Pickling & Passivation

Astro Pak has been performing Pickling & Passivation for nearly 60 years. We perform pickling of metallic surfaces to remove corrosion and weld damage from steam, heat and other corrosive environments. The pickling process prepares damaged stainless steel surfaces for proper passivation resulting in improved corrosion resistance. Our pickling process is a non-selective surface treatment that removes oxidation from stainless steel on heavily corroded surfaces. It is also used for nickel alloy or super-austenitic post weld preparation and embedded iron contamination.

In addition to Pickling & Passivation, Astro Pak offers a range of Surface Treatment including Electropolishing. We also offer Media Blasting services, including Dry Ice and Bead Blasting.

Trust the Experts in Pickling & Passivation

For over 50 years, Astro Pak has been perfecting the chemistry and cleaning process of Passivation. Our proprietary chemistry, UltraPass® is a chemical treatment for stainless steel and other metals that enhances the ability of the treated surfaces to resist corrosion. We also Electropolishing and Mechanical Polishing services.

Astro Pak delivers chemical cleaning & passivation services to installed systems: pre-operational, pre-commissioning of new construction, post modification, or for maintenance during shut-downs. Whether it is UltraPass®, nitric acid, or other chemistries, we can process piping, fittings, vessels or other types of equipment. In addition to our expertise in circulating chemistry through facility equipment, tanks, and distribution systems, we also have a Gel Passivation process to address surface discoloration, spot rouge, HAZ of welds, or corrosion on most exterior surfaces. We can perform our work at customer facilities or in one of our nationwide locations.

Astro Pak’s fleet of vehicles, mobile skids, equipment and chemicals allow us come onsite to respond to emergency situations for critical utilities, systems and equipment. We also can process tubing, fittings, and other components in our shops located nationwide. Immediate response for emergency outages and critical utilities are routinely provided. When our job is complete, you will receive cGMP compliant documentation packages for your systems and equipment maintenance records.

Astro Pak commits to providing customers with the level of excellence they expect and deserve by:

  • Rapid Response
  • Highly Trained Personnel delivering superior consulting services
  • State of the Art Equipment Nationwide
  • Advanced Chemistry & Process Technology
  • Superior Documentation (Meeting cGMP Requirements)

Interested in Informal Consulting? 

Astro Pak provides onsite training and education through our Lunch & Learn programs. We present the latest research on Passivation and Derouging technology, stainless steel surface chemistry, Precision Cleaning, Electropolishing & Mechanical Polishing, and sterilization services. We also provide lunch for your facility! To learn about our Lunch & Learn program please contact us!

Systems & Equipment Experience

  • Process or Storage Vessels and Tanks
  • Product and Distribution Piping
  • Pipe Spools
  • Manifolds
  • Heat Exchangers
  • Fittings, Fasteners, Flanges
  • Components and Hardware
  • Specialty Customer Parts and Systems


  • ASTM A380
  • ASTM A967
  • ASME BPE 2012
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