Surface Treatment Requirements:

Process Flow: Rough Casting → Degreasing → Rust Removal → Surface Adjustment → Phosphating → Drying → Electrostatic Powder Coating → Curing → Packaging

2. Surface treatment uses electrostatic powder coating with epoxy resin, with a coating thickness of 60~80 micrometers.

3. The electrostatic powder coating adhesion meets the standard requirements.

4. Hardness (wear resistance) is over 100 times that of ordinary nitrocellulose paint, meaning it shows no scratches after a 2H pencil test.

5. Corrosion resistance (hydrochloric acid test) GB1771-91 greater than 500 hours.