Alodine

Alodine, also referred to as Chemical Film or iridite, is a chromate conversion coating that is applied only to the surface of aluminum. It gives good corrosion protection as well as providing a excellent base for painting. The color can vary from colorless (when specified) to golden - iridescent - brown.   Our materials conform to MIL-C-81706.  The coating should be continuous, free from powdery areas, breaks, scratches, etc. Specifications Comments MIL-C-5541 No dimensional  change Class 1A Class 1A is used as a corrosion preventative film (unpainted) or to improve adhesion of paint finish systems Class 3 Class 3 is used as a corrosion preventative film for electric and electronic applications, where low resistance contacts are required.