BRILLIANT CYN ZINC BRIGHTNER - 265/275  
BRIGHT ZINC PROCESS  

Brilliant cyn zinc brightner 265 is a single brightner, specially formulated with bright zinc plating process for vat and barrel to provide   brilliant,  uniform, highly  corrosion   resistant   and pleasing  blush-white zinc deposites from a wide range  of  high, medium and low cyanide zinc plating bath formulations. This single brightner system shows good stability during working at  elevated temperatures and it is simple to operate and control. 

Salient features  

*    It can be used in baths with temperature ranging from 25 to 55  c  in both vat and barrel plating operations  and  this  minimises cooling requirements.

*    Produces     brilliant, lustrous, uniform, highly  corrosion resistant, chrome-like zinc deposits.

*    The brightner 265 is a concentrated formulation with  stable additives and has got minimum consumption of 80-1120 ml. And 120-150  ml.  Per  100 amp.-hr. In  vat  and  barrl  plating operation respectively.

*    The brightner system has extreme versatitlity and is  highly effective in conventional high cynide as well as medium  and low cyanide bath plating operations.

*    Zinc deposites, produced from the system, readily accept and conventional  chromate  passivation  treatment  from   blue, golden, olive  green  or  black  chromate  passivation. See zinchromate 61, 162l,  164  and  171   for   aestivation treatments.

Bath make up :

The brightner-265   produces an acceptable finish from a wide range of  bath compositions. It is advisable to maintain the zinc  bath within  recommended limits   in   order to   minimise   consumptions.  It is  advisable to maintain the zinc   bath    within     recommended     bath    make    up,   operating conditions,maintance of bath constituents are given as under :

Bath make up :                                                       high     medium       low

Cyn zinc salt-201/211/221             gm/lit.              200       110+10    100  

Brilliant cyn zinc brightner-265/275  ml/lit.              2-4        2-4           2-4

Cyn zinc purifier-203 (l)                 ml/lit.                2            2              2 

Working condition                                                 high        medium        low

Density *be                                                        18-24         8-12        7-11

Temperature *c                                                   25-55        25-55       25-55

Cathode current density:

Vat amp/sq.dm                                                   2-6          2-6         2-6

Barrel amp/sq.dm                                               0.5-2        0.5-2       0.5-2

Voltage - vat                                                       2-6          2-6         2-6

Voltage - barrel                                                  10-15        10-15       10-15

 filtration                                                     occasionally  occasionally  occasionally

Agitation - vat                                                   cathode       cathode       cathode

                                                                    movement      movement      movement

Fume extraction                                       recommended   recommended   recommended

Rate of deposition at                                      0.4 micron    0.35 micron   0.35 micron

2 amp/sq.dm.per minute

Maintenance

Zinc metal           gm/lit.                      32 + 4      20 + 5       10 + 5

Total sodium cyanide gm/lit.                90 + 15     50 + 15     15 + 5

Total caustic soda   gm/lit.                  72 + 12     70 + 10     75 + 10  

Ratio cyanide:metal                           2.82:1.0     2.5:1.0      1.5:1.0