Environmental Cyanide-Free Zinc Plating Process (HN-NH)

Product Specifications

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

Product Description

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/dm2 2 – 6V	15– 40 °C 0.5 ~ 2 A/dm2 6 – 12V

 
 
 
 
 
 
 
 
 
 
 
 
 
2.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.
 
3.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.