Electrochemical mechanism of metall corrosion
https://doi.org/10.31615/j.corros.prot.2021.99.1-4
Abstract
Corrosion that occurs by an electrochemical mechanism is a combination of cathodic and anodic reactions that occur independently of each other. At that, the metal surface is considered to be equipotential one, i.e. the presence of short-circuited microgalvanic pairs on the surface is not a necessary condition for electrochemical corrosion. The anode and cathode processes are spatially separated. This is provided by the presence of conduction electrons in the interstitial spaces of the metal lattice. The present model of electrochemical corrosion justifies the use of polarization diagrams for the analysis of corrosion processes. The previously proposed model, based on the idea that a necessary condition for electrochemical corrosion is the presence of short-circuited microgalvanic elements on the metal surface, is erroneous. When considering electrochemical corrosion from the positions of this model, the use of polarization diagrams to study corrosion processes is not legitimate.
About the Authors
A. N. Podobayev
Moscow Polytechnic university
Russian Federation
Russian Federation
Alexander N. Podobayev, Doctor of Chemistry, Professor
38, Semenovskaya st., Moscow, 107023
I. I. Reformatskaya
Academy of the State Fire Service Emercom of Russia
Russian Federation
Russian Federation
Irina I. Reformatskaya, Doctor of Chemistry, Professor
4, Borisa Golushkina st., Moscow
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Review
For citations:
Podobayev A.N., Reformatskaya I.I. Electrochemical mechanism of metall corrosion. Theory and Practice of Corrosion Protection. 2021;26(1):41-47. (In Russ.) https://doi.org/10.31615/j.corros.prot.2021.99.1-4
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