Stainless Steel Passivation

Passivation restores the corrosion-resistant chromium oxide layer on stainless steel pipework, welds and vessels. Our engineers deliver citric-acid-based passivation programmes for pharmaceutical, biotech and process industries where cleanliness and traceability are non-negotiable.

What We Cover

• Citric acid passivation — safe, environmentally-friendly alternative to nitric acid passivation.
• Process & pharmaceutical pipework — cGMP-aligned services for regulated sites.
• DI water flushing — high-purity deionised water for post-passivation rinsing.
• Velocity flushing — controlled high-velocity flushes to remove particulate.
• Full documentation — test certificates, water quality reports and traceability records.

Applications

Pharmaceutical clean utilities, biotech process lines, semiconductor DI water systems, food & beverage process pipework and any high-purity stainless steel installation.

Why Citric Acid

Citric acid passivation is safer for site personnel, gentler on gaskets and seals, and better for the environment than traditional nitric-acid processes — while delivering equivalent corrosion resistance.