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ElectroFin® E-coat

Factory-Applied Corrosion-Resistant Coil Coating

  • ElectroFin® E-coat is a water-based, flexible epoxy polymer coating
  • process engineered specifically for HVAC/R heat transfer coils.
  • ElectroFin® uses a PPG POWERCRON® e-coat formulation
  • specifically designed to provide excellent edge coverage of fins with a unique polymer that controls the flow characteristics of the coating.
  • Benefits of ElectroFin’s factory-applied electrocoating process:
    • The preferred corrosion-resistant coil coating choice for every
      major HVAC/R OEM
    • The only process that can guarantee 100% coil coverage
      without bridging, including enhanced fin designs
    • Proven corrosion protection for new all-aluminum microchannel coils
    • Excellent corrosion and UV resistance make it suitable for
      coastal environments

Corrosion Resistance

In the electrocoating process, the coil acts in the same way as a magnet. The coating molecules are electrically attracted to the metallic coil surfaces, meaning the entire coil is completely and uniformly coated. The result is a finish which provides excellent resistance to coastal marine (salt-air), industrial and urban environments. When properly maintained, you can expect ElectroFin® e-coated coils to provide protection for years.

Resistance to UV Degradation

When coils are to be subjected to ultraviolet exposure, they receive a spray-applied, UV-resistant urethane mastic topcoat. As a result, UV degradation of the epoxy e-coat polymer molecules is eliminated and the film integrity is maintained.

Proven Effective

The electro-deposition process is the most automatic, controllable, and efficient method for applying a corrosion inhibiting coating to a metallic workpiece. The process dictates that all metal surfaces are coated in an even, uniform finish. All coil surfaces reach an average e-coat dry film thickness of 1 mil (0.001”).


Coil will have a flexible epoxy polymer e-coat uniformly applied to all coil surface areas with no material bridging between fins. The coating process will ensure complete coil encapsulation and a uniform dry film thickness from 0.6 – 1.2 mils on all surface areas including fin edges and meet 5B rating cross-hatch adhesion per ASTM B3359-93. Corrosion durability will be confirmed through testing to no less than 5,000 hours salt spray resistance per ASTM B117-90 using scribed aluminum test coupons. Coils subjected to ultraviolet (UV) exposure will receive a spray-applied, UV-resistant urethane mastic topcoat to prevent UV degradation of epoxy e-coat film.