电镀是阳极金属“溶解”的电解。 怎样才能让学生观察到锌在阳极“溶解”,怎样保证阴极铁片上出现牢固致密的灰白色镀锌层,怎样使灰白色的镀锌层经钝化得到亮黄色镀彩是该项实验中必须解决的三个课题。 Electroplating is electrolysis of the “dissolved” anode metal. How can we allow students to observe the “dissolution” of zinc at the anode and how to ensure a solid dense gray galvanized layer on the cathode iron sheet. How to make the gray galvanized layer passivated to give a bright yellow plating color must be solved in this experiment Three topics.