1. TR-668 Properties
1. Environmental trivalent chromium passivation solution, in line with RHOS directive, clean production processes.
2. The zinc plating workpiece layer appears translucent after white-blue passivation.
3. Economy passivation solution, impurities high tolerance, long life cycle and low cost.
2. TR-668 Technological process
Zinc plating → Washing with water → Brighten with dilute nitric acid → Washing with water → TR-668 → Washing with cool water → Washing with hot deionized water → drying
3. TR-668 Operating Condition
| Operating condition | Operating range |
| TR-668 | 40-70 ml/L(depends on passivation time) |
| Immerse time | 10-40s (The higher the content, The less the passivation time) |
| Temp. | 20-30℃ |
| pH | 1.8-2.5 |
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