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There are five kinds of surface treatment methods for the general aluminum shell, which are grinding and polishing, sandblasting, wire drawing treatment, anodic oxidation, electroplating electrophoresis and other mainstream methods.

1. grinding and polishing

Using mechanical, chemical or electrochemical methods, the surface roughness of the aluminum shell workpiece is reduced to obtain a bright and flat surface processing method.

Polishing process is mainly: mechanical polishing, chemical polishing, electrolytic polishing. The aluminum parts can be close to the stainless steel mirror effect after mechanical polishing + electrolytic polishing, giving a feeling of high-end simplicity and fashion in the future.

2. Sandblasting and polishing

The process of using the impact of high-speed sand flow to clean and coarsene metal surfaces. This method of aluminum shell surface treatment can make the surface of the workpiece to obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, so as to improve the fatigue resistance of the workpiece, increase the adhesion between it and the coating, extend the durability of the coating film, but also conducive to the flow and decoration of the coating.

3. drawing treatment

Metal drawing is the manufacturing process of repeatedly scraping the aluminum sheet out of the wire strip with sandpaper. Drawing can be divided into straight wire drawing, random wire drawing, spiral wire drawing, thread drawing.

The metal drawing process can clearly show every tiny wire trace, so that the metal matte will produce a fine hair luster, and the product has a sense of fashion and technology.

4. Anodizing

Aluminum shell is generally to go through this process, anodizing refers to the electrochemical oxidation of metal or alloy, aluminum and its alloy in the specific process conditions of the corresponding electrolyte, due to the action of external current, in the aluminum product (anode) on the formation of an oxide film process.

Anodizing can not only solve the defects of aluminum surface hardness, wear resistance and other aspects, but also extend the service life of aluminum and enhance the beauty, which has become an indispensable part of aluminum surface treatment, and is currently a very widely used and very successful process.

5. Electroplating electrophoresis

Electroplating electrophoretic treatment is the process of using the principle of electrolysis to plate a thin layer of other metals or alloys on some metal surfaces. It is the process of using electrolysis to attach a layer of metal film to the surface of metal or other materials to prevent metal oxidation (such as rust), improve wear resistance, electrical conductivity, reflective property, corrosion resistance and improve beauty.

The content described above is several commonly used surface treatment methods for aluminum alloy shells.

Using different surface treatment methods, the surface treatment effect obtained by the aluminum shell is not the same, we can choose the appropriate surface treatment method according to their actual needs.