Description : Thus the fundamental principle of electrocoating is that materials with opposite electrical charges attract. An Electrocoat System applies a DC charge to a metal part immersed in a bath of oppositely charged paint particles. The paint particles are drawn to the metal part and paint is deposited on the part, forming an even, continuous film over every surface, in every crevice and corner, until the coating reaches the desired thickness. At that thickness, the film insulates the part and the attraction of paint particle stops and electrocoating is complete.