Stress corrosion cracking behavior of high-strength mooring-chain steel in the SO2-polluted coastal atmosphere

被引：7

作者：

Liu, Menghao ^{[1
]}

Liu, Zhiyong ^{[1
]}

Du, Cuiwei ^{[1
]}

Zhan, Xiaoqin ^{[2
]}

Yang, Xiaojia ^{[1
]}

Li, Xiaogang ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Corros & Protect Ctr, Beijing 10083, Peoples R China

[2] Zhengmao Grp Co Ltd, Zhenjiang 212000, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2022年 / 29卷 / 06期

关键词：

corrosion; marine atmospheres; mooring-chain steel; SO2-polluted coastal atmospheres; stress-corrosion cracking; X80 PIPELINE STEEL; HYDROGEN EMBRITTLEMENT; XPS; IRON; PH; MICROSTRUCTURE; SURFACES; FILM; ENVIRONMENT; PLASTICITY;

D O I：

10.1007/s12613-020-2192-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

21Cr2NiMo steel is widely used to stabilize offshore oil platforms; however, it suffers from stress-corrosion cracking (SCC). Herein, we studied the SCC behavior of 21Cr2NiMo steel in SO2-polluted coastal atmospheres. Electrochemical tests revealed that the addition of SO2 increased the corrosion current. Rust characterization showed that SO2 addition densfied the corrosion products and promoted pitting. Furthermore, slow strain rate tests demonstrated a high susceptibility to SCC in high SO2 contents. Fracture morphologies revealed that the stress-corrosion cracks initiated at corrosion pits and the crack propagation showed transgranular and intergranular cracking modes. In conclusion, SCC is mix-controlled by anodic dissolution and hydrogen embrittlement mechanisms.

引用

页码：1186 / 1196

页数：11

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