Dear Sir: The copper alloys are not particularly resistant to oxidizing environments, including nitric acid. However, if the passivating time period is short, and the nitric acid is neutralized following the passivating treatment, the overall metal loss from corrosion should be low. This response does not address other unintended effects such as the discoloring of the bronze component, critical tolerances, etc. An other option would be to selectively hand passivate the SS components, if practical. Hope this helps! David Hendrix The Hendrix Group Inc.