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X-Ray Photoelectron Study of the Mechanism of the Anticorrosion Effect of Benzotriazole and Mercaptobenzothiazole Additives to Mineral Oilстатья
- Авторы: Shabanova I.N., Reshetnikov S.M., Naimushina E.A., Terebova N.S., Kholzakov A.V.
- Журнал: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
- Том: 16
- Номер: 2
- Год издания: 2022
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 376
- Последняя страница: 382
- DOI: 10.31857/S1028096022040148
- Аннотация: The mechanism of the formation of a protective anticorrosion coating on the surface of unalloyedsteel treated with solutions of benzotriazole (BTA) and mercaprobenzothiazole (MBTA) in oil is studied by X-ray photoelectron spectroscopy (XPS). The anticorrosion effect of the mineral-oil compositions is demonstrated to be mediated by the formation of adsorption layers on the surface of steel which prevent its contact with moisture and aggressive chemical species. Using a Monicor corrosion monitoring meter, the protective effect of such composites is studied in a model corrosion medium which imitates the humidity condensate typical of industrial cities. The protective effect of our mineral-oil compositions containing the corrosioninhibiting additives BTA and MBTA at concentrations of 1–5 wt % fully emerges only after the protective layer is heated to 50–150°C. The results of XPS analysis suggest the formation of chemisorption bonds between surface iron atoms and nitrogen atoms of the BTA molecule and nitrogen and sulfur atoms of the MBTA molecule at the indicated temperatures. This interaction between the atoms of inhibitor molecules and the iron atoms leads to the formation of a compact protective layer of mineral oil on the steel surface.
- Добавил в систему: Теребова Надежда Семеновна