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How do you get color with anodize and Alodine?

How do you get the color when a piece is anodized? Can you get color with Alodine? Seems I saw somewhere that one of these processes uses Rit Dye [affil link]. Is that true? Thanks.

Chris Vuxton
Aircraft Hobbyist - Warrenton, Virginia
2003

2003

Alodine is a Henkel trade name for MIL-C-5541 chromate conversion coating, which can be clear or gold-ish. Anodized parts can be dyed nearly any color and the dyes and the dyeing process can be a bit complex, but yes, a hobbyist can play with Rit dyes instead. However, the conventional sulfuric acid anodizing process does not find much application in aircraft for a number of reasons including loss of fatigue strength. It would be best to put your questions clearly in context.

Ted Mooney, P.E.
Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey

I am using Alodine 1500 on my products with clear finish. Is there a way to get gold color/finish with Chrome III coatings? Please provide details on any dyes or materials available.

Thanks,

Sarah Crawford
Power electronics - US
2004

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