An intermediate layer was formed by the pretreatment method.The process and solution of degrease, alkali erosion, brightening pretreatment and pre-electroplating were introduced.

• 介绍了铝及其合金制件的脱脂、碱蚀、出光及预镀等预处理工艺和配方,探讨了浸锌-镍合金溶液的配制、温度及时间对镀层性能的影响。