Activation-passivation transition for the anodic dissolution of metals

Authors
Popov, YA Sakha, S
Citation
Ya. Popov et S. Sakha, Activation-passivation transition for the anodic dissolution of metals, RUSS J PH C, 74(3), 2000, pp. 460-463
Citations number
6
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY
ISSN journal
00360244 → ACNP
Volume
74
Issue
3
Year of publication
2000
Pages
460 - 463
Database
ISI
SICI code
0036-0244(200003)74:3<460:ATFTAD>2.0.ZU;2-D
Abstract
A theoretical model is developed for describing the transition of metals fr om the state of active dissolution in electrolytes to the state of passivat ion. The model predicts a significant drop in the anode current density wit hin a narrow potential range. This is due to the formation of two-dimension al islets of passive oxide at the metal surface. The dependence of the kine tic characteristics of this process on the anode potential and energetic in homogeneity of the surface is taken into account.