Definition of electrophoresis: Under the action of an electric field, a charged particle moves toward an electrode opposite to its electrical property, which is called electrophoresis (EP). The technique that uses charged particles to move at different speeds in an electric field to achieve separation is called electrophoresis. Principle of electrophoresis: Electrophoresis is the application of electrophoretic paint on the yin and yang poles. When the voltage is applied, the charged paint ions move to the cathode and react with the alkali generated on the surface of the cathode to form insoluble matter, which is deposited on the surface of the workpiece. Advantages of electrophoresis: 1. Safety and environmental protection. No fire danger, little harm to human body 2. The most complete and comprehensive anti-corrosion protection. Electrophoretic paint coating can make the inner cavity, welding seam, edge and other weak parts of the workpiece traditional coating method can also get good coating protection, so that the overall corrosion resistance of the product is significantly improved, and finally greatly extended The service life of the product improves the grade of the product. 3. The coating film is fine, uniform and flat, and has the best adaptability in products that require precision. 4. High production efficiency and utilization rate of electrophoresis. In short, the function of electrophoresis is to provide anti-corrosion protection to metal parts and to give them a certain degree of decorativeness.