Effect of micro-galvanic corrosion on corrosion fatigue cracking of the weld joint of high strength bridge steel

被引：11

作者：

Li, Qi ^{[1
]}

Yao, Qiong ^{[2
]}

Sun, Liyang ^{[1
]}

Ma, Hongchi ^{[1
]}

Zhang, Chuang ^{[2
]}

Wang, Ning ^{[2
]}

机构：

[1] Univ Sci & Technol, Inst Adv Mat & Technol, Natl Mat Corros & Protect Data Ctr, Key Lab Corros & Protect MOE, Beijing 100083, Peoples R China

[2] Xichang Satellite Launch Ctr, Xichang 615000, Sichuan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 170卷

基金：

中国国家自然科学基金;

关键词：

High-strength bridge steel; Marine atmosphere; Local electrochemical technique; Micro-galvanic corrosion; Corrosion fatigue failure; SCANNING KELVIN PROBE; E690; STEEL; FORCE MICROSCOPY; GROWTH-BEHAVIOR; CR; MICROSTRUCTURE;

D O I：

10.1016/j.ijfatigue.2023.107568

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The local electrochemical and corrosion fatigue cracking behavior of the weld joint of Q690qE high-strength bridge steel was investigated in simulated marine environment. It reveals the weld joint was vulnerable to corrosion fatigue failure in polluted marine atmosphere with the corrosion fatigue life considerably lower than that of parent metal. The micro-galvanic corrosion effect between CGHAZ and WM played a dominant role in the corrosion fatigue failure of the weld joint, leading to the final fracture mostly at CGHAZ. The micro-galvanic corrosion was caused by Volta potential variation among various subzones, which was evidenced by local electrochemical techniques.

引用

页数：15

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