铝合金电镀金鼓包原因分析及解决措施
Analysis and solution measures for the cause of gold bulging in aluminum alloy electroplating
李大洋 1熊俊良1
作者信息
- 1. 中国空空导弹研究院,河南 洛阳 471009
- 折叠
摘要
铝合金零件镀金层出现鼓包故障,扫描电镜结果显示鼓包位置有晶间腐蚀形貌,沿晶腐蚀与表面贯通.镍层在局部位置沿晶裂纹渗入到基体内,且在沿晶裂纹内存在P元素.说明沿晶腐蚀在镀镍前已经存在,电镀后晶间腐蚀处被镀层覆盖,因此在结合力检测过程中,在晶间腐蚀产生应力的作用下,该处形成鼓包现象.机械加工和电镀过程中采取一系列防锈措施后,解决了该故障.
Abstract
The gold plating layer of aluminum alloy parts has bulging fault,and the scanning electron microscopy results showed that the location of bulging has intergranular corrosion morphology,along intergranular corrosion and surface penetration.The nickel layer infiltrates into the matrix along crystal cracks at local locations,and there is P element in the intergranular cracks.This indicates that intergran-ular corrosion has already existed before electroless nickel plating,and after gold electroplating,the intergranular corrosion area is covered by a coating.Therefore,during the binding force testing process,under the action of stress generated by intergranular corrosion,bulging phenomenon is observed at this location.After taking a series of rust prevention measures during mechanical processing and electroplating,the problem is solved.
关键词
铝合金/镀金/鼓包现象/晶间腐蚀Key words
aluminum alloy/gold-plating/bulging phenomenon/intergranular corrosion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据