The formation of Ag₂CrO₄ films on silver electrodes takes place through a dissolution-precipitation mechanism. The early stages of growth of the salt film involve a three-dimensional nucleation process with growth controlled by diffusion of chromate ions. After nucleation, the growth is controlled by the resistance of the electrolyte in the pores of the layer until the surface is almost completely covered. The passive film formed under ohmic control is porous and further growth occurs under diffusion control of chromate ions into the pores. The properties of passivating layers depend on the formation conditions. Changes of the film electric properties with time are associated with variations in the layer structure.