Stainless Steel Passivation

Passivation is a process performed to make a surface passive,  a surface film is created that causes the surface to lose its chemical reactivity. Passivation unipotentializes the stainless steel with the oxygen absorbed by the metal surface, creating a monomolecular oxide film. Passivation can result in the very much-desired low corrosion rate of the metal.
It is accepted as a very important protection process for parts used at defense industry