摘要
针对AZ91D镁合金,采用酸性化学镀液体系进行化学镀镍,研究了化学镀温度对镀层表面形貌和截面结构的影响,讨论了不同镀液温度下表面形貌的演变过程及镀层的耐蚀性能。结果表明:温度对膜层结构和成分影响较大,温度越高,镀层表面越均匀、致密,且相同时间内获得的镀层厚度越厚,但研究中超过90℃时镀层表面及膜基界面均出现了较多孔洞;80℃时镀层含磷量达到峰值。由于温度影响了镀层结构和成分,最终导致了镀层耐蚀性的差异,80℃时镀层耐蚀性最好。
The influence of temperature on coating surface morphology and cross section structure of AZ91D alloy with chemical nickel coating were studied. The evolution process of surface morphology and corrosion resistance of the coating under different solution temperature were discussed. The results show that temperature has significant effect on the structure and composition of the coating, the coating will become more uniform and dense with the increase of temperature, and the thicker coating can be obtained at the same time. But pores were found in coating surface and interface when the plating temperature is beyond 90℃. The phosphorus content of the coating reaches the peak. The effect of temperature on the coating structure and composition led to the differences in the coating corrosion resistance, coating corrosion resistance is best at 80 ℃.
出处
《铸造技术》
CAS
北大核心
2014年第2期305-308,共4页
Foundry Technology
关键词
镁合金
化学镀
温度
magnesium
chemical plating
temperature
