Passivating is the chemical treatment of a stainless steel surface with a mild oxidant such as a citric acid and nitric acid base solution, this is typically done to remove any free iron from the surface of the metal, which enhances the corrosion resistance of the stainless steel surface and accelerates the re-formation of the passive layer
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Passivation : What is Passivation?
Passivation is a chemical cleaning process that is designed to remove free iron and other ferrous contaminants
from the surface of stainless steel parts. By removing the contamination from machining, stamping, etc., you are
helping restore the material to the original mill condition and corrosion specifications.
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