超高耐蚀性氯化钾镀镉防护层的制备  

Preparation of protective cadmium coating with ultrahigh corrosion resistance from a potassium chloride bath

作　　者：赖奂汶[1] 郭崇武[1] 陈媚[1] 李小花 黎小阳 吴梅娟 LAI Huanwen;GUO Chongwu;CHEN Mei;LI Xiaohua;LI Xiaoyang;WU Meijuan(Guangzhou Ultra Union Chemicals Ltd.,Guangzhou 510460,China)

机构地区：[1]广州超邦化工有限公司,广东广州510460

出　　处：《电镀与涂饰》2021年第23期1762-1766,共5页Electroplating & Finishing

摘　　要：介绍了一种具有超高耐蚀性的氯化钾镀镉防护层的制备工艺,包括在金属基体上从内到外依次制备氯化钾镀镉层、铬酸盐低铬彩色钝化层和羟基石墨烯封闭层。在钢铁件上制备的这种防护层在中性盐雾试验中20160 h无白锈生成,27000 h无红锈生成。这为解决金属在热带海洋环境中的强腐蚀问题提供了新的解决方案。A novel process for preparing protective coatings with ultrahigh corrosion resistance based on potassium chloride cadmium electroplating was introduced.A cadmium layer,a low-chromium iridescent chromating layer,and a hydroxylated graphene sealing layer are formed successively on metal substrate.The protective layers prepared on steel parts are able to endure 20160 hours without the formation of white rust and even 27000 hours without the formation of red rust in neutral salt spray test.The process is a new solution to the problem of strong corrosion of metals in tropical ocean environment.

关 键 词：氯化钾镀镉 羟基石墨烯 封闭剂 中性盐雾试验 防腐蚀 

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]