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

被引：14
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] Univ Sci & Technol Beijing, Natl Mat Corros & Protect Sci Data Ctr, Key Lab Corros & Protect MOE, Beijing 100083, Peoples R China
[2] Hainan Univ, Sch Mat Sci & Engn, Key Lab Electron Microscopy Hainan Prov P, Haikou 570228, Peoples R China
[3] Univ New South Wales UNSW Sydney, Sch Mat Sci & Engn, Sydney 2052, Australia
[4] Hebei Special Equipment Supervis & Inspection Inst, Key Lab Safety Evaluat Steel Pipes & Fittings Stat, Shijiazhuang 050061, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 231卷
基金：
海南省自然科学基金; 中国国家自然科学基金;
关键词：
Duplex stainless steels; SCC; Cathodic protection; Hydrogen embrittlement; Non-steady electrochemistry; FACILITATED ANODIC-DISSOLUTION; HYDROGEN EMBRITTLEMENT; PIPELINE STEEL; PASSIVE FILMS; MICROSTRUCTURE; SUSCEPTIBILITY; DEFORMATION; ENVIRONMENT; DECOHESION; EVOLUTION;
D O I：
10.1016/j.corsci.2024.111978
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
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收藏
页数：13
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