Nitric and citric acids are the most commonly used chemicals for passivating stainless steel.
The move from engraving to passivating is done in the process recipe and the parts do not need to leave the laser engraver.
The chloride ions reaching the steel participate in electrochemical reactions that break down the passivating
layer on the steel surface.
Morris Cohen's views about passivating
films have stood the test of time, and his contribution by the mid-sixties to the understanding of passivity established him as a leader of international stature in this field.
The objective of the proposed study is to evaluate the suitability of the environmental friendly citric acid process for replacing the health hazardous nitric acid in passivating
stainless steels used for manufacturing spacecraft and ground support structures on applications requiring corrosion resistance.
ii It should be Alkaline Nature and also contains passivating
Now, Columbia Chemical s exclusive black all trivalent passivating
conversion coating for electroplated zinc nickel alloy is part of GM s limited record of approved finishers for zinc nickel.