Passivation is a chemical treatment process that removes free iron and surface contaminants from stainless steel equipment and pipelines. It restores the material’s natural corrosion-resistant layer — critical in pharmaceutical and cleanroom environments where system hygiene and durability are non-negotiable.
PROCESS
How the Process Works
1
Cleaning and degreasing of internal surfaces
2
Circulation or immersion in passivating agent (usually nitric or citric acid)
3
Rinse cycles with purified water
4
Surface testing for iron removal and oxide layer restoration
5
Final QA check and documentation
Passivation
Key Features & Benefits
Removes iron and weld-related contaminants
Restores protective oxide layer on stainless steel
Enhances corrosion resistance and system longevity
Complies with ASTM A967 and industry standards
Suitable for both new and refurbished systems
Delivered with iron level reports and QA certification
