Zinc alloy die casting is a common metalworking process. The process uses ultra-high pressure and high temperature to introduce molten zinc alloy material into a casting mold, which produces parts of different shapes and precise dimensions based on rapid cooling. In order to ameliorate various problems, electroplated surface treatment is essential.

Due to the chemical reaction between O2 and the surface of the zinc alloy material at high temperatures, zinc alloy die castings also produce a thin layer of oxide film. If not solved, the oxide film will affect the surface treatment effect, but also reduce the service life of zinc alloy material parts and aesthetics. In addition, zinc alloy die casting surface generally has many problems, such as not smooth, uneven, etc., all kinds of problems will obviously reduce the visual effect and quality of zinc alloy material parts.

Castings are parts that are primarily used to manufacture a wide variety of industrial equipment, electronics, vehicles, aerospace engineering, and other major industrial products. Castings not only in plastics and rubber have some not easy to achieve the type of structure, but also in certain reaction conditions, aluminum, zinc, copper and other alloy products can be created with other forging process is different from the superior performance.

There are many factors that make casting surface treatment good, including the common ones: casting surface has out of air holes, loose and other uneven phenomena, surface roughness greatly reduces the quality of the surface coating; casting forging will have a certain state of rust, according to the spraying will cause secondary pollution; casting surface will have grease, dust and other stains. If not cleaned, after spraying can not achieve the actual effect of the purpose. Generally speaking, better surface treatment of castings needs to overcome these shortcomings.

At the level of spraying, castings with a high success rate of both package coating (topcoat) also includes passivation fluid, topcoat and other architectural coatings, especially spray paint drying technology, the coating can be changed from liquid to solid, can effectively avoid the surface spraying failure due to weathering layer and corrosion, reduce the frequency of coating and spraying corrosion concerns.

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