材料科学
腐蚀
应力腐蚀开裂
成核
有限元法
阳极
冶金
压力(语言学)
复合材料
扩散
阴极保护
变形(气象学)
断裂力学
点蚀
结构工程
电极
物理化学
有机化学
化学
哲学
语言学
工程类
物理
热力学
作者
Ke Gong,Ming Wu,Xinyi Liu,Guangxin Liu
标识
DOI:10.1016/j.mtcomm.2022.104886
摘要
The stress corrosion cracking process of pipeline steel was modeled using cellular automata and finite element analysis, the initiation and propagation of the cracks were simulated. Before the initiation of cracks, the extent of pitting corrosion was revealed to be controlled by anodic reactions and mechanical factors, in which electrochemical corrosion played a leading role. The deposition of corrosion products created a diffusion barrier between the reactants participating in the corrosion process, limiting the rate of electrochemical reactions. During the crack propagation process, the mechanochemical effects caused by plastic deformation promoted anodic dissolution at the crack tip, driving crack propagation.
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