What is the surface treatment method of fasteners? It is a method of forming a covering layer on the surface of the fastener by certain means.

The first is the blackening of fasteners. This is a modern environmentally friendly blackening. Through the tempering waste heat of the fasteners, a black polymer material protective film is formed according to the thermal polymerization reaction mechanism to achieve corrosion and rust prevention. the goal of.

The second is fastener electroplating, that is, the fastener or part of the fastener that needs to be electroplated is immersed in a specific aqueous solution, and the deposited metal compound contained in the aqueous solution precipitates or adheres to the entry part of the fastener, thereby forming Covering layer.

The third type is hot-dip galvanizing. This is mainly for fasteners of carbon steel. Immerse them in a molten zinc plating tank with a heat of about 510℃. The iron-zinc alloy on the surface of the fasteners is converted into passivated zinc. , The surface treatment is complete.

The fourth type is mechanical plating. The powder of the plated metal is applied to the surface of the fastener. The plated metal forms a coating on the surface of the fastener by cold welding to achieve the required effect of surface treatment. It is suitable for screws, nuts and nuts. Gasket etc.