Natural stainless
The treatment generally retains the base metal's machined, brushed, or polished appearance.
Oxidation
Passivation for Custom Manufactured Parts
A chemical treatment used to support the corrosion-resistant surface condition of stainless steel parts.
- Corrosion resistance support
- Natural metal appearance
- No decorative color layer
Finish overview
Stainless surface conditioning after machining, forming, and handling.
Passivation is a chemical treatment used after suitable cleaning to support the natural corrosion-resistant surface condition of stainless steel. It is applied to shafts, valve bodies, fittings, manifolds, brackets, and other stainless parts without adding a decorative color coating.
The process does not remove major heat tint, weld scale, deep contamination, or scratches. Fabrication cleanup, alloy compatibility, cleanliness, and the required standard should be reviewed before treatment.
Appearance
What the finished surface can look and feel like.
No opaque film
It does not cover tool marks or create a paint-like visual layer.
Preparation-dependent
Heat tint, embedded iron, oil, and fabrication residue need appropriate cleaning before treatment.
Suitable processes
Manufacturing routes commonly paired with this finish.
Suitable materials
Base materials that require process-specific review.
Typical applications
Part families commonly reviewed for passivation.
Precision shafts
Valve bodies
Fluid manifolds
Threaded connectors
Pump components
Stainless equipment brackets
Benefits
Where this option can add value.
- Supports the stainless corrosion-resistant surface condition
- Maintains the natural metal appearance
- Adds no meaningful decorative coating buildup
- Can be paired with machined, brushed, or polished surfaces
Limitations
Requirements that need engineering review.
- It does not hide scratches, weld scale, or tool marks.
- It cannot compensate for the wrong stainless grade.
- Cleaning and prior fabrication condition affect the outcome.
- The process should follow an identified standard when documentation matters.
RFQ checklist
Finish details to include in the quotation package.
Clear requirements help engineering, finishing, inspection, and purchasing review the same target.
- 01Stainless grade
- 02Passivation standard or customer requirement
- 03Cleaning and weld-scale condition
- 04Tests or documentation required
- 05Areas requiring special protection
- 06Final cleanliness and packaging
Related parts
Representative geometry from the parts gallery.
The current gallery labels these stainless parts as passivated. Grade and treatment records still need to be verified for each production project.
Precision Turned Shafts
CNC Turning · Stainless Steel · Passivation
View part
Stainless Valve Body
CNC Machining · Stainless Steel · Passivation
View part
Stainless Manifold
CNC Machining · Stainless Steel · Passivation
View part
Stainless Fluid Connector
CNC Turning · Stainless Steel · Passivation
View partRelated finishes
Compare appearance, material compatibility, and functional intent.
FAQ
Passivation questions from engineering and sourcing teams.
Does passivation change the color of stainless steel?
It generally retains the natural stainless appearance. It is not intended to create a decorative color or cover surface defects.
Is passivation the same as electropolishing?
No. Passivation is a chemical surface treatment after cleaning, while electropolishing removes material electrochemically and changes smoothness and appearance.
Do welded stainless parts need preparation before passivation?
Yes. Heat tint, scale, contamination, and weld residue may require suitable removal and cleaning before the passivation treatment can be effective.
Start your RFQ
Upload your drawings and receive an engineer-reviewed quotation.
Share the material, process, quantity, finish, critical requirements, and delivery needs. contact@kewei-kw.com / +86-13929495765