Zinc alloy die casting parts plating quality is excellent.aluminum extrusions for screen enclosures

　　Zinc alloy die casting to do electroplating surface treatment, this link is very important, if the plating is not done well, then all the previous work is equal to wasted effort, so in the product plating link must pay attention to, then the plating quality is affected by those factors, die casting for you as follows:

　　First, the selection of zinc alloy die casting raw materials must choose regular national standard material for product die casting.

　　Second, the design of zinc alloy die-casting parts should be reasonable, the shape of the die-casting parts should be considered to cover the ability of electroplating, and the hole should be cut as far as possible, so that it is not easy to wash with the solution. Reduce the sharp corners and other parts, so that the power line distribution is uniform during electroplating.

　　Third, die casting process, die casting mold design is reasonable, so that the die casting does not occur shrinkage, pinhole and loose and other shortcomings, the above shortcomings will directly affect the coating binding force.

　　Fourth, zinc alloy die casting parts in the production process, as far as possible to reduce segregation phenomenon. Such as some parts of aluminum segregation, in degreasing, aluminum is mainly dissolved, will occur in the appearance of die casting pores, pinholes and can not be washed, forming a poor binding force, resulting in coating peeling and foaming.

　　Fifth, the grinding and polishing process should pay attention to grasp the sense of proportion, the fine layer of 0.05 ~ 0.1mm formed in the cooling process of the surface of the die casting is very important for electroplating, grinding and polishing should try to reduce the loss of the fine layer, if the layer is worn away, the exposed will be a porous structure, in this layer will not get good electroplating.

　　Six, composed of multiple kinds of copper-nickel-chromium plating, relative to the substrate is a negative plate coating, as long as the mechanical maintenance effect, and zinc alloy parts in the humid air corrosion, so it is necessary to ensure that the coating without holes. Otherwise, corrosion products of zinc alloy will cause the coating to bubble. Compared with steel parts, the coating should be thicker, so that it can be applied to zinc alloy die casting parts.

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