Surface Treatment Methods and Techniques for Aluminum Alloy Stamped Parts

Aluminum alloy stamped parts are favored for their low density, good electrical and thermal conductivity, and corrosion resistance. To meet requirements for corrosion resistance, wear resistance, decoration, or other special functions, aluminum alloys commonly undergo various surface treatments. Below are common surface treatment techniques and their purposes:

1. Coating: Apply paint or powder to the part surface using pressure or electrostatic force to achieve corrosion protection and decorative finishes.

2. Baking paint: Apply primer and topcoat, then bake in a dust-free constant-temperature oven to improve durability and appearance.

3. Electroplating: Deposit a metal film on the surface via electrolysis to provide corrosion protection, increased wear resistance, and improved appearance.

4. Anodizing: Use electrochemical oxidation to form an oxide film on the metal surface, improving corrosion resistance, wear resistance, and surface hardness.

5. Impregnation: Fill micro-holes with a sealing medium and cure it to achieve gap sealing.

6. Oil spraying: Spray paint on the product surface and allow it to air-dry.

7. Sandblasting: Use compressed air to propel abrasive onto the part surface to improve mechanical properties, enhance fatigue resistance and coating adhesion, extend coating durability, and improve decorative effects.