| Autor: |
Shabanova, I. N., Reshetnikov, S. M., Naimushina, E. A., Terebova, N. S., Kholzakov, A. V. |
| Zdroj: |
Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; Dec2021 Supplement, Vol. 15 Issue 1, pS186-S192, 7p |
| Abstrakt: |
The mechanism of the formation of a protective anticorrosion coating on the surface of unalloyed steel 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 corrosion-inhibiting 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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