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Yellow Iridite for aluminum parts to be painted





October 21, 2008

Need info for pre paint aluminum parts like yellow Iridite (chrome) process.

Jorge Alvarez
Instructor - Miami, Florida



October 2008

Hi, Jorge. Iridite is a trademark of Macdermid and they will advise you of the treatment parameters for their product. But, in brief, it involves alkaline cleaning of the aluminum, followed by etching, followed by de-smutting, followed by the Iridite treatment. This is a chromate conversion coating which prepares aluminum for painting. Please note that there is worldwide pressure to eliminate the use of hexavalent chromium as a pre-paint treatment, so you may want to use a RoHS-compliant trivalent Iridite process. Good luck.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


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