涂层划伤缺陷下氯离子对金属腐蚀行为的影响

IF 1.5 Q4 ELECTROCHEMISTRY International Journal of Corrosion Pub Date : 2019-01-23 DOI:10.1155/2019/7982893

Yanyu Cui, Yongxiang Qin, Dilinuer Dilimulati, Yujun Wang

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引用次数: 14

摘要

采用线束电极(WBE)技术和电化学阻抗谱(EIS)技术研究了氯离子对带划痕缺陷涂层下金属腐蚀的影响。结果表明，WBE技术可以表征金属表面的电流。在涂层出现划痕的情况下，损伤部位始终呈现阳极电流，在损伤部位附近发生阴极反应。阴极区围绕缺陷并随时间迁移到远端。随着Cl-浓度的增加，腐蚀反应速度加快，阴极迁移速度加快，涂层剥离速度加快。结合电化学阻抗谱法，得到了均匀规律。

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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The Effect of Chlorine Ion on Metal Corrosion Behavior under the Scratch Defect of Coating

The influence of chloride ion on the corrosion of metal under coating with scratch defects was researched by wire beam electrode (WBE) technology and electrochemical impedance spectroscopy (EIS) technology. The results showed that the current of metal surface could be characterized by the WBE technology. In the case of scratches on the coating, the location of the damage always showed an anodic current, and the cathodic reaction took place adjacent to the damaged location. The cathode area surrounded the defect and migrated to the far end over time. With the increase of Cl- concentration, the corrosion reaction speeded up, the rate of cathode migration also increased, and the speed of coating stripping did as well. Combined with electrochemical impedance spectroscopy, uniform laws were obtained.

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