中性电镀镍工艺探索研究  

Exploration of Neutral Nickel Electrodeposition Process

作　　者：谢幸秦 周龙 李延伟 何贵香 XIE Xingqin;ZHOU Long;LI Yanwei;HE Guixiang(Guilin University of Technology at Nanning,Nanning 530001,China)

机构地区：[1]桂林理工大学南宁分校,广西南宁530001

出　　处：《化工技术与开发》2018年第2期18-22,共5页Technology & Development of Chemical Industry

基　　金：广西高校青年教师基础能力提升项目(KY2016YB907)

摘　　要：在中性镀镍电解液中,以柠檬酸钠作为镍配位剂,镀液温度控制在45℃,研究了柠檬酸钠含量和阴极电流密度对镍镀层表面形貌、电解液电流效率和阴极极化的影响。结果表明,当阴极电流密度为0.6A·dm^(-2)、柠檬酸钠质量浓度为120g·L^(-1)时,镀层平整致密且裂纹较少,电流效率最高。糖精作为光亮剂,能较好地减少镍镀层裂纹,当糖精质量浓度为1.8g·L^(-1)时,裂纹彻底消失,但对划痕的消除效果不佳。但过高的糖精质量浓度不利于镀液电流效率,糖精质量浓度为0.6g·L^(-1)时有较好的镀液电流效率。In this paper,sodium citrate was used as nickel complexing agent in the neutral plating solution.Electroplating was took place when the solution temperature was 45℃.The content of sodium citrate and the cathode current density were discussed to inspect the influence on the deposit morphology,electrolyte current efficiency and cathodic polarization.The results indicated that with the increasing of sodium citrate content,the cathode-current density of electrolyte decreased.The nickel deposit obtained was smooth and compact,when the cathode-current density was 0.6 A/dm2 and the concentration of sodium citrate was 120g/L,the current efficiency was maximum.As the brightener,saccharin was better to reduce the crack.When the concentration of saccharin was 1.8g/L,the crack disappeared.But the removing effect of scratch was not good.Then excessive mass concentration of saccharin was bad for current efficiency of plating solution.When the concentration of saccharin was 0.6g/L,the current efficiency of plating solution was better.

关 键 词：中性镀镍 柠檬酸钠 糖精 镀层性能 

分 类 号：TQ153[化学工程—电化学工业]