Die casting surface treatment method

    Common surface treatments for aluminum die castings include electrophoresis, plastic spraying, painting, electroplating, and oxidation. These surface treatments can be divided into two categories according to the surface type: the material addition method of adding a metal coating or resin paint layer, including electrophoresis, plastic spraying, painting, electroplating, etc. The other is a denaturation method that changes the properties of the workpiece surface material, such as anodizing.

Introduction to surface treatment

1. Electrophoresis: A surface treatment process that uses an electric field to make paint particles with electrons adhere to the surface of the workpiece. It has good anti-rust and aesthetic effects, and the film thickness is 15-25um. The surface form is flat and glossy, and the color can be customized, with black being the most common.

2. Spraying: Spray powder or liquid paint onto the workpiece surface through high-pressure spraying to form a uniform solidified coating on the workpiece surface. It has good anti-rust and aesthetic effects. The film thickness is 50-150um. The surface forms include matte, glossy, wrinkled, etc. The surface form and color can be customized.

3. Electroplating: Use the principle of electrolysis to attach a layer of other metals to the surface of the workpiece to achieve aesthetics, rust prevention, mechanical properties, etc. The coating thickness is 5-8um. Common coating materials are zinc, nickel, chromium, copper, etc.

4. Anodizing: Under the action of electrochemical oxidation, an oxide film is formed on the surface of the workpiece, which can change the wear resistance, hardness, corrosion resistance and appearance color of the raw materials. The film thickness is 5-40um and can be adjusted according to requirements.