镍阳极溶解的工艺优化与性能调控  

Process Optimization and Performance Control for Reducing the Rate of Nickel Anode Dissolution

作　　者：石海明[1] 黄章崎 王春霞[2] 彭叔森 吴光辉[2] SHI Haiming;HUANG Zhangqi;WANG Chunxia;PENG Shusen;WU Guanghui(Nickel Smelting Plant,Jinchuan Group Co.Ltd.,Jinchang 737100,China;School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]金川集团股份有限公司镍冶炼厂,甘肃金昌737100 [2]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《电镀与精饰》2021年第3期15-20,共6页Plating & Finishing

基　　金：校企合作项目(Hk201801112)。

摘　　要：为了维持企业现有电镀镍工艺范围,降低镍阳极溶解的残渣率,节约生产成本,对镀镍工艺进行了优化与性能调控。采用阳极极化曲线、计时电位法研究镀液组分浓度及工艺参数对镍阳极极化曲线的致钝电流密度影响规律,并对镀液进行调控。采用金相显微镜和扫描电子显微镜(SEM)观察镍阳极溶解的宏观、微观形貌。采用连续电化学溶解法计量残渣量,中性盐雾实验法评价镀层的耐蚀性。C工艺下镍阳极的致钝电流密度i_(pp)为0.490 A/dm^(2),电极电位为-0.2286 V,阳极的溶解较均匀,未发现明显的孔洞,残渣率为0.793%,获取的镀层结晶细致。C工艺的致钝电流密度提高,电极电位下降,残渣率明显降低,且镀层的耐蚀性基本未改变。In order to maintain the current nickel electroplating process scope,reduce the residue rate of nickel anode dissolution and corresponding production costs,the nickel plating process has been optimized.Anodic polarization curve and chronopotentiometry were used to study the influence of the concentration of various components of the plating solution and the process parameters on the blunt current density of the nickel anode polarization curve,and the plating solution was regulated according to this law.Metallographic microscope and scanning electrons were used to observe the macro and micro morphology of nickel anode dissolution,and X-ray diffractometer(XRD)was used to analyze its composition.The residue was measured by continuous electrochemical dissolution method,and the corrosion resistance of the coating was evaluated by neutral salt spray test.The blunt current density of the regulated nickel anode of the nickel plating C was 0.490 A/dm^(2),the electrode potential was-0.2286 V,the anode dissolution was uniform,no obvious holes were found,and the residue rate was 0.793%.After the adjustment,the blunt current density of the C plating process was increased,the electrode potential was reduced,the residue rate was significantly reduced,and the corrosion resistance of the coating was not changed.

关 键 词：电解镍 致钝电流密度 阳极溶解 残渣率 

分 类 号：TQ151.6[化学工程—电化学工业]