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Formation of Passivating Layers by 1,2,4-Triazole Derivatives on Copper in Aqueous Solutionsстатья
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: 22 февраля 2018 г.
- Авторы: Kuznetsov Yu I., Shikhaliev Kh S., Agafonkina M.O., Andreeva N.P., Semiletov A.M., Chirkunov A.A., Potapov A.Yu, Solov’ev V.E.
- Журнал: Russian Journal of Physical Chemistry A
- Том: 91
- Номер: 12
- Год издания: 2017
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 2458
- Последняя страница: 2465
- Оригинальные версии: Формирование пассивующих слоев замещёнными 1,2,4-триазола на меди в водных растворах и защита ими её от атмосферной коррозии
- DOI: 10.1134/S0036024417120147
- Аннотация: Ellipsometry and electrochemical measurements are used to study the adsorption of some substituted 1,2,4-triazoles on copper and their effect on dissolution of copper in aqueous buffer solutions at pH 7.4. It is found that the adsorption of triazole compounds on copper is polymolecular at potential Е = 0.0 V, in relation to a normal hydrogen electrode. The first layer is described by the Temkin equation with free adsorption energy (−ΔGa0) = 55.2–76.3 kJ/mol and an energy heterogeneity factor that varies from 0.91 to 2.5. The maximum value of −ΔGa0 is found for an acid and a hydrogen sulfide corrosion inhibitor that is a mixture of triazole derivatives. The same inhibitor is the one least sensitive to the energy heterogeneity of the surface of a copper electrode, due to its high chemical reactivity and ability to be adsorbed on different active sites. This inhibitor is likely chemisorbed on copper and forms an ultrathin coating in an aqueous solution that is vastly superior to similar coatings produced by the familiar corrosion inhibitors of triazole group compounds in protecting against atmospheric corrosion.
- Добавил в систему: Агафонкина Марина Олеговна