Electroplating, hot-dip galvanizing, and mechanical plating on the surface of Henan fasteners is the most common method to form a covering layer on the surface of the fasteners. After the surface treatment of the fasteners, they can appear more beautiful. The appearance of the fastener itself, the corrosion resistance of the fastener itself will also be improved.The more important purpose is to make the fastener itself obtain the anti-corrosion ability to increase the reliability and adaptability of the fastener. Therefore, the quality judgment of the surface treatment of the fastener is mainly to check the anti-corrosion ability of the fastener. Whether the increase is effective, and whether the increase is in line with the expected requirements.

　　1. Electroplating of Henan fasteners

　　The electroplating of fasteners refers to immersing the parts of the fasteners that need to be electroplated into a specific aqueous solution. The aqueous solution will contain some deposited metal compounds, so that after the current passes through the aqueous solution, the metal substances in the solution will precipitate and adhere to On the immersed part of the fastener.Electroplating of fasteners generally includes zinc, copper, nickel, chromium, copper-nickel alloys, etc.

　　2. Hot-dip galvanizing of Henan fasteners

　　Fastener hot-dip galvanizing is to immerse fasteners made of carbon steel into a molten zinc plating tank with a heat of about 510℃, so that the iron-zinc alloy on the surface of the fasteners will be converted into passivated zinc, thereby Obtain the surface treatment effect.The price of hot-dip galvanizing of fasteners is higher than that of electroplating, about 1.5 to 2 yuan per kilogram.

　　3. Mechanical plating of Henan fasteners

　　The mechanical plating of fasteners refers to the use of specific physical and chemical means to impact the surface of the fastener with the powder of the coated metal, so that the coated metal forms a coating on the surface of the fastener through cold welding to reach the surface Treatment effect.The mechanical plating of fasteners is mainly applicable to spare parts such as screws, nuts and washers.

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