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-----Proper Spelling of Iridite / Iridite
2005
I am a Drawing Checker for the Dept. of Defense and there has been some controversy in reference to the proper spelling of "Iridite" finishes. (MIL-C-5541)
It is currently under scrutiny as either being spelled "Iridite" or "Irridite".
Thanks so much
Joseph R MatthewsDept of Defense - Maryland
It's a trade name, so the trade name owner gets to dictate the spelling :-)
And Macdermid says it's 'Iridite'.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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2005
MIL-C-5541, possibly a revision F that calls out a no Hex chrome. These standard products do not comply with this stipulation. There is a hex free chrome that meets this specification. I suggest before you put anything on the drawing you check to see as to what actually is the newest requirement of this specification. Again I am only going on what I have heard about the newest requirements ( Euro Union) so if I am wrong I'm sorry. If you want info on the hex free Iridite replacement visit my web site.
Drew Nosti, CEF
Anodize USA - Ladson, South Carolina
2005
As I understand it there have been changes to
2005
"Iridite" (one 'r') is a WHOLE FAMILY of hexavalent chromium chemicals for converting a host of materials, NOT LIMITED TO ALUMINUM, to a chromate coating. "Iridite" is a registered trademark of MacDermid - formerly Allied Kelite prior to MacDermid purchasing AK. Iridite 14-2 is for doing basic chromate conversion coating on aluminum, but there is an Iridite for yellow chromate on silver, several for zinc, Iridite 15 for chromate on magnesium, etc. Bottom line: putting "Iridite" on a drawing doesn't make sense - it's a trade name and not even a unique process.
What's wrong with a specification such as MIL-C-5541, AMS2473 , or the appropriate ASTM spec?
Also, regarding Mr. Nosti's response, the only spec that's been revised [yet, as of 2005] to include a non-hexavalent chromate for aluminum is MIL-DTL-81706 [⇦ this spec on DLA] which includes a provision for BOTH the conventional hex chrome bearing as well as another for non-hex. The associated QPL-81706 [⇦ this spec on DLA] which will list qualified products for both hex and hex-free hasn't been released ( NOR HAS MIL-C-5541 ).
Milt Stevenson, Jr.
Plating shop technical manager - Syracuse, New York
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