After the aluminum product is processed, there is no smooth and perfect surface, and the oxidation speed is rapid. Because the aluminum product needs to be improved at the time, the appearance must be enhanced, so the corresponding surface treatment of the aluminum product can achieve the desired effect. And because the aluminum characteristics are soft, the abrasion resistance is poor and the sandblasting machine uses compressed air as the power (shot blasting machine for Aluminum use of centrifugal shot wheel turbines), and uses a pneumatic source high-speed jet to spray sand and abrasives onto the surface of the workpiece. Because aluminum products are soft and easy to collide, the sandblasting machine sprays will cause collisions, so it is not suitable for aluminum to clean up.
Use of chemical pickling is not only highly corrosive, but also has a high level of damage from the perspective of environmental protection. The shot blasting equipment adopts high-speed projection to achieve the corresponding roughness on the surface of the aluminum product, which provides the fatigue resistance of the workpiece, and is more conducive to the leveling and decoration of the coating. At the same time, it can also remove the oxide scale on the surface of the aluminum product and improve the service life and surface stress of the workpiece, shot blasting machines are commonly used for aluminum surface cleaning.
The surface treatment of the oxide film produced by the shot blasting on the surface of aluminum products has decorative effects, protective properties and special functions, which can improve the electrical conductivity, heat conduction, wear resistance, corrosion resistance and optical properties of aluminum products. According to the process practice, it is proved that the shot blasting machines replaces the chemical (acid or alkali) of the traditional processing, and improves the corrosion resistance of the surface of aluminum products, and the service life is longer.
Therefore, domestic and foreign researchers used various methods to surface treatment to improve its comprehensive performance, and made great progress. At present, the cleaning process of shot blasting machines has been widely used in construction, aviation and military fields.