Aluminum alloy stamping parts have the characteristics of low density, good electrical and thermal conductivity, and good corrosion resistance. Aluminum alloy surface treatment can meet the corrosion resistance, wear resistance, decoration or other special functional requirements of the product. The commonly used surface treatment of aluminum alloy includes spraying, baking paint, electroplating, anodizing, infiltration, oil spraying and sandblasting.

1. Spraying: It is to use pressure or electrostatic force to attach paint or powder to the surface of the workpiece, so that the workpiece has anti-corrosion and appearance decoration.
2. Baking paint: primer and topcoat are applied to the substrate, and each time the paint is applied, it is sent to a dust-free constant temperature baking room for baking.
3. Plating: the use of electrolysis to make the metal or other material parts of the surface attached to a layer of metal film process. It can prevent corrosion, improve wear resistance, electrical conductivity, light reflection and improve appearance.
4. Anodic oxidation: electrochemical oxidation of metals or alloys. The metal or alloy parts as the anode, the use of electrolytic method to form an oxide film on the surface. The metal oxide film changes the surface state and properties,

Such as surface coloring, improve corrosion resistance, enhance wear resistance and hardness, protect the metal surface.
5. Immersion: the sealing medium (usually low viscosity liquid) through natural penetration (I. e. microporous self-absorption), vacuum and pressure and other methods into the micropores (slits), the gap is filled, and then through the natural (room temperature),

The sealing medium in the gap is solidified by cooling or heating to seal the gap.
6. Oil injection: spray the paint on the surface of the product and dry it naturally.
7. Sand blasting: it uses compressed air as the power to form a high-speed jet beam to spray materials (copper ore sand, quartz sand, emery, iron sand, sea sand) at high speed to the surface of the workpiece to be treated, so that the appearance or shape of the outer surface of the workpiece surface changes,

Due to the impact and cutting action of the abrasive on the surface of the workpiece, the surface of the workpiece has a certain degree of cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, thus improving the fatigue resistance of the workpiece, increasing the adhesion between it and the coating, extending the durability of the coating, and also conducive to the leveling and decoration of the coating.