铝合金件环保镀银

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英文篇名：Environmentally friendly silver plating process for aluminum alloys 作者：许荣国 ; 詹益腾 ; 周林海 英文作者：XU Rong-guo;ZHAN Yi-teng;ZHOU Lin-hai;Guangzhou Sanfu New Materials Technology Co., Ltd.; 关键词：铝合金 ; 电镀 ; 银 ; 铜 ; 沉锌 ; 清洁生产 英文关键词：aluminum alloy;;electroplating;;silver;;copper;;zinc immersion;;cleaner production 中文刊名：DDTL 英文刊名：Electroplating & Finishing 机构：广州三孚新材料科技股份有限公司; 出版日期：2017-02-28 出版单位：电镀与涂饰 年：2017 期：v.36;No.286 语种：中文; 页：DDTL201704007 页数：4 CN：04 ISSN：44-1237/TS 分类号：36-39

摘要

介绍了一种铝合金件环保镀银工艺,其工艺流程主要包括无氰沉锌、预镀无氰碱铜、焦磷酸盐加厚镀铜、无氰镀银和防变色处理。给出了各主要工序的溶液配方及工艺条件,测试了镀银液的深镀能力和均镀能力,以及镀层的结合力和抗硫化性能。该工艺的生产过程无氰、无镍,符合清洁生产要求。
        An environmentally friendly silver plating process for aluminum alloys was introduced. The process flow mainly includes noncyanide zinc immersion, noncyanide alkaline copper pre-plating, pyrophosphate copper plating for copper thickening, noncyanide silver plating, and anti-tarnish treatment. The bath composition and operation conditions of each procedure were presented. The throwing power and covering power of silver plating bath as well as the adhesion strength and sulfidation resistance of silver coating were tested. The process is free of cyanide and nickel, meeting the requirement of cleaner production.

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