What is E-coating?

E-coating is an electrically-applied paint coating.   It is an electro-deposition coating or electro-coating.   E-coating was developed originally for the automotive industry because it is economical and provides superior coverage, adhesion and corrosion resistance. It coats aluminum, zinc, brass, and steel - any material that conducts electricity.   Some applications for E-coating include:

  • Automotive parts
  • Metal stampings
  • Marine hardware
  • Patio furniture
  • Castings
  • Electrical fixtures


How E-coating Works

The parts to be coated are attached to metal racks and immersed in the E-coat paint bath.   An electrical charge is applied to the racks and therefore to the parts attached to them.   The metal parts attract the opposite charged paint particles.   As the paint is deposited it begins to act as an insulator and deposition slows, stopping at a thickness that is determined by the amount of voltage applied.   Even though deposition may have been slowed or be complete at one area on the surface of the part, deposition will continue at any uncoated or incompletely coated areas of the parts until complete coverage is achieved.   As you can see, the very nature the E-coating process tends to produce a complete and uniform coat on even the most complex shaped parts!


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