AZ 91D镁合金化学镀镍前处理工艺研究  

A Study of Pretreatment Process for Electroless Nickel Plating on AZ 91D Magnesium Alloy

作　　者：赵彦彪[1] 杨培霞[1] 杨炜婧[1] 袁伟坚[1] 安茂忠[1] 

机构地区：[1]哈尔滨工业大学化工学院,黑龙江哈尔滨150001

出　　处：《电镀与环保》2011年第6期9-11,共3页Electroplating & Pollution Control

摘　　要：对AZ 91D镁合金碱性化学镀镍的前处理工艺进行研究,得到了镁合金一步磷化的前处理工艺,确定了AZ 91D镁合金磷化液的组成及工艺条件,经一步磷化前处理后即可进行化学镀镍。采用扫描电镜(SEM)、能谱成分分析(EDS)对磷化后的试片的微观形貌和组成成分进行了分析,并测定了AZ 91D镁合金及其化学镀镍后的Tafel曲线,以此评价镀层的耐蚀性能。结果表明:在一步磷化前处理工艺后直接进行碱性化学镀镍可得到外观较佳,且耐蚀性良好的Ni-P合金镀层。The pretreatment process for electroless alkaline Ni plating on AZ 91D magnesium alloy was studied,from which a one-step phosphating pretreatment process was obtained for magnesium alloy.The solution composition and process conditions were determined.After the one-step phosphating pretreatment,electroless nickel plating was ready to be performed.The micro-morphology and composition of the specimen after pre-treatment were analyzed by SEM and EDS.The Tafel curves of the AZ 91D magnesium alloy without and with the Ni-P alloy coating were tested to evaluate the corrosion resistance of the coating.The results show that direct alkaline electroless nickel after one-step phosphating pretreatment can get a Ni-P alloy coating with a better look and a good corrosion resistance.

关 键 词：镁合金 化学镀镍 磷化 耐蚀性 

分 类 号：TQ153[化学工程—电化学工业]