On-Site Passivation Services

Astro Pak has over six decades of experience perfecting passivation chemistries and processes. The company brings that expertise, with the advanced equipment and highly trained personnel, on-site to the user’s facility to execute pre-operational or maintenance cleaning and passivation on users’ systems and equipment.

For components, parts, and sub-systems that could be serviced out-of-place, Astro Pak’s countrywide shop facilities are ideally suited to inexpensively meet users’ cleaning needs.

The company has advanced facilities that have the potential to house parts of all sizes and volumes, such as dip tanks up to 40 ft and overhead bridge cranes consisting of a 10-ton lifting capacity for oversized parts.

The company provides pick-up and delivery services and cGMP-compliant documentation packages at the end of each job. The highly skilled technicians and controlled environments guarantee consistent quality and conformity to industry and customer-specific standards.

During an audit tour from a regulatory agency, the lead Astro Pak technician had answers for things that I did not even know that I had to worry about.

-Senior Utilities Engineer, Boehringer-Ingelheim

Passivation Standards

Astro Pak takes pride in a long legacy of meeting and surpassing the standards set out by a range of organizations in several industries, such as ASTM, ASME, SAE, SEMI, and FDA, to name a few.

Trust the Experts in Passivation

The proprietary Ultra Pass® passivation process has been renowned for its eco-friendly blend of high-purity ingredients, such as chelants that bind with metal ions by making them incapable of redepositing on surfaces. Consequently, the material handling needs and other impacts on-site are significantly decreased.

The Ultra Pass® passivation process offers excellent outcomes, producing an improved passive layer on the surface of stainless steel and yielding matchless corrosion resistance.

Studies have shown that the chrome-to-iron ratios obtained by Ultra Pass® passivation far exceed ASME BPE suggested minimums and fulfill or exceed the needs of several industries, such as aerospace, pharmaceutical, semiconductor, and biotechnology.

Systems and Equipment Experience

  • Process and Storage Vessels and Tanks
  • Product and Distribution Piping available
  • Water for Injection (WFI) Tanks and Stills
  • Sterilizers and Autoclaves
  • Clean in Place (CIP)
  • Spools, Gaskets, Flanges
  • Tubing and Hoses
  • Boilers
  • Bioreactors, Fermentors, and Lyophilizers
  • Clean Steam Generators and Clean Steam Systems
  • Valves (Relief, Ball, Butterfly, Needle, Gate)
  • Gauges (Pressure, Flow meter, Hydraulic, Cryogenic)
  • Reverse Osmosis, DI, Pure Water
  • Heat Exchangers
  • Fittings, Fasteners available
  • Transducers and Sensors
  • Components and Hardware
  • Any stainless-steel parts, equipment, or systems


  • ASTM A380
  • ASTM F86
  • AMS 2700
  • ASTM A967

Markets Served

  • Aerospace, Military, and Defense
  • BioPharmaceutical
  • Household and Personal Care
  • Water and Wastewater
  • Power Generation
  • Food and Beverage
  • Laser
  • Semiconductor
  • Medical Device
  • Heath Care
  • Chemical Manufacturing and Distribution

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