Chemfilm is a chemical conversion coating that is used to passivate aluminum. It protects aluminum substrates from corrosion and serves as a base for organic coatings while leaving dimensions unchanged.

Also called: Chromate, Conversion Coating, Chromate Conversion, Iridite (MacDermid), Alodine (Henkel)

Type I – Compositions containing hexavalent chromium.
Type II – Compositions containing no hexavalent chromium.

Class 1A – For maximum protection against corrosion, painted or unpainted.
Class 3 – For protection against corrosion where low electrical resistance is required.

Method A – Spray
Method B – Brush-on or wipe-on
Method C – Immersion
Method D – Applicator pen or presaturated applicator device