Example of Passivated Stainless Steel Parts

Stainless Steel Passivation (Nadcap Accredited)

Passivation is a chemical process whereby soils and trace metallic elements from the machining process are removed from the surface of stainless steel, improving the inherent corrosion resistance of the material. The passivation process insures that the naturally occurring, protective oxide film is continuous on the stainless surface. Differing mineral acid concentrations and temperatures are used to match the process to the alloy of stainless steel. Nothing is deposited on the surface during the process. Chem Processing, Inc. offers nitric acid based passivating, as called out in most industry specifications.


Chem Processing Inc. Stainless Steel Passivation Capabilities:

  • Precision masking for selective surface passivation
  • Humidity, copper sulfate and cyclic immersion testing available
  • All AMS 2700 Types available
  • Critical handling (superfinished surfaces)
  • Abrasive blasting for scale removal

Applicable Specifications:

  • ASTM A380
  • SAE AMS 2700
  • ASTM A-967
  • AMS QQ-P-35
  • MIL-S-5002
  • PN 14.10 (UTC Aerospace Systems/Hamilton Sundstrand) 
  • PS 108 (UTC Aerospace Systems/Hamilton Sundstrand)
  • PS 124 (UTC Aerospace Systems/Hamilton Sundstrand)
  • WS 6811 (UTC Aerospace Systems/Hamilton Sundstrand)
  • SP-151 (Woodward)
  • 580-0025 (Rockwell Collins)
  • M-105-P (Mercury Marine)

Chem Processing Inc. offers stainless steel passivation services to Illinois, Wisconsin, Iowa, the Midwest North and South Carolina, and beyond. CPI is strategically located by highway routes to Chicago, Milwaukee, Madison, St. Louis, and Minneapolis. The CPI facility is minutes from Rockford Chicago International Airport, a major Midwestern air freight hub, enabling efficient door-to-door delivery across the United States or across the globe.