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通过对不同工艺制备的薄镀膜层腐蚀失效分析,总结出离子镀装饰镀膜的局部针孔腐蚀属于镀层-腐蚀介质-基体组成腐蚀电池的电化学电极腐蚀,介绍了腐蚀行为特征和腐蚀形貌,并揭示了镀层表面缺陷是腐蚀介质通过镀层到达基体组成腐化电池的腐蚀通道。
Through the analysis of the corrosion failure of the thin coating prepared by different processes, the local pinhole corrosion of the plating coating is concluded. The electrochemical corrosion of the electrode belongs to the coating-corrosion medium-matrix corrosion cell. The corrosion behavior and corrosion morphology are introduced. And revealed that the coating surface defect is the corrosive channel through which the corrosive medium reaches the substrate through the coating to form a corrosive battery.