Passivation Treatment
General Details and Specification of Passivation Treatment
A process designed to remove foreign metals from the surface of stainless and corrosion resistant steels and help to promote natural tendency of surface to oxidize. Does not change the appearance of the base metal. Process purifies surface and therefore improves corrosion resistance.
Benefits of passivation
- Surface Rust Removal
- Removal of Surface Iron From Machining Process
- Enhances Protective Passive Film
- Good diffusion barrier
- Suitable for either Rack or Barrel plating
Specifications
| Specs | Thickness | Comments |
|---|---|---|
| QQ-P-35C | No dimensional change | |
| Type II | No dimensional change | Medium temperature nitric acid solution with sodium dichromate. |
| Type VI | No dimensional change | Low temperature nitric acid solution. |
| Type VII | No dimensional change | Medium temperature nitric acid solution |
| Type VIII | No dimensional change | Medium temperature with high concentration of nitric acid. |