Avtec Finishing Systems offers Nitric Acid Passivation, Sodium Dichromate, and Citric Acid Passivation to industries throughout the United States, specializing in the Medical, Aerospace, and Defense Industries. Our Nadcap and ISO-certified facilities adhere to stringent process controls to ensure repeatability in processing the most critical components. Passivation removes free iron from the surface of stainless materials, preventing oxidation.

Our ability to Passivate all grades of stainless steel to virtually all specifications makes us the logical choice in metal finishers. At the same time, our on-site testing provides our customers with the verification they need.

Applications and Specifications of Passivate

Passivation can be performed on most grades and types of stainless steel such as: Austenitic, Duplex, Martensitic, Free Machining, Ferritic, and precipitation hardening grades. The purpose of passivation is to clean and remove free iron creating a passive layer to prevent rust.

Passivate finishing options available:

  • Nitric
  • Citric
  • Sodium Dichromate

Common Specifications:

  • AMS 2700
  • ASTM A967
  • AMS QQ-P-35
  • ASTM A380

Request a Quote

How can Lindgren Group’s Avtec Finishing Systems and Nico Products Divisions partner with your company for greater success? Between our two facilities, we offer dozens of chemical and electroplating options, Gold Plating and other precious metal plating options, mechanical finishes, and quality systems to support our efforts in providing you with the best Metal Finishing available in the market today. Complete the form below to request a quote.