高耐蚀性镀锌镍合金防护层在航空航天领域的应用  

Application of highly corrosion-resistant Zn-Ni alloy coating in aerospace industry

作　　者：秦智礼 郭崇武[2] QIN Zhili;GUO Chongwu(Guizhou Space Appliance Co.,Ltd.,Guiyang 550000,China;Guangzhou Ultra Union Chemicals Ltd.,Guangzhou 510460,China)

机构地区：[1]贵州航天电器股份有限公司,贵州贵阳550001 [2]广州超邦化工有限公司,广东广州510460

出　　处：《电镀与涂饰》2023年第9期14-17,共4页Electroplating & Finishing

摘　　要：开发了航空航天铝合金件上制备锌镍合金防护层的工艺,主要包括化学沉锌、化学预镀镍、化学镀镍、锌镍合金电镀、六价铬黑色钝化及石墨烯改性封闭剂后处理。这种镀层在中性盐雾试验1008 h后无锈蚀,热震试验无起泡和脱落,可代替传统的镀镉层,制备工艺绿色环保,具有良好的应用前景。A process for preparation of protective Zn-Ni alloy coating on aerospace aluminum alloy part was developed,including the following steps:zinc immersion,low-temperature electroless nickel pre-plating,high-temperature electroless nickel plating,Zn-Ni alloy electroplating,black hexavalent chromium passivation,and post-treatment with a graphene-modified sealant.The coating obtained thereby could endure 1008 hours of neutral salt spray test,and had no blistering or peel-off after thermal shock test.The environmentally friendly Zn-Ni alloy preparation process is a promising substitute for the conventional cadmium electroplating process and can be widely used in many applications.

关 键 词：铝合金 化学镀镍 锌镍合金电镀 六价铬黑色钝化 石墨烯改性封闭剂 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业] TG178[金属学及工艺—金属表面处理]