The surface treatment of stainless steel rivets is treated by mechanical and chemical methods to impart a beautiful surface and anti-corrosion effect to the surface of the product, and a protective layer for protecting the body can be formed on the surface of the product. The surface treatment method by forming a cover layer on the surface of fasteners such as rivets is usually attributed to the following two methods:
1. Electroplating: The plated stainless steel rivet member is immersed in an aqueous solution containing the deposited metal compound, and an electric current is passed through the plating solution to cause the plating metal to be deposited and deposited on the member. Generally, electroplating is performed by galvanizing, copper, nickel, chromium, copper-nickel alloy, etc., and boiled black (blue), phosphating, and the like are sometimes included.
2. Hot dip galvanizing: This is accomplished by immersing the carbon steel component in a plating bath of molten zinc at a temperature of about 510 °C. The result is that the iron-zinc alloy on the surface of the steel piece gradually becomes passivated zinc on the outer surface of the product. Hot dip aluminizing is a similar process.
The plating metal is not uniformly deposited on the peripheral edge during plating, and a thicker coating is obtained at the corner. In the threaded portion of the fastener, a relatively thick coating is located on the crest of the thread, gradually thinning along the side of the thread, and depositing thinner at the bottom of the tooth, while hot dip galvanizing is just the opposite, thicker coating is deposited inside the corner and At the bottom of the thread, the mechanical plating of the plated metal tends to be the same as that of hot dip coating, but it is smoother and much more uniform over the entire surface.