Three important methods of fastener surface treatment are introduced

The surface treatment of fasteners refers to the process of forming a covering layer on the surface of fasteners by some methods. After the surface treatment of fasteners, they can show a more beautiful appearance, and the corrosion resistance of fasteners themselves will also be improved.

1. Plating of fasteners

Electroplating of fasteners refers to immersing the part of the fastener that needs to be electroplated into a specific aqueous solution, which will contain some deposited metal compounds, so that after passing the current through the aqueous solution, the metal substances in the solution will precipitate and adhere to the immersed part of the fastener. The plating of fasteners generally includes galvanized, copper, nickel, chromium, copper-nickel alloy, etc.

2, hot dip galvanized fasteners

The hot dip galvanizing of fasteners is to immerse the fasteners of carbon steel components into a plating bath with a heat of about 510 ° C, so that the iron-zinc alloy on the surface of the fasteners will be transformed into passivated zinc, so as to obtain the surface treatment effect.

3, mechanical plating of fasteners

The mechanical plating of fasteners refers to the impact of the powder of the coated metal on the surface of the fasteners through specific physical and chemical means, so that the coated metal forms a coating on the surface of the fasteners through cold welding to achieve the surface treatment effect. Mechanical plating of fasteners is mainly suitable for spare parts such as screws, nuts and gaskets.

The surface treatment of fasteners, the main purpose is to make the fastener itself to obtain anti-corrosion ability, in order to increase the reliability and adaptability of the use of fasteners, so the quality of fastener surface treatment is mainly to check whether the anti-corrosion ability of fasteners is effectively increased, and whether the increase is in line with the expected requirements.