The zinc plating (galvanizing) for steel brake line tubes/pipes can be finished with different corrosion protection performances, followed by chromium passivation (chromate treatment), with no hexavalent chromium used.
The following table shows the data of the performances of the zinc plated (galvanized) steel brake line tubes/pipes.
| Zinc Thickness, μm min | Passivation | NSS* Test, hr min | |
|---|---|---|---|
| White Rust | Red Rust | ||
| 8 | White/Light Blue | NA | 96 |
| 8 | Yellow/Iridescent | 72 | 168 |
| 8 | Dark/Olive Green | ||
| 13 | White/Light Blue | NA | 144 |
| 13 | Yellow/Iridescent | 72 | 216 |
| 13 | Dark/Olive Green | ||
| 25 | White/Light Blue | NA | 240 |
| 25 | Yellow/Iridescent | 72 | 312 |
| 25 | Dark/Olive Green | ||
* Neutral Salt Spray
