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List the three most commonly used methods for the surface treatment of fasteners.
Apr 15, 2018

For fasteners, surface electroplating, hot-dip galvanization, mechanical plating is the most common use of methods, on the surface of fasteners to form a coating process, fasteners, after surface treatment, can present a more beautiful appearance, fasteners itself anti-corrosion ability will be improved. Main purpose is to make more fasteners for the anticorrosion ability, in order to increase the reliability of the fasteners used and adaptability, thus judgment about the quality of the fasteners, surface treatment, more mainly check whether fasteners, anti-corrosion ability effectively increase, and increase the size of the conformed to the expected requirements.

1. Plating of fasteners.

Electroplating fasteners refers to will need to be plated parts fasteners into particular solution and will contain some deposit metal compounds in aqueous solution, so that in the current through the aqueous solution, a solution of metal material separation and attached on the immersed part of the fasteners. The electroplating of fasteners generally includes galvanization, copper, nickel, chromium, copper-nickel alloy and so on.

2. Hot dip galvanization of fasteners.

Fasteners of hot dip galvanizing is the composition of carbon steel fasteners permeated the heat which is about 510 ℃ melting zinc plating slot, such fasteners on the surface of the zinc alloy will shift as passivation of zinc, iron surface treatment effect is achieved. The price of hot dip galvanizing for fasteners is higher than electroplating, about 1.5 to 2 yuan per kilogram.

3. Mechanical plating of fasteners.

Fasteners, mechanical plating is to point to by specific physical and chemical means, with powder coating metal, impact to the surface of the fasteners, so passed the form of cold welding, plating metal in fasteners, surface coating, surface treatment. The mechanical plating of fastener is mainly applicable to spare parts such as screws, nuts and gaskets.


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