CORROSION RESEARCH ROUND‐UP

Abstract

Effect of ultrasonics on electro‐deposition. Ultrasonics have no appreciable effect on the electrochemical reduction of Cr6+ to Cr0, but aid and accelerate that of Cr6+ to Cr3+ and of 2H+ to H2. The electrodeposition of chromium in an ultrasonic field is accompanied by an inconsiderable reduction (lower current density) and an increase (higher current density) in the cathodic current yield. The suggestion is confirmed that the reduction of chromic acid to metal proceeds from substances entering into the composition of a ‘movable’ cathodic film, the reduction of which is facilitated by their adsorbed state. A fairly extensive review of relevant literature is given, with 35 references, including effect on lowered potential in water dissociation, reduced hydrogen over‐voltage on polarisation curves, etc. In the present work special attention has been given to current yields in the case of chromium oxides and chromic acid, with micro‐photographs of the oxide surface.—(A. M. Ozerov, Zh. prikl. Khim., 1962, (1), 115–122.)

Citation

(1962), "CORROSION RESEARCH ROUND‐UP", Anti-Corrosion Methods and Materials, Vol. 9 No. 7, pp. 188-188. https://doi.org/10.1108/eb019983