Pan, Yue ^{[1
,2
]}

Sun, Baozhuang ^{[1
]}

Chen, Hetian ^{[3
]}

Liu, Zhiyong ^{[1
]}

Dai, Wenhe ^{[4
]}

Yang, Xiaojia ^{[1
]}

Yang, Weiting ^{[2
]}

Deng, Yida ^{[2
]}

Li, Xiaogang ^{[1
]}

机构：

[1] National Materials Corrosion and Protection Scientific Data Center, Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing,100083, China

[2] Key Laboratory of Pico Electron Microscopy of Hainan Province, School of Materials Science and Engineering, Hainan University, Haikou,570228, China

[3] School of Materials Science and Engineering, University of New South Wales (UNSW Sydney), Sydney,2052, Australia

[4] Hebei Special Equipment Supervision and Inspection Institute, Key Laboratory of Safety Evaluation of Steel Pipes and Fittings for State Market Regulation, Shijiazhuang,050061, China

来源：

Corrosion Science | 2024年 / 231卷

基金：

中国国家自然科学基金;

关键词：

Cathodic polarization - Electrochemical corrosion - Hydrogen - Hydrogen embrittlement - Residual stresses - Stainless steel - Steel corrosion - Stress corrosion cracking;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In this work, a non-steady electrochemical model for assessing stress corrosion cracking (SCC) of 2205 duplex stainless steel (DSS) under applied polarization potentials was proposed, and the SCC mechanism was revealed. With the negative shift of potentials, hydrogen enhances SCC susceptibility by deteriorating passive film, inhibiting repassivation and causing serious damage. In particular, at −850 mV (vs. SCE), the synergetic effect of anodic dissolution (AD) and hydrogen embrittlement (HE) causes severe pitting and SCC. The negative shift of applied potentials changes the preferential pit/SCC initiation site due to high hydrogen concentration in austenite. © 2024

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