The surface treatment of anchor bolt fasteners refers to the whole process of forming coverage on the surface of fasteners in a certain way. After surface treatment, the appearance of the fastener is more beautiful and elegant, and the corrosion resistance of the fastener itself is improved. There are several surface finishes for fasteners. 1. Electroplating of fasteners: Electroplating of fasteners refers to infiltrating the components that must be electroplated into a special saturated solution with some accumulated metal compounds. After applying an electric current to the solution, the metallic substance in the saturated solution deposits and adheres to the penetrated part of the fastener. The electroplating of fasteners usually contains hot-dip galvanized, copper, nickel, chromium, copper-nickel alloy, etc. 2. Hot-dip galvanizing of fasteners: The hot-dip galvanizing of fasteners is to infiltrate fasteners made of carbon steel into a molten zinc hot-dip galvanizing bath with a temperature of about 510 ° C, so that the surface of the fasteners The iron-zinc alloy material is changed to passivated zinc, so as to realize the surface treatment effect. The price of hot-dip galvanizing for fasteners is higher than that of electroplating, about 1.5 to 2 yuan per kilogram. 3. Electroplating of mechanical equipment for fasteners: electroplating of mechanical equipment for drilling anchor bolt fasteners. It means that the surface of the fastener is impacted by the coated metal powder through corresponding physical and chemical methods, so that the coated metal material is sprayed and welded on the surface of the fastener. Form a coating to complete the surface treatment effect. Mechanical equipment plating of fasteners is critical for screw, nut and washer fittings. The specific goal of the surface treatment of perforated anchor bolts is to make the fastener itself have corrosion resistance, thereby improving the stability and adaptability of the fastener. Therefore, Maijin pointed out that the quality judgment of the surface treatment of fasteners is mainly to check whether the anti-corrosion ability of fasteners is reasonably improved, and whether the increase is in line with expectations.