JW-816 High-Corrosion-Resistant Trivalent Chromium Color Passivation Agent
Category:
Detailed description:
01
JW-816 high-corrosion-resistant trivalent chromium color‑passivating agent is an environmentally friendly passivation product; the passivation solution contains no hexavalent chromium.
02
Easy to operate, with colors customizable to suit your needs.
03
Excellent corrosion resistance; the zinc coating exhibits a neutral salt spray test duration of over 96 hours at a thickness of 8 μm.
04
Can be used for all post‑galvanizing treatments.
Process and Operating Conditions
Galvanizing → Three-stage water rinsing → Activation → Water rinsing → Trivalent color passivation → Water rinsing → Cold-air drying → Hot-air drying (60–80°C)
Activation
| 67.5% nitric acid | 2–10 mL/L | ||||
| Temperature | Room temperature | ||||
| Time | 5–20 seconds |
Trivalent blue passivation
| Project | Scope | Optimal value | |||||
| Build a bathhouse | JW-816: 80–120 ml/L | 100ml/L | |||||
| pH value | 1.8-2.8 | 2.3 | |||||
| Temperature | 18-35℃ | 25℃ | |||||
| Passivation time | 20-40s | 25s | |||||
| Stirring method | Air stirring | Air stirring | |||||
Keywords:
JW-816 High-Corrosion-Resistant Trivalent Chromium Color Passivation Agent
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