Several common problems in alkaline tin plating on copper foil were listed, for example, the golden yellow passivation film on anode (tin latten) becomes thin, black, and even disappears;

• 列举了紫铜箔碱性镀锡过程中出现的几种常见问题,如:阳极(锡板)表面金黄色钝化膜变淡(或消失)甚至变黑,镀层呈暗灰色海绵状等。