FI-5108 Zinc Alloy Non - Cyanide Alkaline Copper Preplating
The FI-5108 Non - cyanide alkaline copper plating process is an environmentally friendly process developed for preplating copper on zinc alloy die castings.
1. FEATURES AND ADAPT RANGE
1.1 Non - Cyanide, suitable for preplating of zinc alloy die-casting substrate;
1.2 With excellent dispersion and coverage ability, with a fine, smooth, soft layer and a certain degree of brightness;
1.3 The surface of the layer is not hydrophobic and does not require film removal. It can be directly plated with nickel or other metal plating .
2. SOLUTION COMPOSITION AND PROCESS PARAMETERS
2.1 Process flow:
Pre-treatment → Activation → Washing → Presoak (FI-5108D) → Copper plating (FI-5108) → Post process
2.2 Composition of Presoaking
| Item | Range | Temp. | pH value | Time |
|
FI-5108D
|
180～220ml/L
|
normal temperature |
5.5～6.5
|
10～30 s
|
2.3 Composition of plating solution
| Item | Range | Optimal |
| Copper Sulfate |
25～40g/L
|
30 g/L |
| FI-5108Mu |
500～600ml/L
|
500 ml/L
|
| FI-5108A |
5～15ml/L
|
10 ml/L |
| FI-5108R |
40～60 ml/KAH
|
50 ml/KAH
|
| Temp. |
50～60℃
|
55℃
|
|
pH
|
10.5～11
|
10.8
|
| Cathode current density |
0.5～3.0 A/dm2
|
2.0 A/dm2
|
| Anode |
Electrolytic copper
|
Electrolytic copper |
| Anode area: cathode area |
1.5～3:1
|
2.5﹕1
|
| Filter | continuous | continuous |
| Stir | Air or mechanical stirring | Air stirring |
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