To the surface of the fastener to do plating, hot dip galvanizing, mechanical plating is the most common method, the surface of the fastener to form a coating process, fasteners after surface treatment, you can show a more beautiful Appearance, fasteners themselves anti-corrosion ability will be improved.
The main purpose is to make the fastener itself to obtain anti-corrosion ability to increase the reliability and adaptability of the use of fasteners, so the quality of the surface treatment of fasteners to judge, more mainly check the fastener corrosion resistance Whether it is effectively increased, and whether the increase is in line with the expected requirements.
The plating of the fastener means that the portion of the fastener that needs to be plated is immersed in a specific aqueous solution which contains some deposited metal compound so that the metal material in the solution precipitates and adheres to the metal compound after passing through the aqueous solution Fastener on the immersion part. The plating of fasteners generally includes galvanized, copper, nickel, chromium, copper-nickel alloys, and the like.
Hot-dip galvanizing of the fastener is the carbon steel component of the fastener immersed in the heat of about 510 ℃ to dissolve the zinc plating tank, so fasteners on the surface of the iron-zinc alloy will be converted to passivation of zinc, thus Get the surface treatment effect. Fastener hot dip galvanized treatment price is higher than the plating, about 1.5 to 2 yuan per kilogram.
Mechanical plating of fasteners means that the surface of the fastener is impacted by specific physical and chemical means to coat the surface of the fastener so that the coated metal forms a coating on the surface of the fastener by means of cold welding to the surface Processing effect. The mechanical plating of fasteners is mainly used for spare parts such as screws, nuts and washers.
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