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| Supplier: | Sur-Precision Metal Technology Co., Ltd. |
|---|---|
| Price: | Negotiable/Piece |
| Min Order: | 500KGS |
| Quantity:: | |
| Trade Terms: | FOB,CFR,CIF |
|
|
| Prod Model: | HN-NH |
|---|---|
| Markets: | South America,Southeast Asia,Africa,Mid East,Eastern Asia |
| Components: | 3 Items: Hn-Nh1,Hn-Nh2, Refiner Hn-Nh3 |
| Classification: | Chemical Additives |
| Appearance: | Liquid |
| Color: | Yellow |
| Type: | Metal Finishing Additive |
| Efficacy: | Metal Finishing Additive |
1.Make up the zinc plating solution
1) In the plating tank 20% of the volume is filled up with tape water, then caustic soda are added into the tank with stirring until completely dissolved;
2)After that, zinc oxide is added in slowly, stirring the solution until it is completely dissolved;
3) While the zinc oxide are dissolved completely, then fill the tank to final volume with water;
4)Finally adding the required quantity of brighteners, after several hours electrolyze, the solution is ready for using.
2.Functions and addition of the brightener
brightener HN NH 1:Full bright and brilliant zinc deposit can be obtained in wide range of current density; It will become dull and black on LCD Area when the brightener NH-NH1 is less; If the brightener NH-NH1 is too much, the adhesion will decrease or bubble will appear on zinc deposit.
brightener HN NH 2: It will improve the brightness or leveling and avoid to get burnt on HCD Area. The MCD Area will dull or the HCD Area will get burnt, if the brightener NH-NH 2 is less; If the brightener NH-NH2 is too much, the adhesion will decrease or bubble will appear on zinc deposit.
| Bath composition & Technical Data |
Rack plating |
Barrel plating |
|
Zinc Oxide ( ZnO) Sodium Hydroxide(NaOH) |
6 - 12 (g/l) 100 –140 (g/l) |
8 – 12 (g/l) 110 –140 (g/l) |
|
brightener HN –NH 1 brightener HN - NH 2 refiner HN-NH 3 |
12 (ml/l) 8 (ml/l) 1~2(ml/l) |
12 (ml/l) 8 (ml/l) 1~2(ml/l) |
|
( Temperature ) (Current density) (Voltage) |
15– 40 °C 0.5 ~8 A/dm 2 2 – 6V |
15– 40 °C 0.5 ~ 2 A/dm 2 6 – 12V |
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