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Ted Mooney, P.E. RET
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Difference between gold Alodine and gold chem-film?
We are a machine shop. One of my customers is requesting Gold Alodine. My local platers does Gold Chem Film. Are Gold Alodine and Gold Chem Film the same?
Jeff Carley- Valencia, California, USA
2003
Chem Film is the current name for a chromate conversion coating on aluminum. There are shades from clear to light tan to yellow to gold to a burnt orange. Alodine is the specific name for one of the two best known products. Iridite is another. (there are literally dozens not counting home brews)
James Watts- Navarre, Florida
2003
Alodine = Iridite = Chem Film = Chromate on aluminum = MIL-C-5541. They're all the same. Alodine is Henkel's brand name for a variety of chromate products, primarily for aluminum. The military spec for these products refers to the coating as chemical film.
Milt Stevenson, Jr.
Syracuse, New York
2003
Yes, But, Milt. Jeff and some other readers may not realize what you know, that for a chem film = chromate on aluminum to comply with Mil-C-5541 the particular chemical mixture must be on the QPL-81706 [on DLA] list.. Alodine and Iridite are on the list, as are a lot of others; but some small vendors' products and all home brews fail to be on that list and therefore cannot be used for Mil-C-5541
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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