Aluminum alloy die castings have become an ideal choice that balances aesthetics and durability, thanks to their excellent compatibility with surface treatments. This characteristic stems both from the chemical activity of die-cast aluminum materials and their dense surface structure, enabling them to adapt to various treatment processes, while improving the appearance texture and significantly enhancing corrosion resistance.

In terms of compatibility with surface treatments, aluminum alloy die castings exhibit a "versatile" trait. The anodizing process can form a 5-20 micron oxide film on their surface. By adjusting electrolytic parameters, various metal textures such as silvery white and bronze can be achieved, and the film hardness reaches HV300-500, with wear resistance 3 times higher than that of untreated castings. After the aluminum alloy motor shell of a new energy vehicle is treated with hard anodizing, it not only presents a delicate matte metallic color but also passes a 500-hour salt spray test in humid environments, far exceeding the industry standard of 200 hours.

The electroplating process enables die castings to achieve "metal texture upgrading". Through multi-layer electroplating (pre-copper plating → nickel plating → chrome plating), a mirror effect can be formed on the surface of die-cast aluminum, with a glossiness of over 90GU, which is often used in high-end bathroom accessories. More importantly, the low porosity (≤2%) of die-cast aluminum ensures that the coating adhesion reaches more than 5N/cm2, solving the problem that traditional sand-cast parts are prone to blistering during electroplating. According to the production data of an intelligent door lock manufacturer, the scratch resistance of die-cast aluminum panels treated with electroplating is 80% higher than that of plastic panels, and the service life is extended to more than 5 years.

For industrial scenarios requiring corrosion resistance, the spraying process is an efficient choice. Powder coating can form a 60-80 micron coating on the surface of die castings. Through fluorocarbon resin materials, it achieves weather resistance from -40℃ to 120℃. In the application of outdoor lamp housings, it can resist fading caused by ultraviolet aging. Electrophoretic coating, on the other hand, covers the complex cavities of castings with a coating uniformity of 0.1 microns. After the die-cast aluminum control handle of a construction machinery is treated with electrophoresis, its salt spray resistance is increased from 48 hours of the bare part to 720 hours, meeting the needs of high-corrosion environments such as mines.

This strong compatibility is also reflected in process combinations: spraying clear paint after anodizing can retain both metallic texture and weather resistance; combining a nickel plating layer with passivation treatment can form a double anti-corrosion barrier. From the delicate wire drawing of smartphone middle frames to the anti-rust coatings of container corner fittings, aluminum alloy die casting, with its "customizable" surface treatment capabilities, strikes a perfect balance between product appearance and durability, becoming a cost-effective and functional preferred solution in the manufacturing industry.