A to Z Metal Finishing

Passivation of Stainless Steel

Passivation improves the corrosion resistance properties of components made of Precipitation, Hardened, Austenitic, Ferritic and Martensitic steels.  Passivation treatment improves the surface condition of stainless steel by dissolving iron that has been imbedded in the surface during forming or machining.  If allowed to remain, the iron can corrode and give the appearance of rust spots on the stainless steel.
Passivation consists of immersing stainless steel parts in a solution of nitric or citric acid, which will dissolve the imbedded iron and restore, a corrosion resistant surface by forming, a thin transparent oxide film.

  • ASTM-A-967
  • AMS-QQ-P-35
  • AMS-2700
  • ASTM-380
  • MIL-S-5002

Tank Sizes:

    • Nitric Acid: 24” x 36” x 36” deep
    • Citric Acid: 30” x 24” x 36” deep