Chemical film coating is also referred to as Chem Film, Chromate Conversion, Iridite and Alodine. These are essentially the same process, the application of a chromate conversion coating on aluminum. Chem film coating produces a finish which:
protects from corrosion;
assures good paint adhesion; and
Clear or yellow coating on aluminum. A corrosion preventative film used where low electrical resistance is required or to improve paint adhesion.
Chem Film provides less corrosion resistance than other finishes such as anodizing, and does not resist abrasion. The United States military spec for chemical films and chemical film materials for aluminum alloys is Mil-C-5541E (this for the link)
Nor-Ell complies with many industry and military standards. Listed below are some of the more common standards in the industry. We have a comprehensive library of standards available. If you are looking for a specific standard or a specific prime contractor standard not listed, please contact us at