Stainless Steel Passivation
Stainless Steel Passivation Services
Restore the Corrosion Resistance Your Parts Were Designed For
Stainless steel may be tough—but fabrication, welding, and exposure to chemicals can damage its protective oxide layer, making it vulnerable to corrosion. That’s where passivation comes in.
At Fiesco, we provide industrial passivation services that restore stainless steel to its optimal corrosion-resistant state. Whether you’re in medical, food processing, aerospace, or precision manufacturing, passivation is the key to durability, hygiene, and compliance.
What Is Passivation?
Passivation is a chemical treatment process that removes free iron and contaminants from the surface of stainless steel after machining or fabrication. It enhances the formation of a chromium-rich oxide layer, which serves as a natural barrier against rust, oxidation, and staining.
Fiesco uses industry-standard nitric and citric acid formulas, following ASTM A967 and A380 protocols, to ensure surgical-grade results.
Why Choose Passivation?
After machining, welding, grinding, or cutting stainless steel, invisible surface impurities and iron particles may remain. These particles initiate corrosion, especially in high-moisture or cleanroom environments.
Passivation helps by:
✅ Restoring full corrosion resistance
✅ Extending product lifespan
✅ Improving cleanliness and appearance
✅ Meeting FDA, ISO, and ASTM standards
✅ Reducing warranty claims and product failures
Ideal Applications
Our passivation services are trusted by companies in:
- Medical Devices – Instruments, implants, surgical trays
- Food & Beverage – Tanks, conveyors, piping systems
- Pharmaceutical – Cleanroom equipment, mixers
- Aerospace & Defense – Brackets, fasteners, enclosures
- Semiconductors – Cabinets, housings, process tools
- Precision CNC Components – Custom stainless steel parts
If your product needs to stay clean, corrosion-free, and compliant, passivation is essential.
Get a Quote today
Get a fast, accurate quote tailored to your project needs.
The Fiesco Passivation Process
Our quality-controlled passivation workflow includes:
- Surface Cleaning
Removal of oils, grease, and debris via ultrasonic or chemical cleaning. - Acid Treatment
Parts are submerged in nitric or citric acid solutions to dissolve free iron. - Neutralization & Rinse
Neutralizing agents and deionized water ensure no residual chemicals remain. - Drying & Inspection
Final checks include surface cleanliness, color uniformity, and spot tests for corrosion resistance.
We work with both large production batches and individual precision components, offering flexibility and consistency for manufacturers across Mexico.
Why Fiesco?
Here’s what makes us a top choice for stainless steel passivation:
- Local service with fast turnaround in Baja California, Monterrey, Querétaro & Guadalajara
- Full integration with laser cutting, CNC machining, and powder coating
- Cleanroom-ready protocols and certifications available
- Support for high-volume OEM production and custom part runs
- ISO-aligned documentation and traceability upon request
Protect Your Investment—Down to the Molecular Level
If you’re not passivating your stainless steel after fabrication, you’re leaving performance—and profit—on the table. Fiesco helps ensure your components don’t just look stainless, but act stainless.
Request a quote today
And discover how passivation can reduce failures and increase trust in your product.