Stainless Steel 304
Common material for this finish.
View materialSurface Finishing
Passivation for Stainless Steel
Passivation is a chemical treatment, usually nitric or citric acid, that removes free iron and contaminants from stainless steel surfaces so the chromium-rich passive layer can form uniformly. It does not change the appearance noticeably.
Specification
Typical options
| Attribute | Typical behavior | Notes |
|---|---|---|
| Dimensional effect | Negligible | No masking normally required |
| Appearance | Unchanged | Not a cosmetic finish |
| Chemistry | Nitric or citric acid | Specify if one is required |
| Common specs | ASTM A967, AMS 2700 | Testing methods can be called out |
Typical industry ranges for reference. Final thickness, color, and specification are confirmed on your quote and drawing.
Design Tips
What to specify on your drawing
When to use
After machining or fabrication of stainless parts, especially for corrosive, medical-adjacent, or food environments.
Not a coating
It enhances the alloy’s own corrosion resistance; it does not add a layer.
Verification
Specify any required tests (e.g. humidity or water immersion) in the RFQ.
Free-machining grades
303 and similar grades need care; note the grade.
Compatible Materials
Materials often paired with this finish
Stainless Steel 316
Common material for this finish.
View materialStainless Steel 17-4 PH
Common material for this finish.
View materialSurface Finishing Service
See all finishing and post-processing options.
View serviceAdd a Finish
Include finish requirements with your RFQ.
Note the finish, specification, color, thickness, and masked areas on your drawing so the quote reflects them.