The material serving as the cathode is principally a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series.

The material serving as the cathode is principally a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series.

Finally, the alkali metals are at the top of the electrochemical series, whereas the coinage metals are almost at the very bottom.

However, a more reactive metal in the electrochemical series must be chosen for coating, especially when chipping of the coating is expected.

An improved apparatus and method for recovering metallic silver from solutions containing silver ions by reducing silver ions and oxidizing an element in the electromotive series above silver, such as iron.