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    Home > Coatings News > Paints and Coatings Market > Coating classification: electrophoretic paint

    Coating classification: electrophoretic paint

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: electrophoretic paint, also known as electrophoretic paint

    With the emergence of defects in conventional spraying, electrophoretic coating has become more and more popular

    Electrophoretic paint has also been constantly updated, from anode electrophoretic paint to cathode electrophoretic paint, from single component electrophoretic paint to two-component electrophoretic paint

    The development of electrophoretic paint also promotes the development of electrophoretic coating, so that more and more products no longer use spraying technology but use electrophoretic paint

    The electrophoretic coating consists of water-soluble resin, pigment, filler, additive, solvent and neutralizer

    The principle of electrophoretic paint technology is as follows: 1

    Electrophoresis is one of the most effective methods for coating metal parts

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    With the emergence of defects in conventional spraying, electrophoretic coating has become more and more popular

    Electrophoretic paint has also been constantly updated, from anode electrophoretic paint to cathode electrophoretic paint, from single component electrophoretic paint to two-component electrophoretic paint

    The development of electrophoretic paint also promotes the development of electrophoretic coating, so that more and more products no longer use spraying technology but use electrophoretic paint

    The electrophoretic coating consists of water-soluble resin, pigment, filler, additive, solvent and neutralizer

    The principle of electrophoretic paint technology is as follows: 1

    Electrophoretic paint is one of the most effective methods for painting metal parts

    Electrophoretic coating is a kind of special coating method, in which the conductive coating is immersed in a tank filled with water and diluted with a relatively low concentration as an anode (or cathode), and a corresponding cathode (or anode) is set in the tank

    After a period of DC power is connected between the two poles, a uniform, fine and insoluble coating film is deposited on the surface of the coating

    2

    There are four chemical and physical changes in the process of electrophoretic coating: electrolysis, electrophoresis, electrodeposition and electroosmosis

    (1) Electrophoresis: under the action of electric field, the charged colloidal particles will swim towards the opposite charge electrode, which is called electrophoresis

    (2) Electrolysis: electrolysis refers to the decomposition of any conductive liquid when it is electrified

    For example, in an aqueous solution with a conductive medium, under the condition of direct current, oxygen is generated on the anode surface and metal dissolution occurs

    The phenomenon of hydrogen reduction and metal precipitation on the cathode surface is called electrolysis

    (3) electrodeposition: during electrophoretic coating, the charged particles (resin, filler and material) arrive at the opposite charged electrode under the action of electric field, neutralized by H (anode electrophoresis) Oh (cathode electrophoresis), and become water-insoluble film

    The film is very stable and uniform

    This process is called electrodeposition

    (4) Electroosmosis: the reverse process of electrophoresis

    If the electrodeposited particles adhere to a certain position, they do not move with the action of the electric field, and the dispersion medium moves in the opposite direction of its movement in the loose particles

    This electrochemical process causes the solvent to leach out and the mechanical bond of the electrodeposited film is strengthened

    This process is called electroosmosis

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