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Unispec - 6
Unispec - 6 is a high performance twin additive system for Bright Nickel Plating especially designed for high speed plating, fast levelling, sharp white brightness, superior coverage and excellent chrome receiptivity producing very ductile deposits over a wide range of current densities. Suitable for use in moving cathode, barrel and air agitated systems. Two liquid components Unispec - 6 and Nickel Additive 22 / Nickel Additive 232 are required for make-up and regular replenishment.
SOLUTION COMPOSITION AND MAINTENANCE
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Watts Bath High Sulphate
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High Chloride Bath
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Unit |
Range |
Optimum |
Range |
Optimum |
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gm/l |
240-300 |
260 |
105-135 |
120 |
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gm/l |
55-70 |
60 |
175-214 |
200 |
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gm/l |
40-50 |
45 |
40-50 |
46 |
| OR |
- Spectra Bright Nickel Salt
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gm/l |
250-400 |
350 |
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|
| OR |
- Spectra High Chloride Nickel Salt
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gm/l |
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320-400 |
365 |
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gm/l |
64-81 |
70 |
64-81 |
75 |
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Rack Plating
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Barrel Plating
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ml/l |
8.0-10.0 |
10.0 |
8.0-10.0 |
8.0 |
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ml/l |
0.1-0.4 |
0.25 |
0.1-0.3 |
0.2 |
Note:Nickel Additive 232 should be preferred because of its superiority over its earlier equivalents and in such case its makeup addition would be 5 - 8 ml/l.
OPERATING CONDITIONS
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Rack Plating
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Barrel Plating
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oC |
50-65 |
55 |
45-55 |
50 |
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Electrometric |
4.0-4.6 |
4.4 |
3.8-4.2 |
4.0 |
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A/dm2 |
2.0-6.0 |
4.0 |
0.2-2.0 |
1.0 |
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A/dm2 |
1.0-3.0 |
2.0 |
0.5-2.0 |
1.0 |
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Volt |
4-8 |
5.5 |
10-16 |
12 |
AGITATIONLow pressure air or cathode rod movement.
FILTRATIONMinimum 3-4 solution turnovers per hour. However, 4 to 6 are preferred in dusty environments.
ANODESCast carbon or Electrolytic Nickel Rolled anodes or Nickel rounds/pellets in bagged titanium baskets. Anode to Cathode Ratio. 2 : 1
REPLENISHMENT
| Rack Plating |
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90-150 ml. per 1000 Amp. Hours |
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120-250 ml per 1000 Amp. Hours |
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100-200 ml per 1000 Amp. Hours |
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| BARREL PLATING |
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100 to 175 ml/1000 Amp. Hours |
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120 to 250 ml/1000 Amp. Hours |
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100 to 200 ml/1000 Amp. Hours |
Note:Trouble shooting guidelines
- Ductility: To improve, add Nickel Additive 22S.
- Pitting: To reduce pitting, add Antipit No. 1.
- LCD Blackening: To remove, add Nickel Additive 52.
DISCLAIMER: Our recommendations are made in good faith and are based on our skills. However, since the conditions of use of these products are beyond our control, this information is given on the express condition and agreement that Grauer & Weil (India) Limited, will not be liable to any person by reason thereof. Nothing herein shall be deemed to be a recommendation to use any product in violation of any existing patent rights.
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