NS镀银自1976年4月投产以来,迄今已经过三年多的实践考验,证明它作为一种无氰镀银的新工艺是有其生命力的。但在生产中也反应出一些问题,归纳起来主要有两点:一是长期使用后镀层变粗;一是下铜,特别是滚镀。为了使生产正常进行,我们对以上问题从两方面进行了研究:一是对添加电镀中可能带入的各种杂 NS Silver has been in practice for more than three years since it was put into operation in April 1976 and has proved its vitality as a new cyanide-free silver plating process. But in the production also reflects some problems, summed up in two main points: First, the coating becomes thicker after long-term use; First, the next copper, especially barrel plating. In order to make the normal production, we have carried on the research to the above question from two aspects: First, to add the electroplating may bring various miscellaneous miscellaneous