镁合金化学镀Ni-P合金和脉冲电镀Zn-Ni合金组合镀层  

Combination Coating of Electroless Plating Ni-P and Pulse plating Zn-Ni on Magnesium Alloy

作　　者：孙硕[1] 李永强[1] 董四清[1] 迟松江[1] 严川伟[2] 

机构地区：[1]沈阳工业大学理学院,辽宁沈阳110178 [2]中国科学院金属研究所金属腐蚀与防护国家重点实验室,辽宁沈阳110016

出　　处：《电镀与精饰》2010年第5期4-7,11,共5页Plating & Finishing

基　　金：沈阳工业大学博士启动基金(2008-33);国家高技术研究发展计划(863计划)(No.2006AA03Z538)

摘　　要：在镁合金表面制备了化学镀镍-磷合金和脉冲电镀锌-镍合金组合镀层。采用扫描电镜、能谱仪考察了镁合金化学镀N i-P合金和电镀锌-镍合金组合镀层的形貌和成分。结果表明,组合镀层表面均匀、致密、无明显缺陷。采用电化学测试系统对组合镀层进行了动电位扫描极化曲线测试。研究了镀层腐蚀后的表面形貌和成分。结果表明,在腐蚀介质中,电镀锌-镍合金层首先发生腐蚀,之后发生化学镀镍层的腐蚀,电镀锌-镍合金层不仅对化学镀镍底层的腐蚀起到机械保护作用,还作为牺牲阳极起到电化学保护作用,因此延缓了腐蚀介质对镁合金基体的腐蚀。A combination coating of electroless plated Ni-P and pulse plated Zn-Ni was prepared on magnesium alloy.Morphology and composition of the combination coating before and after corrosion of the coating were investigated with an SEM/EDAX.The results showed that the coating surface was even,compact and no obvious defects.Electrochemical mesearment methods were used to study the corrosion behavior of the combination coating.The results indicate that the electroless plated Ni-P coatings can give a mechanical protection and the pulse plated Zn-Ni coating can give an electrochemical protection for the magnesium alloy during the corrosion process.

关 键 词：镁合金 化学镀 脉冲电镀 组合镀层 腐蚀行为 

分 类 号：TG174.44[金属学及工艺—金属表面处理]