1. Properties
1. The appearance of the coating is gray and crystallization meticulous, The cathode current efficiency is 30%.
2. The performance of plating to milky white chromium is similar but high deposition speed at 2~3 times.
3. Coating hardness is up to 750Hv above well above milky white chromium and non-micro crack.
4. It is widely used in engineering machinery, automobiles, etc.
5. The processes of double chrome plating are formed by FI-5680 Hard Chromium Plating Additive. It can obtain an excellent corrosion resistance and hardness chromium layer.
2. Bath composition & Operation condition
|
|
Operation range |
|
CrO3 |
360~420g/L |
|
H2SO4 |
5.0~8.0g/L |
|
FI-5685A |
35~45ml/L |
| FI-5685B | 55~65ml/L |
|
Temperature |
24~28℃ |
|
Cathode current density(Dk) |
15~40A/dm2 |
|
Anode |
Lead-tin alloy (8~20% tin content) |
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