Process Characteristics & Advantages
- High purity raw material preparation, minimal decomposition products, and good stability of plating solution
- The surface quickly becomes bright, with excellent brightness, high and uniform surface flatness, and strong coverage ability in low current density areas
- Specialized for hanging plating, clear type, easy to chrome, stable process, and convenient maintenance of plating solution
- Suitable for single-layer direct nickel or multi-layer nickel processes with high anti-corrosion performance requirements
- Fast brightening, excellent leveling, and high coating fullness.
- Good flexibility and high adhesion.
- Stable bath, long service cycle, low operating cost.
| Plating Solution Formula |
| Item |
Unit |
Range |
| Nickel Sulfate |
g/L |
200–300 |
| Nickel Chloride |
g/L |
45–60 |
| Boric Acid |
g/L |
40–50 |
| High-Speed Nickel Softener |
mL/L |
5–8 |
| High-Speed Nickel Brightener |
mL/L |
0.3–0.5 |
| Wetting Agent |
mL/L |
1–2 |
| Temperature |
℃ |
50–60 |
| pH |
- |
4.2–4.8 |
| Cathode Current Density |
A/dm² |
2–6 |
| 3. Solution Preparation |
- Fill a spare tank with half the working volume of water; heat to ~55°C.
- Add nickel sulfate and nickel chloride; stir to dissolve completely.
- Adjust pH to ~3 with 10% dilute sulfuric acid.
- Add 2.5 mL/L 30% hydrogen peroxide; stir 45 min.
- Adjust pH to ~5.4 with 4% NaOH; keep at 55°C.
- Add 2.5 g/L powdered activated carbon; stir 30 min, stand 4-5 h, filter.
- Add boric acid; stir to dissolve.
- Add water to full volume; adjust pH to 3.8 with 10% H2SO4
- Electrolyze 10 h at 0.2-0.4 A/dm2 with corrugated cathode (uniform color required).
- Add brightener, softener, wetting agent; electrolyze 20 min; start trial plating.
|
| 4. Solution Maintenance & Notes |
- Regularly analyze nickel, chloride, and boric acid; keep pH 4.2–4.8, temperature 50–60℃.
- Add brightener and softener in small, frequent doses.
- Ratio: Brightener : Softener = 1 : 1.2–1.5.
- Consumption:
- Brightener: 80–150 mL/KAH
- Softener: 100–180 mL/KAH
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Note: This manual is based on the company's experiments and data, for reference only.