Aluminum alloy materials have the advantages of low density, low thermal expansion coefficient, high specific stiffness and specific strength. However, in the process of practical use, aluminum alloys show many problems such as low surface hardness, poor wear resistance and corrosion resistance. To a large extent, the application range of aluminum alloy is limited, so it is particularly important to improve the appearance function of aluminum alloy casing. The primary purpose of the exterior treatment of the aluminum alloy shell is to improve the anti-corrosion function, decoration function and functionality of the aluminum profile. So what are the methods for the exterior treatment of aluminum alloy shells?

　　1. Surface sandblasting and shot blasting

　　The process of finishing and roughening the metal surface with the impact effect of high-speed sand flow. The surface treatment of aluminum parts in this way can make the surface of the workpiece obtain a certain degree of cleanliness and different roughness, and improve the mechanical function of the surface of the workpiece, thereby improving the fatigue resistance of the workpiece and increasing the gap between it and the coating. The adhesive force extends the durability of the coating film, and is also conducive to the smooth flow of the coating. We often see this process in various products of Apple, and it is also used more and more by existing TV cabinets or middle frames.

　　2. Surface grinding and polishing treatment

　　 Use mechanical, chemical or electrochemical methods to reduce the surface roughness of the workpiece to obtain a bright and flat surface. The polishing process is mainly divided into: mechanical polishing, chemical polishing, and electrolytic polishing. The aluminum parts can be close to stainless steel mirror effect after mechanical polishing + electrolytic polishing, giving people a sense of high-end simplicity and fashionable future.

     3. Surface drawing treatment

　　Metal wire drawing is the manufacturing process of repeatedly scraping aluminum plates out of lines with sandpaper. Wire drawing can be divided into straight wire drawing, chaotic wire drawing, swirling wire drawing, and thread drawing. Metal processing WeChat, the content is good and worthy of attention. The metal wire drawing process can clearly show every slender wire mark, and then make the metal matte shine with fine hair luster, and the product has a sense of fashion and technology.

　　 4. Electroplating and electrophoresis treatment

It is the process of using the principle of electrolysis to plate a thin layer of other metals or alloys on the surface of some metals. It is the process of using the electrolysis effect to attach a layer of metal film to the surface of the metal or other materials and then prevent the metal from oxidizing (such as Corrosion), improve wear resistance, electrical conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and enhance beauty and other effects. The outer layer of many coins is also electroplated.

　　 5. Anodizing treatment

　　 Anodizing refers to the electrochemical oxidation of metals or alloys. Aluminum and its alloys form an oxide film on the aluminum product (anode) due to the effect of the applied current under the corresponding electrolyte and specific process conditions. Anodizing can not only deal with the shortcomings of aluminum surface hardness and wear resistance, but also extend the service life of aluminum and enhance its beauty. It has become an indispensable part of aluminum surface treatment and is currently the most widely used and very successful. Craft.

　　The surface treatment method of aluminum alloy shell is shared for us here. The selection of surface treatment for aluminum alloy shell can improve protection, decoration and functionality, overcome the shortcomings of aluminum alloy appearance and function, expand the scope of use, and extend the service life.