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　　These surface treatments for die-casting processing

　　In the context of commodity economy, there is a wide variety of zinc aluminum alloy die-casting parts available for consumers to choose from. The more intuitive factor is whether the outer surface of the die-casting part has sufficient attractiveness. The exquisite appearance of the outer surface provides the integrity of the product itself, allowing consumers to understand the product in a timely manner through its appearance and feel more at ease when making purchases. Therefore, the surface treatment of die-casting processing plays a very important role. What surface treatments are required during the die-casting process?

　　1) Passivation: This is an effective method to prevent the surface of zinc aluminum alloy die castings from being easily oxidized, thereby prolonging the corrosion rate of the metal;

　　2) Sandblasting: Its main function is to increase the surface roughness of die-casting parts, which is helpful for improving their adhesion.

　　3) Electrochemical oxidation: This can improve the hardness of die-casting parts, with good heat resistance, insulation and corrosion resistance, and good adsorption ability;

　　4) Coloring: Various processes can be used to color zinc aluminum alloys, forming different colors. For example, baking paint can be made into a matte color, electrophoresis can be made into black, and so on;

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