Because of the punching after the incision site no tin layer, while most parts of surface layer of tin, the pretreatment process of adverse, removing tin layer will damage the substrate without removing the tin layer if not plating parts difficult to achieve uniform effect
Can electroplate.If the parts need tin plating, it is better not to use tinplate (tin plated steel / strip), galvanized steel plate / ordinary steel plate / strip with or without plating.
Galvanized steel / strip is easy to retreat, the damage to the substrate is very small, but also to ensure the production of rust in the stamping process, you can use.
