镍杂质引起的硫酸盐三价铬镀黑铬故障

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英文篇名：A problem caused by nickel impurities for trivalent black chromium plating in sulfate electrolyte 作者：黎小阳 ; 郭崇武 ; 刘永 英文作者：LI Xiao-yang;GUO Chong-wu;LIU Yong;Guangzhou Ultra Union Chemicals Ltd.; 关键词：三价铬镀黑铬 ; 镍杂质 ; 镀层粗糙 ; 螯合沉淀法 ; 小电流电解法 ; 故障排除 英文关键词：trivalent black chromium plating;;nickel impurity;;rough coating;;chelation precipitation;;low-current electrolysis;;troubleshooting 中文刊名：DDTL 英文刊名：Electroplating & Finishing 机构：广州超邦化工有限公司; 出版日期：2019-02-15 出版单位：电镀与涂饰 年：2019 期：v.38;No.333 语种：中文; 页：DDTL201903006 页数：2 CN：03 ISSN：44-1237/TS 分类号：26-27

摘要

描述了一次硫酸盐三价铬镀黑铬中镍杂质含量超过工艺上限时,高电流密度区镀层出现粗糙故障的排除过程。用二乙基二硫代氨基甲酸钠螯合沉淀法或电解法去除镍杂质后补加发黑剂,镀液恢复正常。
        A problem of rough coating formation in high current density area caused by the exceeding of nickel impurities content during trivalent black chromium electroplating in sulfate electrolyte and the corresponding treatment method were described. It was solved by removing nickel impurities via precipitation with sodium dimethyldithiocarbamate, a chelating agent, or via low-current electrolysis, and replenishing the blackening agent.

引文

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