A Practical System for Extending the Life of Gold Plating Baths by Donnan Dialysis
15 November 1987
The life of gold plating baths can be extended by removing the side product, potassium hydroxide, with Donnan dialysis. By using a cationic membrane, potassium ions generated from the replenishment of gold ions are exchanged with the hydronium ions, which then neutralize the hydroxide ions.