What are the Surface Treatment Processes for Aluminum Workpiece?

■  Sand Blasting: refers to the process of cleaning and roughening the metal surface through the impact of high-speed sand flow. In order to obtain the workpiece surface with certain cleanliness and different roughness, aluminum parts are generally treated with this method. The mechanical properties of the workpiece surface can be improved, so as to improve the fatigue resistance of the workpiece. The adhesion between the workpiece and the coating is greatly increased, and the durability of the coating is prolonged, which plays a good role in the smoothness and decoration of the coating. This aluminum alloy process often appears in various apple products, and is increasingly used in the existing TV front cover or middle frame.

■  Polishing: mechanical, chemical or electrochemical methods are used to reduce the surface roughness of automotive aluminum parts, so as to obtain a bright and smooth surface processing method. Polishing process mainly includes mechanical polishing, chemical polishing and electrolytic polishing. After mechanical polishing + electrolytic polishing, the aluminum parts of the car can approach the mirror effect of stainless steel, giving people a high-grade, simple and fashionable feeling of the future (of course, it is easy to leave fingerprints, which needs more care).

■ Brushing: metal brushing is the manufacturing process of repeatedly scraping aluminum plate lines with sandpaper. The drawing pattern can be divided into straight line pattern, random pattern, spiral pattern and thread pattern. The metal brushing process can clearly show every small silk screen print, making the metal matte give off fine hair luster. The product has a sense of fashion and technology.

■  Anodizing: anodic oxidation refers to the electrochemical oxidation process in which aluminum and its alloys form an oxide film on aluminum products (anodes) under the action of external current under the corresponding electrolyte and specific process conditions. Anodizing can not only solve the defects of aluminum surface hardness and wear resistance, but also enhance the beauty of aluminum and prolong the service life of aluminum. It is a process often used in aluminum surface treatment, and it is also a widely used and successful process at present.