Brightener 96 for Cyanide Zinc plating
PROPERTIES
1. Wide bright area, bright deposit can be obtained when current density is 0.2~2A/dm2.
2. Strong throwing power, uniform bright deposit can be obtained on the complex parts, especially suitable for barrel plating.
3. Suitable for low-chrome passivating, it can lower pollution over 90% comparing with traditional Cr6+ pollution.
4. Suitable for high, medium and low cyanide plating bath.
5. It doesn’t contain aldehyde, it is stable and has low consumption in strong alkaline solution.
BATH INSTRUCTION
| Low cyanide | Medium cyanide | High cyanide | Little cyanide | |
| ZnO | 10~15g/L | 15~25g/L | 35~45g/L | 11~12g/L |
| NaCN | 15~20g/L | 25~40g/L | 70~90g/L | 6~10g/L |
| NaOH | 70~80g/L | 70~80g/L | 80~100g/L | 110~120g/L |
| Na2CO3 | 15~20g/L | 15~20g/L | 15~20g/L | |
| Na2S | 0.1~0.3g/L | |||
| Brightener 96 | 5m/L | 5m/L | 5m/L | 5m/L |
| Anode material | 1# pure zinc | 1# pure zinc | 1# pure zinc | 1# pure zinc |
TECHNICAL PROCESS:
Acidic degreasing and derusting → rinse → alkaline chemical degreasing → hot-water washing → flowing cool water washing → activate(10%HCl) → rinse → bright zinc plating → recycle → rinse → neutralization (2~3% HNO3) → low-chrome passivation → rinse → drying (60~80ºC)
BRIGHTENER REPLENISHING:
1. On the natural working condition, when temperature range is 23~43ºC, brightener consumption is 100~150ml/KAH.
2. Replenishing brightener little and normally, when barrel plating, replenishing it within half an hour before leaving bath, it can assure stable quality and low brightener consumption.
