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Effect of micro-galvanic corrosion on corrosion fatigue cracking of the weld joint of high strength bridge steel
International Journal of Fatigue ( IF 6 ) Pub Date : 2023-02-11 , DOI: 10.1016/j.ijfatigue.2023.107568
Qi Li, Qiong Yao, Liyang Sun, Hongchi Ma, Chuang Zhang, Ning Wang

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.



中文翻译:

微电偶腐蚀对高强桥梁钢焊接接头腐蚀疲劳开裂的影响

在模拟海洋环境中研究了Q690qE高强桥梁钢焊接接头的局部电化学和腐蚀疲劳开裂行为。表明焊缝在受污染的海洋大气中易发生腐蚀疲劳失效,其腐蚀疲劳寿命大大低于母材。CGHAZ 和WM 之间的微电偶腐蚀效应在焊缝腐蚀疲劳失效中起主导作用,导致最终断裂主要发生在CGHAZ。微电腐蚀是由各个亚区之间的伏特电位变化引起的,这已通过局部电化学技术得到证实。

更新日期:2023-02-16
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