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 clear (RoHS compliant) and hexavalent yellow chromium based Chem Film.
Good corrosion protection
Excellent conductive surface
Provides good adhesion for painting
Adds no weight
Maintains pre-process dimensions
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 primer and CARC paint