Our Services - Finishes Detail

Chromate Conversion Coatings

Chromate conversion coatings, sometimes referred to as chemical conversion, chem film, IriditeĀ® or AlodineĀ®, refers to the process of applying a thin barrier coating to passivate aluminum substrates. The chromate conversion coating is a thin inert layer with self-healing properties that protect the substrate, boosting corrosion protection, improving electrical conductivity, and providing excellent paint adhesion.

Eco Finishing offers a selection of different chromates conversion coatings. We can help you determine the best chromate option for your needs based on the final use of the parts. Hexavalent chromates offer a superior level of corrosion protection; however, usage of hexavalent chromium present in these products has been reduced due to regulations such as RoHS. Trivalent conversion coatings are RoHS compliant as they do not contain hexavalent chromium. Chromate conversion coatings also provide brighter and more uniform appearance or color to the parts.

Chromate conversions available on aluminum
HexavalentTrivalent (RoHS Compliant)
ClearX X


  • ASTM A380
  • ASTM A967
  • AMS-QQ-P-35
  • AMS 2700

Typical Industries and Applications:

  • Aerospace industry
  • Electronic cabinets
  • Aluminum stampings
  • Electronic components
  • Zinc die castings
  • Aluminum die castings

Capabilities and Related Services:

  • Salt spray testing
  • Stripping
  • Tumbling
  • Blasting
  • Packaging
  • Masking