Summary for yellow trivalent chem film Discussion
Mil-dtl-5541 chem film in yellow trivalent is discussed briefly in the context of finding a compliant conversion coating product. The question asks about using MIL-DTL-5541, and Isaac Lin replies that Henkel offers Alodine T 5900 and 871 products that they claim conform to DTL-5541. He notes, however, that he has no idea about the color, so the thread does not confirm whether these products are yellow trivalent or whether they meet a specific appearance requirement. The exchange is therefore limited to a possible product lead rather than a definitive recommendation. Readers looking for a yellow trivalent chem film under this spec would need to verify both compliance and color directly with the supplier.
Q. I want to use MIL-DTL-5541
[⇦ this spec on DLA] class 3, color: gold. Is it possible to get the gold color calling out type I (no hexavalent)?
Jeff Cole
– Butler, Pennsylvania
April 10, 2012
A. Hi Jeff.
To my knowledge the only Mil-DTL-5541 approved trivalent coating is the Navair-developed TCP system, which is essentially colorless and cannot be dyed, or otherwise made to look like it’s toxic hexavalent chromium. The situation may have changed, but not that I know of.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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April 10, 2012
A. Henkel has Alodine T 5900 and 871 products which they claim to conform to DTL-5541. No idea about color, though.
Isaac Lin
– El Dorado Hills, California
November 11, 2013