Process
Cathodic electrodeposition of paint occurs when direct current is applied to positively charged resin micelles dispersed in water. The resin micelles migrate toward the cathode (transformer tank) and are deposited in a process known as electrophoresis. As the process continues, the thickness of the deposit builds, resistance increases, and the film reaches a thickness limit. The most accessible areas are coated first, but as the resistance increases, less accessible areas coat, producing a highly uniform film build. Two-coat cathodic electrodeposition is the application of two coats of paint (epoxy primer/acrylic urethane topcoat).
