Observations of stress corrosion cracking in pipeline steel in corrosive seawater environment including detailed observation of the crack initiation mechanism

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2024-10-26 DOI:10.1016/j.jelechem.2024.118743

Xinyi Liu , Ming Wu , Ke Gong , Dongxu Sun , Xu Wang , Jin Li , Jin Du , Jacob C. Huang

引用次数: 0

Abstract

The effect of stress concentration on crack initiation and propagation during stress corrosion cracking of carbon steel in alternate wet and dry marine condition was studied by constant load tensile and microelectrochemical test. Results showed that the notch front does not crack but pitting occurs in the corrosion process under load-free condition. Under the loading condition, the anodic dissolution (AD) near the notch gradually intensified, and this effect become severer with increasing load. The local environment of the load-induced rapid AD and hydrogen evolution (HE) can lead to crack initiation, indicating that the joint action of AD and HE is the main SCC mechanism.

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观察腐蚀性海水环境中管道钢的应力腐蚀开裂情况，包括详细观察裂纹的形成机制

通过恒载拉伸和微电化学试验，研究了干湿交替海洋条件下碳钢应力腐蚀开裂过程中应力集中对裂纹萌发和扩展的影响。结果表明，在无负载条件下，腐蚀过程中缺口前沿不会开裂，但会出现点蚀。在加载条件下，缺口附近的阳极溶解（AD）逐渐加剧，并且这种影响随着负载的增加而变得更加严重。负载引起的快速阳极溶解和氢演化（HE）的局部环境可导致裂纹萌生，这表明阳极溶解和氢演化的共同作用是 SCC 的主要机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.