What are the functions of several surface treatments for Zinc Coated Steel Deep Drawing Stamping Housing Parts For Car Wheel?

Surface treatment of galvanized steel deep drawn stamped automotive wheel housing parts is important to enhance their performance, appearance and durability. Powder spraying uses electrostatic adsorption to evenly coat the powder coating on the surface of the wheel shell, and then solidifies it at high temperature to form a strong and durable coating. This treatment method can not only significantly improve the corrosion resistance and wear resistance of the wheel shell, but also give it rich colors and textures to meet diverse appearance requirements. Powder spraying is environmentally friendly and can reduce the emission of volatile organic compounds; at the same time, the coating has good adhesion and mechanical properties, and can effectively resist scratches and impacts.
Galvanizing treatment forms a dense zinc layer on the surface of the wheel shell to prevent direct contact between the base material and the corrosive medium, thereby significantly improving the corrosion resistance of the wheel shell. The galvanized layer can also enhance the hardness and wear resistance of the wheel shell to a certain extent. The nickel layer has high hardness and good corrosion resistance. Nickel plating can further improve the surface hardness and scratch resistance of the wheel shell, while giving it a silvery white luster and improving its aesthetics. Chrome plating can not only form a bright and hard chromium layer on the surface of the wheel shell to improve corrosion resistance and wear resistance, but also significantly improve the appearance grade and visual impact of the product. The chrome plating also has good reflective properties, helping to reduce light pollution.
Polishing removes roughness and imperfections from the surface of the wheel shell through mechanical or chemical methods, leaving the surface as smooth as a mirror. Polishing can not only improve the aesthetics of the wheel shell, but also improve its surface properties to a certain extent, such as reducing the friction coefficient and improving wear resistance. Anodizing is mainly used for surface treatment of aluminum alloy wheel shells. By applying voltage in the electrolyte solution, a dense and porous oxide film is formed on the surface of the aluminum alloy. This oxide film not only has good corrosion resistance and wear resistance, but can also obtain rich color effects through coloring treatment.
Spray painting treatment is one of the key steps in the surface treatment of automobile wheel housing parts. Its process details and effects have a profound impact on the final performance and appearance of the product. During the painting process, the wheel shell must first be thoroughly cleaned and pre-treated to remove oil, rust and oxide layers on the surface to ensure good adhesion of the paint. Subsequently, advanced spray gun technology is used to accurately control the spray pressure, spray distance and spray speed to evenly spray high-quality, highly weather-resistant paint on every corner of the wheel shell to form a dense and continuous coating.
During the hot-dip galvanizing process, the wheel casing is first preheated to the appropriate temperature and then completely immersed in molten zinc. Under the high temperature of the zinc liquid, the iron and zinc on the surface of the wheel casing undergo a chemical reaction to form a tightly bonded alloy layer. At the same time, the zinc liquid rapidly cools and solidifies on the surface of the wheel casing, forming a pure zinc layer. These two layers of structure together form a hot-dip galvanized layer with uniform thickness and strong adhesion, which can effectively resist corrosion attacks in various harsh environments.
The wire drawing process uses mechanical friction to form fine lines on the surface of the wheel shell, improving the texture and aesthetics of the product. At the same time, the brushing treatment can also enhance the wear resistance and anti-fingerprint performance of the wheel shell to a certain extent. Passivation treatment is to form a dense passivation film on the surface of the wheel shell through chemical methods to improve its corrosion resistance. The passivation film can effectively prevent corrosive media from eroding the base material, thereby extending the service life of the wheel housing.