Influence of external tensile stress on corrosion and trench formation of low alloy steel in a low H2S content sour corrosion environment,Materials and Corrosion

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Influence of external tensile stress on corrosion and trench formation of low alloy steel in a low H2S content sour corrosion environment
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-02-07 , DOI: 10.1002/maco.202012174
Itaru Samusawa ₁ , Daichi Izumi ₁ , Junji Shimamura ₁

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The influence of external tensile stress on corrosion and trench formation of low alloy steel in a low H₂S content sour corrosion environment was investigated. These experiments were conducted with steel for pipelines, and electrochemical methods were used. The results showed that external stress increases the amount of corrosion weight loss and trench depth by promoting the anodic dissolution reaction, and stress concentration was proven to be one of the driving forces for trench formation due to localized corrosion. Based on the experimental findings, the mechanism of trenching was discussed from the viewpoint of promotion of the anodic dissolution reaction by dislocations.

中文翻译：

低H2S酸性腐蚀环境下外部拉应力对低合金钢腐蚀及沟槽形成的影响

研究了外部拉应力对低H ₂ S 含量酸性腐蚀环境下低合金钢腐蚀和沟槽形成的影响。这些实验是用钢制成的管道进行的，并使用了电化学方法。结果表明，外应力通过促进阳极溶解反应增加腐蚀失重和沟槽深度，应力集中被证明是局部腐蚀形成沟槽的驱动力之一。根据实验结果，从位错促进阳极溶解反应的角度讨论了开槽机理。

更新日期：2021-02-07

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