Features
AL200 is suitable for passivation treatment of aluminum, which can form a titanium-zirconium composite conversion film on aluminum substrate and has good corrosion resistance.
- Nickel-free and chromium-free process;
- It can be used for pretreatment of liquid coating, powder coating, sizing, etc., and can replace trivalent chromium or hexavalent chromium processes;
- Passivation speed is fast, and it is not easy discoloring;
- Used for pretreatment of painting: greatly improve the binding force of printing or painting.
The film layer is colorless and transparent, which does not affect the appearance of the workpiece.
Working conditions
| Item | Standard | Optimal |
| AL-200 | 10~25g/L | 15g/L |
| Temperature | 20~35℃ | 25~30℃ |
| Pure water conductance | ≤30μs/cm | ≤15μs/cm |
| Processing time | 1~5min | 3min |
| pH | 4.0 ~ 5.0 | 4.0 ~ 5.0 |
| Air stirring | Not recommended | Not recommended |
| Circulating filtration | Recommended use | Recommended use |
