无裂纹电镀铬出现裂纹的原因分析  

Analysis on formation of cracks in electroplated crack-free chromium coating

作　　者：周科 娄霞[1,2] 李智 温青妮[1,2] 赵强 闫康平[3] ZHOU Ke;LOU Xia;LI Zhi;WEN Qingni;ZHAO Qiang;YAN Kangping(State Key Laboratory for Long-life High-temperature Materials,Deyang 618402,China;不详)

机构地区：[1]长寿命高温材料国家重点实验室,四川德阳618000 [2]东方电气集团东方汽轮机有限公司,四川德阳618000 [3]四川大学化学工程学院,四川成都610065

出　　处：《电镀与涂饰》2020年第14期901-904,共4页Electroplating & Finishing

基　　金：国家自然科学基金(51702027)。

摘　　要：针对某无裂纹电镀铬产品出现裂纹的问题,采用电感耦合等离子体质谱法(ICP-MS)和离子色谱法(IC)分析了问题镀液的杂质含量,并进行了一系列的实验研究。结果表明,镀液中Cu^2+的质量浓度高达666.0 mg/L,电镀过程中铜件掉入镀液,并与镀液中六价铬反应导致有三价铬生成是本次故障的主要原因,给出了解决和预防措施。As for the problem of cracks formed in crack-free chromium-electroplated products,the contents of different impurities in the failed electroplating bath were analyzed by inductively coupled plasma mass spectrometry(ICP-MS)and ion chromatography,and some experiments were conducted.It was found that the mass concentration of Cu^2+was up to 666.0 mg/L.The problem was mainly caused by the fall of copper parts into the bath which reacted with hexavalent chromium,forming trivalent chromium.Some countermeasures and prevention measures were given.

关 键 词：六价铬电镀 裂纹 铜离子 三价铬 故障排除 

分 类 号：TQ153.11[化学工程—电化学工业]