What are the surface treatment methods for non-standard bolts

In the production process of non-standard bolts, it is very important to do a good job of surface treatment. What is the surface treatment method in the production of non-standard bolts? Now let's get to know each other< br> 1. Mechanical plating: by coating metal particles and cold welding the coating to the product surface, the product surface is affected< br> 2. Electroplating: immerse the plated part in an aqueous solution containing the deposited metal compound, use a current to precipitate the plated metal through the plating tank, and deposit it on the element. General electroplating is zinc plating, copper, nickel, chromium, copper nickel alloy, and sometimes black (blue), phosphating, etc< br> 3. Hot dip galvanizing: immerse carbon steel parts in the molten pool with a temperature of about 510 ℃. As a result, the zinc iron alloy on the surface of the steel part gradually becomes the passivated zinc on the outer surface of the product. Hot dip aluminizing is a similar process< br> Therefore, non-standard bolts need to choose appropriate surface treatment methods according to the actual situation to ensure their good performance< br>