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Corrosion behavior and EIS study of steel in an alkaline medium containing chlorides with Catechol inhibitorстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
- Авторы: Kasatkin V.E., Kasatkina I.V., Korosteleva I.G., Kornienko L.P., Dorofeeva V.N., Andreev N.N.
- Журнал: International Journal of Corrosion and Scale Inhibition
- Том: 12
- Номер: 4
- Год издания: 2023
- Издательство: Некоммерческое партнерство коррозионистов "Вакор"
- Местоположение издательства: Москва
- Первая страница: 1791
- Последняя страница: 1805
- DOI: 10.17675/2305-6894-2023-12-4-20
- Аннотация: There is information about the use of diatomic phenol C6H4(OH)2 as a corrosion inhibitor for steel reinforcement in concrete. Catechol (ortho-dihydroxybenzene) is the most effective of the three isomers in inhibiting steel corrosion. However, its mechanism of action is not well understood. In this publication, the corrosion and electrochemical behavior of unalloyed steel in a model solution of the pore fluid of concrete with a high content of chlorides is investigated. The electrochemical behavior of catecholadditives was studied under cathodic and anodic polarization on platinum and steel electrodes. From the polarization curves it is evident that the addition of catechol effectively reduces oxygen reduction currents and affects the ratio of oxidized forms of iron (Fe(II)/Fe(III)), but does not affect the potential of pitting formation on steel (Ep) at the same pH level of the solution with and without an inhibitor. Catechol oxidation occurs at potentials above -170 mV (Ag/AgCl), which is higher then Ep. The inhibitory effect of catechol was studied by the methods of linear polarization resistance, electrochemical impedance spectroscopy and classical gravimetry. An increase in the inhibitory effect was found with an increase in the concentration of the additive to 1 g/l and its decrease at 5 g/l of catechol. The mechanism of action of the inhibitor is discussed.
- Добавил в систему: Касаткин Вадим Эдуардович