A. V. Guntsov, N. V. Khlynova
ABSTRACT
The processes of growth and dissolution of nucleus and a film of a deposition on a solid electrode are considered. The results of solving diffusion problems on the growth and dissolution of hemispherical nuclei and a thin film of precipitate are presented. The equations of volt-ampere curves, chronoamperograms for reversible, irreversible and quasi-reversible electrode processes, ratios for the peak current, the quantity of deposition at the electrode, the peak current potential and the half-peak width of the current-voltage curve from the parameters of pre-electrolysis are given. The processes of the formation of a new phase at the solid-liquid interface, the mass-exchange processes at the electrode–low-soluble film interface, and the low-soluble film–solution boundary are discussed. The results of an experimental study of anode films are considered. There is linear dependency of the quantity of the forming compound on the electrode surface from the concentration of the ions and from the time of the pre-electrolysis in case of growing a nuclei or a thick anodic film.
KEY WORDS
electrodeposition, electrodissolution, nucleus, film, deposition, peak current, solid electrode.