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| This additive is a light yellow or brown liquid developed by combining the merits of Sn-salt and Ni-Salt bath. It can stabilize Sn+2 ion in the solution and has nice uniformity and reproducibility in color. The storage time of this additive is in one year, when kept in a place avoiding of light. | ||
| 1. Bath Composition: | ||
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BY-C11B H2SO4 Sulphuric acid SnSO4 Nickel sulfate Deionized Water |
50 g/L 15 g/L~20 g/L 8 g/L~12 g/L 18 g/L~22 g/L Margin |
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| 2. Operational Parameters: | ||
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Voltage Temperature pH value Time |
15 V±2 V 20 ℃±5 ℃ 0.8~1.2 30 s～15 min |
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| 3. Bath Maintenance: | ||
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(1) Analyze the pH value and contents of free H2SO4 and SnSO4 daily, recompensed SnSO4, NiSO4 and H2SO4 in accordance with processing requirement. The compensation ratio between BY-C11B and SnSO4 is 2:1. |
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