Passivation of Stainless Steels

Process Specifications

  • AMS 2700
  • AMS-QQ-P-35
  • QQ-P-35
  • ASTM A967/967M-17
  • ASTM A380/A380M-17
  • GPS3000-1

Aerospace Quality Systems
Chemical Processing

About Passivation of Stainless Steels

Passivation is a commonly used process typically performed on stainless steel alloys that removes free iron from the surface of the material and creates a very thin protective layer of chromium oxide making the surface of the stainless steel unreactive. During manufacturing processes such as turning, drilling, milling, cutting and grinding small iron particles can get imbedded into the surface of a stainless-steel part creating a potential corrosion site. The passivation process dissolves these iron particles or any other atmospheric corrosion that may be on the part eliminating the potential for the corrosion sites or further oxidation.

Not all stainless-steel alloys can be passivated in the same manner or with the same formulation of passivation solution.  The proper bath chemistry is determined by the alloy of the stainless steel. Contact the experts at CTL to learn which passivation process and bath will give you the best results for your parts.

  • Removes Imbedded Containments
  • Prevents rusting
  • Extends product life

Additional Services

  • Masking
  • Abrasive blasting, sand or glass
  • Pre-plate Stress Relief and Hydrogen Embrittlement Baking
  • Expediting
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