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Electroplating additives
Zinc plating addtitives
1. Brightener for Cyanide Zinc plating- Alkaline zinc-WBT20H
Characteristics:
1). It can get uniform and brilliant deposit. It is very suitable for Color chromating in low chromium solution and bright blue passivation.
2). Developed for rack and barrel. Especially for barrel.
3). Aldehydes-free. With good stability. Low-consumptions
Bath instruction：
| Bath solution |
Range of Use |
Low cyanide |
Medium cyanide |
High cyanide |
ZnO |
10~15g/L |
15~25g/L |
35~45g/L |
NaCN |
12~20g/L |
25~40g/L |
70~90g/L |
NaOH |
100-130g/L |
80~100g/L |
80~100g/L |
Alkaline zinc -WBT20H |
3-4ml/L |
2-4ml/L |
2-4ml/L |
Melt Zinc |
8-12 g/L |
12-20 g/L |
28-36 g/L |
Temperature |
10-40℃ |
10-40℃ |
10-40℃ |
Current density (A/dm2) |
Rack |
1-5 |
1-5 |
1-6 |
Barrel |
0.5-2 |
0.5-2 |
0.5-2 |
Note: Cyanide: Zinc should be among 1.5-2.5.
2. Brightener for Alkaline non-cyanide Zinc process
1. Technology characteristics
1). The brightness range is very wide. For it can get bright coating under current density range of 0.2-2 A/d㎡.
2). Good dispersive property and great covering powder. For it can get equal coating on the complex workpieces, especially for barrel-plating.
3). Good compatibility. For it can be compatible with all kinds of zinc plating processes of alkaline zincates.
4). It doesn’t include aldehydes, and has features of good stabilities and low consumption.
2. Formula:
zinc oxide(ZnO) 8-12g/l
sodium hydroxide 100-120g/l
Brightener 2-3ml./l
Softening agent 1-2ml/l
Current density 0.5-5A/dm2
Anode material Number 0 Zinc
Assistant anode material iron panel, Nickel panel, etc.
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