Passivation of stainless steel components that have been brazed with a copper-based or silver-based brazing filler metal (BFM) should never be done after brazing has occurred. The nitric acid in the passivation-solution will rapidly (and completely) dissolve away all the copper and silver in the BFMs and, thus, will completely destroy the integrity of any such brazed joint.

Passivation of stainless steel components should only be done when the stainless is brazed using nickel-based BFMs, since nickel-based BFMs will not be hurt by such a process. Again, passivation should never be used on anything brazed using copper- or silver-based BFMs.