The Chromium Free Passivator for Casting  Aluminumis specially developed for die - cast aluminum materials. It is green and environmentally friendly, and has excellent passivation effects. It can significantly enhance the bonding force between the substrate and the coating, while also improving the oxidation resistance of the substrate.

1. It can significantly increase the salt spray resistance time of the substrate, and has stronger oxidation resistance. 

2. It is green and environmentally friendly, and does not contain heavy metals such as P and Cr⁶⁺. 

3. The agent has strong stability, and is easy to operate and manage. 

4. The agent has a high concentration, requires a low ratio when preparing the tank solution, has a small addition amount, and thus has a low usage cost. 

5. It can greatly enhance the bonding force between the substrate and the coating. 

6. It is compatible with most existing equipment, reducing the investment in equipment transformation.