we’ve developed and applied many gold plating processes. We use electro-deposition, which is commonly known as electroplating and uses an electric current to apply the coating. We also use immersion plating, which doesn’t use electricity.
To plate an item with electro-deposition, we connect the gold to the anode, the positively charged electrode, of an electrical circuit. We also connect the substrate, the material that we’ll be plating, to the cathode, which is the negatively charged electrode. We then immerse both pieces in an electrolytic solution.
Then, we apply a DC current to the anode. This oxidizes the metal atoms in the gold and dissolves them into the solution. The dissolved ions are reduced at the cathode, and they then deposit onto the substrate.