In October I’ve studied the electrodeposition process. I lead the process of potentiostatic deposition of Zn-Mo alloy layers, on the steel and copper surfaces, from stable homogeneous Zn(II)-Sn(II)-Mo(VI) and Zn(II)-Mo(VI) citrate baths, in the slightly acid range (pH about 5), with different concentration of metals and citrate ions. The measurements were performed in a three-electrode cell or galvanostatically in a two-electrode cell in coulostatic condition, by means of potentiostat PGSTAT302N.