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Chemical passivation treatment in laboratory
I am a research associate and want to do chemical passivation treatment by using water based chromate coating in the laboratory. I do not know how to do it. Kindly help me by providing name and concentration of the chemicals used and also the test conditions (i.e. duration, pH, chemical additive, if any). Is corrosion inhibitor used during the chemical passivation treatment? From where can I get some details on the topic?
Thanking youYunus Jawaid
Purvaanchal University - Jaunpur, UP, India
The chromate treatment IS the corrosion inhibitor, Yunus. A starting point might be Mil-C-5541 [link is to free spec at Defense Logistics Agency, dla.mil], although nearly any metal finishing book, like those on our "must-have" booklist, will have a chapter on chromate conversion coating. Good luck with it.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey