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VETO POWER
CY. ZINC BRIGHTNER 1520
BRIGHT ZINC PROCESS
Brilliant
cyanide zinc brightner 1520 is a single
brightner, with double strength specially formulated with bright
zinc plating process for vat an 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 stebility 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 1520 is a concentrated formulation with
stable additives
and has got minimum consumption
of 40-60 ml. And
600-75 ml.
Per 1000
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
cynide 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 161,
162l, 173
for passivation treatments.
Bath make up :
The brightner-1520 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 consuption.
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 gm/lit. 200
110+10
100
Cy. Zn.
Brightner-1520 ml/lit.
1-2
1-2
1-2
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 at
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
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