Gold Bath
A solution of gold used for depositing the metal in the electroplating
process.
A great number of formulae have been devised, of which a few
representative ones are given here.
COLD BATHS. HOT BATHS.
Water, 10,000 10,000 10,000 10,000 5,000 3,000
Potassium Cyanide, 200 – 200 10 – 50
Gold, 100 15 100 10 10 10
Potassium Ferrocyanide, – 200 – – 150 –
Potassium Carbonate, – 150 – – 50 –
Ammonium Chloride, – 30 – – 20 –
Aqua Ammoniae, – – 500 – – –
Sodium Phosphate, – – – 600 – –
Sodium Bisulphite, – – – 100 – –
(Roseleur.)
In the baths the gold is added in the form of neutral chloride, Auric
chloride (Au Cl6).
