Corrosion behaviour of 13Cr stainless steel under stress and crevice in 3.5 wt.% NaCl solution
Corrosion behaviour of 13Cr stainless steel under stress and crevice in 3.5 wt.% NaCl solution
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13Cr不锈钢在3.5重量％应力和缝隙下的腐蚀行为
DOI：
10.1016/j.corsci.2019.108290
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发表时间：
2020-02-01
影响因子：
8.3
通讯作者：
Zhang, G. A.
中科院分区：
文献类型：
--
作者：
Li, Y. Z.;Wang, X.;Zhang, G. A.
用电化学方法研究了13Cr不锈钢在3.5 wt.% NaCl溶液中应力和缝隙作用下的腐蚀行为。结果表明，外加应力使钝化膜劣化，导致点蚀电位负移，点蚀敏感性增强。13Cr不锈钢的缝隙腐蚀涉及三个阶段：诱发期、快速发展期和稳定发展期。在裂缝与应力共存的情况下，外加应力增强的阳极反应加速了裂缝内H+和Cl-离子的积累，缩短了诱导期，促进了裂缝腐蚀的扩展。
The corrosion behaviour of 13Cr stainless steel under stress and crevice in 3.5 wt.% NaCl solution was studied by electrochemical measurements. It is demonstrated that the applied stress degrades the passive film, resulting in negative shift of pitting potential and enhanced susceptibility of pitting corrosion. The crevice corrosion of 13Cr stainless steel involves three stages: induction period, rapid development period and stable development period. In the coexistence of crevice and stress, the enhanced anodic reaction by applied stress accelerates the accumulation of H+ and Cl- ions inside crevice, which shortens the induction period and promotes the propagation of crevice corrosion.