The metal surface treatment process is as follows: ① Anodic oxidation: through the electrochemical principle, the aluminum oxide film is formed on the surface of aluminum and aluminum alloy, which is suitable for the surface treatment of aluminum and aluminum alloy; ② Electrophoresis: simple treatment, pretreatment - electrophoresis - drying, suitable for stainless steel and aluminum alloy materials; ③ PVD vacuum plating: using the technology of depositing thin film in the logistics process, it is suitable for metal ceramic coating; ④ Spraying powder: powder coating is applied to the surface of the workpiece through powder spraying equipment, which is often used for building furniture products and heat sinks; ⑤ Electroplating: improve the wear resistance and beauty of the workpiece by attaching a metal film to the metal surface; ⑥ Polishing: mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, fluid polishing and magnetic abrasive polishing, which can reduce the surface roughness of the workpiece by mechanical, chemical or electrochemical effects.

In the above metal surface treatment and polishing processes, the magnetic abrasive polishing method not only has high polishing efficiency and good grinding effect, but also has simple operation. The materials that can be polished include: gold, silver, copper, aluminum, zinc, magnesium, stainless steel and other metal precision small parts. It should be noted that iron is magnetic material, which cannot achieve the expected effect of cleaning.