ALUMINUM
Chromate conversion coatings on an aluminum substrate are known by the following terms: chemical film, yellow iridite, and the brand names Iridite and Alodine. It is also commonly used on aluminum alloy parts in the aircraft industry.
Iridite NCP is a non-chromium type of conversion coating for aluminum substrates.
The most commonly referenced standard for chromate conversion coating aluminum is MIL-DTL-5541
