Painting by ED COATING (cataphoresis) is a painting treatment capable of giving elements in iron, steel and other alloys (current conductors) considerable resistance to corrosion; it is characterized by the uniform deposition of an epoxy or acrylic resin on the surface of the element, ensuring for a long time a high protection against chemical agents and other types of attacks, also allowing better adhesion of the finishing paints. Acrylic resin differs from epoxy because it can remain in direct contact with atmospheric agents while maintaining its technical characteristics. This treatment ensures greater protection against rust.The procedure consists in immersing the pieces, connected to the negative pole of an electric generator, in a tank where some electrodes connected to the positive pole are also immersed. The electric field and the electrochemical phenomena that develop determine the deposition on the piece and the solidification of the paint, which is then polymerized in the oven.The advantages of the electrodeposition process are:it is easily automatablethe film has excellent adhesion and resistance to corrosionthe thickness is not very variable, even in the hidden areas that cannot be sprayedthere are no leaksthe yield of the products is very high being the loss <10%atmospheric emissions of VOCs (volatile organic solvents) and particulate matter are very limited