* It is Trivalent chromium passivation for blue process, free of hexavalent chromium, environmentally friendly, has passed SGS international certification.
* It is with particularly excellent anti-corrosion properties.
* Long service life. After passivation process, there will be some TR-290LC draged out by the parts when washed, it means there will be some TR-290LC in washing tank. This washing solution can be reused.
* Stable passivation solution. It is suitable for automatic production line and manual production line, and also suitable for acidic zinc plating and alkaline zinc plating.
* This product has excellent anti-white rust ability. It can be used with sealer to improve the salt spray test.
1. Process Flow
Process:
Zinc plating → Washing with water → Brighten with dilute nitric acid(0.5%) → Washing →Immerse in TR-290LC→Washing with cool water→ Washing with hot deionized water → drying
2. Operation and Application Indication
| Operating condition | Best | Range |
| TR-290LC | 40ml/L | 30-60ml/L |
| Immersion time | 35s | 25-45s |
| Temp. | Room Temperature | 25 ℃ |
| PH | 2.5 | 2.0-3.0 |
Our products are sold all over the world, you can rest assured.
