24K Pure Gold Solution - TDS 2024
Gold Plating Services’ 24K Pure Gold Solution is an extremely efficient (cathode efficiency 98%+), neutral pH, water-clear gold plating solution designed to produce a gold electro-deposit of 99.9+% purity to virtually any desired thickness. It is primarily used for surfaces 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 matte with increased thickness.
This solution is fabricated with a purity and hardness of electrodeposited gold that meets Type III, Grade A specifications, as indicated in MIL-DTL- 45204D as follows:
Temperature - 120° - 150°F, 48° - 65°C (optimum 150°F/65°C)
Anode to Cathode Ratio - 2:1
Suggested Voltage - 1.5 V (Voltage may vary if current driven)
Current Density - 3 amperes per square foot, (20 ma/in²)
pH (electrometric) - 5.8 – 6.4 (optimum 6)
Time to deposit 1 micron on 1 in² - 5.5 minutes at 3 ASF
Solution gold content - Recommend maintaining 2g/liter
Replenishment - Add Gold Replenisher Solution as needed
Efficiency (Deposit Rate, Weight) - 115-mg/ampere minute
Filtration - Continuous, for large scale plating
Hardness - 60 – 80 Knoop
Anode - Platinized Titanium or Bagged Graphite
Agitation - Moderate relative Cathode to solution movement
Shelf Life - If stored at room temperature, properly sealed solution has a shelf life of about 2 years.
NOTES:
To ensure 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. pH will slowly rise during operation. To lower the pH, use Pure Gold pH Control. Add slowly, as there is often a delayed reaction.
CURRENT DENSITY- maintain within 5% of specified operating conditions.
Contact us for more details on how to calculate deposit thickness.