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Definition of ED coating
dgkede
2025-06-20
ED coating is a special method of film formation, which is suitable for special (water-soluble or water lotion) coatings (ED coatings for short) different from general coatings.
It is a coating method in which a conductive coating is immersed in a low concentration ED coating tank solution diluted with water as an anode (or cathode), and a corresponding cathode (or anode) is set up in the tank. A direct current is applied between the two poles for a certain period of time, and a uniform, water-insoluble coating film is deposited on the coating.
2. Main characteristics of ED coating
(1) ED coatings can completely dissolve and emulsify in water, and the viscosity of the formulated solution is very low, similar to water. It is easy to penetrate the bag like structure and gaps of the vehicle body (coated object) in the solution.
(2) The ED bath has high conductivity, and the coating particles can swim actively. However, the conductivity of the wet coating film deposited on the coated object is low. As the wet coating film thickens, its resistance increases, and when it reaches a certain resistance value, it no longer electrodeposits; Based on these two points, ED coating has good permeability and can generate a relatively uniform coating film.
The process's ability to coat complex shapes makes it particularly useful for components with intricate designs, ensuring complete and uniform coverage.REPORT