不同电镀锌添加剂对钝化膜外观与耐蚀性的影响  

Effects of different zinc electroplating additives on appearance and corrosion resistance of passivation film on zinc coating

作　　者：江茜 胡哲 戴建和 杨娟 李玉梁 王杰 

机构地区：[1]武汉吉和昌化工科技股份有限公司,湖北武汉430023

出　　处：《电镀与涂饰》2016年第7期354-357,共4页Electroplating & Finishing

摘　　要：分别以碱性锌酸盐镀锌添加剂、钾盐镀锌油溶性添加剂、钾盐镀锌水溶性添加剂制备锌层,然后采用相同的三价铬钝化工艺,研究了不同电镀锌添加剂对钝化膜外观与耐蚀性的影响。结果表明:使用酸锌水溶性添加剂所得锌层钝化膜的耐盐雾性能最佳,在实际应用过程中可在同等钝化条件下替代中低端锌酸盐镀锌,使钝化膜兼具功能性与装饰性。Zinc coatings were electroplated with alkaline zincate zinc plating additive, oil-soluble potassium chloride zinc plating additive, and water-soluble potassium chloride zinc plating additive respectively, and then treated with a same trivalent chromium passivation process. The effects of different zinc plating additives on appearance and corrosion resistance of passivation film were studied. The results showed that the passivation film formed on the zinc coating prepared with a water-soluble acid zinc plating additive has the best resistance to salt spray corrosion. In practical applications, acid zinc electroplating with a water-soluble additive makes the passivation films having both functional and decorative effects, being an alternative for low to mid-class zincate zinc electroplating under the same passivation conditions.

关 键 词：电镀锌 添加剂 蓝白钝化 外观 耐蚀性 中性盐雾试验 

分 类 号：TQ153.15[化学工程—电化学工业] TG178[金属学及工艺—金属表面处理]