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Electroplating process
Electroplating process starts with carefully cleaning the fastener surface in alkaline detergent type solutions. It is than treated with acid,in order to remove any rust or surface scales. Thorough cleanliness is essential as the molecular layers of oil or rust can prevent adhension of the coating to the metal surface.
Electroplating is done by the process of electro deposition. The fasteners are dipped in a chemical bath containing dissolved zinc. When direct current is applied, the zinc metal at the anode begins to dissolve, and the free metalions reach the cathode to form a thin layer of coating on the fastener. The thickness of zinc plating depends on the time spent in the plating bath, the amount of electric current,and the chemical composition of bath.
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