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The Effect of a Tangential Electric Field on the Formation of the Chemical Composition and Defect Structure of Complex Oxide Layers on Fe–18Cr Alloy Surfaceстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
- Автор: Kotenev V.A.
- Журнал: Protection of Metals and Physical Chemistry of Surfaces
- Том: 57
- Номер: 5
- Год издания: 2021
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 1097
- Последняя страница: 1104
- DOI: 10.1134/s2070205121050142
- Аннотация: The redistribution of the chemical composition and the defective structure at low-temperature (300°C) gas oxidation of Fe–18Cr alloy during an electrocontact superimposition of a tangential electric field on an oxidizing conductor have been studied by means of the methods of spectral ellipsometry, Raman spectroscopy, Auger electron spectroscopy, and photoelectron polarization. A strong activating effect of an external electric field has been recorded in the range of the vacuum degree (0.02 Torr) corresponding to the active–passive transition of the oxidizing alloy. It was manifested in an inhomogeneous distribution of the thickness, chemical composition, and defectiveness of the surface oxide over the conductor length. Upon a shift from the negative to the positive contact, one observed a drop of the concentration of oxygen vacancies, ordering of the structure, and enrichment of the oxide layer with chromium. During the superimposition of an external field, the concentration of vacancies and metal atoms at the metal–oxide interface was constantly reinitiated, which maintained a high rate of intercalation of chromium cations from the electrodiffusion zone of the metal into the oxide matrix. As a result, the release of chromium oxide Cr2O3 was recorded at the positive end of the conductor at the metal–oxide interface. All the above resulted in the maximum passivation of the metal on the positive electrode.
- Добавил в систему: Котенев Владимир Анатольевич