W-75 Black Nickel Gun Color Chemical
W-75 Black Nickel is kind of tin and nickel alloy, this process is widely applied for various decorative playing to acquire a black layer; it can be used on antic brass and antic copper.
Feature:
1、 This process does not contain any poisionous material and it is helpful for safe production.
2、 The blackness on high and low current area are even and unified, with stable color and easy operation.
3、 It is suitable for both rack and barrel plating.
2. Condition and Composition
W-75C Conducting Salt |
150g/L |
W-75A Salt |
60g/L |
W-75B Salt |
30g/L |
Nickel Chloride |
30g/L |
PH Value |
8-9 |
Temperature |
30-40℃ |
Cathode Current Density |
0.5-2A/d㎡ |
Time |
40-90 Seconds(rack) 5-8 Mins(barrel) |
Anode |
Graphite Plate |
Stirring |
Cathode Moving |
Opeartion after plating
Washing is make it clean and to prevent tarnishing, please go through Potassium Dichromate solution for passivation. This process requires lacquer sealing, or elase, layer will get oxidization.
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