720 Micro-cobalt Gunmetal Color Electroplating Process

1. The coating is black and bright, with good hardness and lasting color. 2. The plating solution is stable, easy to control, strong covering ability, and can be used for rolling and hanging plating. 3. Suitable for any black decorative items, such as jewelry, clocks, belt buckles, spectacle frames, mobile phone panels and other electroplating processing purposes.

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Product Description

Solution composition and operating conditions

Parameters	Scope	best value
Metallic Tin	0.3-0.5g/l	0.4g/l
Cobalt Metal	1.0-1.5g/l	1.2g/l
conductive salt	180-220g/l	200g/l
720A Additive	120-140 ml/l	130 ml/L
720B Additives	10-20 ml/l	15 ml/l
cathode current density	0.5-1.0 Amps/square decimeter	0.7 amps/square decimeter
Temperature	40-50℃	45℃
pH	9.5-10.5	10
ratio of yin and yang	1：1-1：2	0:01:02
Bomedo	20-24	22
anode	Graphite
Stirring	Bath circulation plus mechanical stirring
Filtration	Filter bath at least four times per hour
Heating	Use quartz or titanium electric pen and thermostat
Plating tank	PVC or PP high temperature resistant material
Rectifier	Standard DC power supply with ampere-minute, voltage and current regulator