Railway Fastener has many surface treatment methods and processing techniques according to the different requirements of their products. Such as painting, electroplating, chemical plating, vacuum plating, anodizing, sandblasting, hardening coating, vapor deposition, carburizing, etc.
1.Electroplating: it will dip the plating parts into the aqueous solution containing the deposited metal compound, discharge the electroplating metal and deposit on the components through the plating solution. It is easy to produce hydrogen embrittlement, which has great influence on the mechanical strength of the workpiece.
2.Hot-dip galvanizing: by immersing the carbon steel components in a bath of molten zinc at about 510 degrees. The iron and zinc alloy on the surface of steel gradually become the passivating zinc on the outer surface of the product. However, the high temperature in the hot plating, the steel is liable to produce bad effects of high temperature annealing.
3.Mechanical plating: with the action of mechanical energy generated by the rotation of the cylinder.
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