Car right rear door sheet metal assembly - electrophoretic action
The electrophoretic action of the sheet metal assembly of the right rear door of the automobile mainly includes the following aspects :
Improved corrosion and wear resistance : Electrophoretic treatment works by forming a uniform coating on the surface of the sheet metal, which is about 10 times denser than the pure material and has extremely high wear and corrosion resistance. This can effectively protect the surface of the sheet metal from oxidation and corrosion, thereby extending its service life .
Improve appearance quality and surface finish : After electrophoretic treatment, the surface coating of sheet metal parts has uniform thickness, high appearance quality, good surface finish, and strong scratch resistance. This makes the sheet metal surface appear more smooth, bright, durable, to meet the needs of high-end decoration .
Construction of protective barrier : electrophoretic coating has high adhesion and density, which can form a solid protective layer on the surface of sheet metal parts, prevent the external environment from encroachment and damage to sheet metal parts, protect sheet metal parts from oxidation and corrosion .
The principle of electrophoretic processing is to disperse a positively charged colorant in water and attach it to a negatively charged sheet metal surface by the action of an electric field. The colorant molecules moving in water are affected by electric field and the direction of travel is perpendicular to the direction of electric field. When the molecules move to the surface of the sheet metal, they are bound to the surface under the action of an electric field to form a uniform colored layer, thus completing the electrophoresis process .
The application of electrophoresis technology in automobile manufacturing is very wide, especially in the process of automobile body painting, the way of charging after groove to ensure uniform coating. Due to the large area and gray color of the body, electrophoretic coating can effectively avoid the generation of step marks. In order to control current shock and protect the power supply system, the segmented power-on strategy is adopted. Electrophoretic coating not only improves the beauty of the metal surface, but more importantly provides a solid protective layer, greatly improves the corrosion resistance of the metal, and significantly extends the service life of the automobile .
Auto Right Rear door sheet metal Assembly - Electrophoresis refers to the process of electrophoretic treatment of the auto right rear door sheet metal assembly. Electrophoresis is a special coating technology, through the action of electric field force, the coating particles are deposited on the surface of the metal to form a uniform primer. This primer is usually black or gray, and its primary function is to provide corrosion protection rather than aesthetic effect .
Principle and procedure of electrophoresis process
Electrophoretic process uses applied electric field to make pigment and resin particles suspended in the electrophoretic solution migrate and deposit on the metal surface. Specific steps include:
Pretreatment : Remove impurities and contaminants from the surface of the workpiece.
electrophoretic treatment : uniformly deposit metal ions on the surface of the workpiece to form a coating.
aftertreatment : including the steps of cleaning, drying, testing and packing .
Application scenarios and advantages of electrophoresis technology
Electrophoretic process is widely used in primer coating of auto parts, auto vehicles and various metal products because of its excellent anti-corrosion properties. Compared with traditional spraying methods, the electrophoresis process can significantly extend the service life of metal products, and the coating is uniform, and the corrosion resistance is stronger .
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