Electrophoretic paint: an advanced coating technology

Electrophoretic paint, also known as electrophoretic coating, is an advanced technology widely used in the coating of metal workpieces. This type of coating forms a uniform, dense, and water-insoluble coating on the surface of the coated object through electrophoretic coating method. Since its industrial application in the 1960s, electrophoretic paint technology has undergone multiple updates and upgrades, from the initial anodic electrophoretic paint to the current cathodic electrophoretic paint, as well as single component and two-component electrophoretic paints, greatly improving the coating effect and environmental performance. The principle of electrophoretic paint

The electrophoretic coating process involves four chemical and physical changes: electrolysis, electrophoresis, electrodeposition, and electroosmosis. During electrophoresis, charged colloidal particles move towards the electrode with opposite charges under the action of a direct current electric field, and deposit on the surface of the electrode to form a coating. Due to the use of water-soluble or water dispersible ionic polymers as film-forming agents in electrophoretic coatings, there is almost no harmful solvent evaporation during the coating process, making it environmentally friendly. Classification of electrophoretic paints

Electrophoretic paint can be mainly divided into anodic electrophoretic paint and cathodic electrophoretic paint. Anodic electrophoretic paint is commonly used for the protection of aluminum products, while cathodic electrophoretic paint is widely used for the coating of hardware such as automobiles and household appliances. Cathodic electrophoretic paint is further divided into epoxy electrophoretic paint, acrylic electrophoretic paint, and polyurethane electrophoretic paint, each with its unique properties and application scenarios.