Nickel underplating prevents the migration between tin or gold platings and the base material.

垫板镀镍可防止在镀锡或基料之移动。

Process of surface treatments include gold plating, silver plating ,nickel plating, chrome plating, tin plating, zinc plating, electrostatic painting, cataphoretic coating, aluminium oxidizing, etc.

表面处理（镀．银．镍．铬．锡．锌．静电喷涂．喷漆等）。