Electro Deposition Coating
Electro Deposition Coating
Electro Deposition Coating
Electrolysis |
A phenomenon in which an irreversible reaction occurs by applying electrical energy to an aqueous solution. Water is decomposed into hydrogen and oxygen at each electrode, that is, the cathode and anode, and H⁺ and OH⁻ are formed at the interface of the electrodes. The gas generated in the electrode eventually inhibits the deposition of the coating film and affects the appearance quality, etc. So energy supply plan must be devised. |
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Electrophoresis |
A phenomenon in which paint particles (+charge) and other charged particles dispersed in water in an aqueous solution move to an electrode with opposite charge under an electric field. |
Electro Deposition |
Paint particles move to the cathode by electrophoresis, and a coating film is deposited on the cathode. The precipitated coating reacts with OH⁻ formed by electrolysis to form a water-insoluble coating. Paint particles charged with H⁺ react with OH⁻ on the electrode to generate H₂O and dehydrate in the coating film By forming a water-insoluble coating film, the electrochemical reaction of the electrodeposition paint is terminated. |
Electro Endosmosis |
Water-insoluble coating and liquid coating are mixed on the cathode, and moving water is washed as a post-process. At this time, the water-insoluble film is not affected by washing with simple water to remove and recover the embedded paint by surface tension. |