Control of the inhibiting capability of a spiropyran in anodic dissolution of lead in water–acetonitrile environment by light flux

• V. V. Ekilik, K. S. Tikhomirova and A. G. Berezhnaya

Southern Federal University, ul. Zorge 7, Rostov-on-Don, 344090 Russian Federation

Abstract: It has been found that the inhibiting effect of a spiropyran is enhanced under illumination and that this enhancement increases with the spiropyran concentration. The anodic dissolution of lead and cathodic reduction of films in water–acetonitrile media has been studied as a function of electrolyte nature and water content. It has been determined that the passive state of lead starts before the corrosion potential and changes to local depassivation, while water has an activating effect.

Keywords: photocontrolled inhibitor, spiropyran, lead, water–acetonitrile solutions of tetrabutylammonium and lithium perchlorates, anodic dissolution, depassivation, repassivation

Int. J. Corros. Scale Inhib., 2012, 1, no. 2, 80-85 PDF (677 K)
doi: 10.17675/2305-6894-2012-1-2-080-085

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