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

垫板镍可锡或层与基料之的移动。

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

产品的表面处（．银．镍．铬．锡．锌．静电喷涂．喷漆等）。