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Chemical Conversion Coating (Chem Film)

Chem Film, commonly known by their brand names: Alodine and Iridite, is a chemical conversion coating process that is used to passivate aluminum.  Chem Film protects aluminum substrates from corrosion and serves as a base for organic coatings while leaving dimensions unchanged.

Chem Film per MIL-DTL-5541 Class 3 is electrically conductive. The best corrosion protection is provided by Chem Film perMIL-DTL-5541 Class 1A.

Mspecs offers both trivalent (RoHS compliant) and hexavalent chromium based Chem Film.


Capabilities:
  • Available masking for selective surface coating
  • Salt Spray Corrosion Test per ASTM B117( 168 hours)
  • RoHS compliant Chem Film (MIL-DTL-5541 Type 2)
  • Chem Film is approved for prep and base treatment of Military CARC primer and paint

Specifications:
  • MIL-DTL-5541
  • AMS-2473 & 2474
  • MIL-DTL-81706
  • AMS-2473
  • PPS 6.2.1
  • ASTM B449
  • AMS 2477

Typical Industry Applications:

  • Aerospace/Aviation: Chem Film is used for general corrosion protection and can be brushed on for aerospace repairs
  • Defense/Military: Chem Film is used as a base coat for CARC paint on ordnance, vehicles and tactical equipment
  • Telecommunications: Chem Film is used by means of conductivity and resistance through the coating