用于特殊电镀行业的含硫活性镍扣的制备

考察了电解液中掺硫剂TS、添加剂SB的质量浓度及电流密度等关键因素对镍扣含硫量和产品物理外观的影响,研究了1#电解镍与含硫镍扣产品电化学活性的区别,确定了采用硫化镍可溶阳极电解制备含硫活性镍扣的工艺和最佳技术参数.最佳技术参数为:掺硫剂TS的质量浓度7.53 mg·L-1、添加剂SB的质量浓度36.97 mg·L-1）、平均表观电流密度1300 A·m-2,其他技术参数与电解镍生产技术参数相同.在上述条件下制备出的含硫镍扣,外表光亮,形状规则,硫的质量分数在0.01%~0.03%之间.其电化学活性较强,化学成分也均符合1#电解镍的要求.该工艺目前已应用于工业生产,产品可以满足精密电镀行业所需特殊电镀阳极的需求. 

Preparation of activated nickel buttons with sulphur for anodic materials in the special plating industry

Experiments were performed to investigate the effects of the key factors such as the mass concentrations of adding sulfur agent TS and additive SB as well as current density on the sulphur content and physical appearance of nickel buttons. Differences in electrochemical activity were analyzed between the 1# electrolysis nickel and the products of activated nickel buttons. The process and the optimum parameters of adopting the soluble anode electrolysis with nickel sulfide were decided for developing the activated nickel buttons by experiment. The optimum technological conditions were obtained as follows:the mass concentrations of adding sulphur agent TS and additive SB are 7.53 mg·L-1 and 36.97 mg·L-1 respectively, the average apparent current density is 1300 A·m-2, and other technological parameters are the same as those of the 1# electrolytic nickel. Nickel buttons with smooth surface and regular shape were developed at the parameters above, which contain sulphur from 0.01% to 0.03%. The products possess high electrochemical activity, and their chemical composition accords with the requirements of the 1# electrolysis nickel. The technology has been used in industry, and the products meet the requirements of special plating anodes for the precision electroplating industry.