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Trivalent Black Chromium Plating Additive
Black Trivalent Chrome
1. Feature:
1. It is a green environamental product, not contain hexavalent chrome, and its wasted drain can be treated easily.
2. Black color as carbon, with good covering and even plating capability.
3. The bath not contain organic solvent, good bearing to sulfate ion and chloridion.
4. Good performance even power supply cut suddenly; faster speed of precipitation than hexavalent chrome plating.
2. Composition and Condition:
| Composition | Range | Unit |
| TVCB Make-up Salt | 275-325 | g/L |
| TVCB Chrome Salt | 100-150 | g/L |
| TVCB Stabilizer | 55-75 | ml/L |
| TVCB Wetting Agent | 2-4 | ml/L |
| TVCB Blackening Agent | 10-50 | ml/L |
| TVCB Covering Agent |
10-20 |
ml/L |
| pH Value | 2.5-2.8 | |
| Temperature | 28-40 | °C |
| Bath Baume | 25-28 | Be |
| Cathode Current Density | 10-30 | A/dm2 |
| Anode Current Density | 3.5-5 | A/dm2 |
3. Equipment Requirement:
Materials: Tank with PVC/PP/ABS/PE Liner is allowed.
Anode: exclusive anode with titanium hook for Trivalent chromium plating
Tmperature Control: adopts titanium heater and cooling devices.
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Rectifier with Ampere Hour accumulator.
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