What are the surface treatment methods for non-standard bolts?

1. Mechanical plating: By coating metal particles and cold welding the coating to the product surface, it affects the product surface.
2. Electroplating: Soak the electroplated parts in an aqueous solution containing deposited metal compounds, use current to pass through the electroplating tank to precipitate the electroplated metal, and deposit it on the component. Generally, electroplating is zinc plating, copper, nickel, chromium, copper-nickel alloy, etc., sometimes black (blue), phosphating, etc.
3. Hot-dip galvanizing: Carbon steel parts are immersed in a molten pool with a temperature of approximately 510°C. As a result, the zinc-iron alloy on the surface of the steel part gradually turns into passivated zinc on the outer surface of the product. Hot dip aluminizing is a similar process.