YELLOW BRONZE is an alkali copper - tin - zinc cyanide
plating system, designed to deposit an alloy of 78% Cu, 16% Sn
and 6% Zinc. The deposit produced is hard, with a yellow - gold
2 N Color over a wide range of operating conditions. Because of
its exceptional properties yellow bronze solution may be used as
both final finish or pre gold undercoat. Used as under coat, it
An improvement in brightness and reflectivity of
work piece with better corrosion properties .
A reduction in thickness of gold , while
preserving the yellowness of gold even after wear .
A replacement for Nickel , which often causes
allergies and not permitted in certain applications .
Yellow Bronze and
over nickel plated ring
plated rings with
gold flash coating
Yellow bronze may also be
used as a final finish, where it is a suitable imitation gold
for bathroom fittings, furniture hardware etc where cost of
precious metal plating is prohibitive. By varying the alloy
composition white bronze can be plated. It is very good
replacement for nickel plating.
The yellow bronze process is a
very stable and easy to control .
Composition - copper - 78%, zinc - 6%, tin
Appearance - bright, even gold
color close to 2N
- 250 - 350 HV
- 8.5 (1 um/dm2 of alloy weight approx. 85 mg)
bronze solution is supplied as ready to use solution. Fill the perfectly cleaned PP tank with
yellow bronze to working level.
Heat to 45 0C
. The bath is now ready to work.
OPERATING CONDITIONS :-
Bath density (on
make up )
1.133 1.112 - 1.13
12.7 12.4 - 13.0
45 39 - 47
density (A/dm2) 1.5
0.5 - 3.0
Efficiency 15 - 18
Pure Graphite or stainless steel.
Speed 0.4 Um/min at 1.5
Equivalent to 1um in 2.5 minute
Tanks should be
made from PP or high density polyethylene .Rectifier should be
fitted with continuous current regulation and ammeter suitable
for the surface area to be plated and either an ampere hour or
ampere minute meter. The ripple should be less than 5% Immersion
heaters should be sheathed with porcelain; quartz of PTFE
Thermostatic control should be within +/- 10C
.Filtration should be magnetically coupled pump and PP filters
with 5-micron filter cartridge must be used. The pump rate
should be 3 - 5 tank turn overs / hour .Agitation may be back
and forth cathode bar movement at 5 - 8 m / min or by
alternating, controlled speed circular motion .Anodes should be
nuclear grade pure graphite The anode surface area should be at
least double of cathode area. Don't use anode bags . Due to
presence of Cyanide in bath, efficient fume extraction must be
We supply chemicals and equipments required for yellow bronze
plating. Now yellow bronze plating is used for jewellery,
hardware and decorative items. We give complete technical
service to start your bronze plating. We have all laboratory
specialties to control all parameters required for good yellow
you want to start an bronze plating