Black Pearl coating ; Sn-Ni Alloy Nickel Plating Chemicals Salt A
1. Properties
1. An elegant and unique “Gun-color” deposit can be obtained on the bright Nickel layer. At present, it is popular on the international market, widely used on light industrial products, such as watches, lamps, leather decorations and so on.
2. The deposit has good hardness and resistance to abrasion.
3. The technique is stable, suitable for both rack and barrel plating.
2. Technical Formulation and Operating Condition
Potassium Pyrophosphate K4P2O7 | 200~250g/L |
“Gun-color” Powder A | 25~30g/L |
“Gun-color” Agent B | 35~40g/L |
“Gun-color” Stabilizer | 1~2g/L |
Temp. | 40~45℃ |
PH | 8.5~9.5 |
Anode | Graphite |
Dk | 0.1~2A/dm2 |
Cathode replacement | Required |
3. Technical Formulation for Passivation
Chromic acid 50g/L
Temp. Room temp.
Time 20~30’s