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CADGNO
BRIGHT CADMIUM PROCESS - 770
Cadgno
is a high
speed bright cadmium solution
which deposits
silvery bright
cadmium coating
at low
cost. Cadgno has the following
characteristics.
1. Improved deposit distribution and throwing power.
2. Heavier deposit without loss of brilliance or tendency
to form
nodules or tree.
3. Stable brighteners.
4. Extremely low porosity with high corrosion resistance.
5. Useful for vat & barrel processes.
6. Receptivity for Chrome passivation.
Make up quantities
For general purposes rack and barrel plating
Cadgno Bright Cadmimum salt
771
100 gm./lit.
Cadgno Brightner
772
10 ml./lit.
Purifier
203
(l) 02
ml./lit.
For high speed rack and barrel plating
Cadgno Bright Cadmimum salt
771b
175 gm./lit.
Cadgno Brightner
772
10-12 ml./lit.
Purifier
203
(l)
02
ml./lit.
Pperating Conditaions
771 process 771 b process
Density
8*
be
12*
be
Temperature
20-40*
c
20-40* c
Cathode C. D
1.0-3.0
am/sq.dm
0.5-3.0 am/sq.dm
Anode C. D.
1.0-3.0
am/sq.dm
1.0-3.0 am/sq.dm
Agitation
Cathode Recommended
Cathode Recommended
Filtration
Occasionally Occasionally
Voltage
for Vat
1.5-2.5
volts
1.5 - 2.5 volts
Voltage
for Barrel
8.0-14.0 volts
8.0 - 14.0 volts
Rate
of deposition
0.8 microns/minute-at 2.0 am/sq.dm
Maintenance
:
Cadmium
Metal Content, Caustic Soda and Sodium Cyanide should
be
Maintained
as follows by analytical control :
771 process
771 process
Cadmium Content as Metal
17-19 gm/lit. 20-22 gm/lit.
Total Sodium Cyanide
55-60
gm/lit.
120-125 gm/lit.
Total Caustic Soda
20-24
gm/lit.
25-30 gm/lit.
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