Gold Plating Services’ ECO 24K Pure Gold Plating Solution operates at a high cathode efficiency producing a pure gold deposit which meets ASTM B488. This cyanide free, sulfite gold complex solution produces a lustrous to bright gold deposit with relatively low internal stress. This type of high purity, (99.99% gold purity), deposit is typically used in the medical, semi-conductor, electronic, and PWB industries where soft, high purity gold is required. Note: Due to the grain structure of this type of gold deposit the reflective qualities of the surface will become noticeably “matt” with increased thickness.

Gold Content- 0.25 – 1.5 Troy oz. per gallon, as per customer specification
Purity - 99.99+ percent gold minimum (24 karat)
Hardness Knoop hardness < 90 (typically 55-60)

 

Operating Conditions

Range

Temperature 45° - 60° C (115° – 140° F)
Anode to Cathode Ratio 1:1 (or higher)
Specific Gravity 9 – 28 Be
PH (electrometric) 8.5 – 10.5 (optimum 9.5)
Time to deposit 0.0001’’ (2.5 micron) 13 minutes at 3 ASF (depending on conditions)
Efficiency 95 - 120-mg/ampere minute
Filtration Continuous
Hardness 60 – 80 Knoop
Current Density 3 amperes per square foot, (20 ma/in2 )
Anode Platinized titanium (preferred), or Type 316 stainless steel
Agitation Moderate relative Cathode to solution movement

 

NOTES:

To insure consistency of deposit, the following operating conditions should be controlled;

METAL CONTENT, maintain within 20% of specified operating conditions.
TEMPERATURE, maintain within 5% of specified operating conditions.
PH, maintain within 5% of specified operating conditions.
CURRENT DENSITY, Maintain within 5% operating conditions.