Passivation removes embedded contaminants—such as free iron, weld oxides, and surface particulates—that arise during fabrication, machining, and handling. Through chemical treatment, we restore stainless steel to its original corrosion-resistant state, improving both durability and sanitary performance.

Our Cleaning & Passivation Process

• Pre-Cleaning: Degreasing and cleaning to remove organic residues and debris.
• Chemical Passivation:
  • Nitric Acid: Ideal for high-chromium stainless steels (304/316/316L).
  • Citric Acid: Eco-friendly option, enhanced with chelating agents for product purity.
  • Phosphoric Acid: Used selectively for special environments.
• Pickling (Optional): Restores surface finish after welds and oxidation using blended acids.

Testing & Documentation

• Copper sulfate test (ASTM A967)
• Water immersion and rinse evaluations
• Visual inspections for etching and discoloration
• Certificate of Compliance with ASTM A380 and A967

On-Site & In-House Service

We offer flexible service delivery either at your facility or at our dedicated processing shop, handling fittings, tanks, skids, and complete assemblies.