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Features of Corrosion of Low-Carbon Steel in a Flow of Acid Solutions of Various Anionic Composition Containing Iron(III) Saltsстатья
- Авторы: Avdeeva Ya G., Panova A.V., Andreeva T.E.
- Журнал: Russian Journal of Physical Chemistry A
- Том: 99
- Номер: 3
- Год издания: 2025
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 424
- Последняя страница: 437
- DOI: 10.1134/S0036024424703461
- Аннотация: Abstract—The corrosion of low-carbon steel in HCl, HCl + H3PO4, and H3PO4 solutions containing Fe(III) salts was studied. In the studied systems, steel corrosion occurs as a result of its reaction with an acid solution and Fe(III) salt. In the discussed environments, partial reactions of anodic ionization of iron and cathodic reduction of H+ and Fe(III) cations are realized on steel. The first two reactions are characterized by kinetic control, and the last one occurs in diffusion mode. The accelerating effect of Fe(III) cations on steel corrosion in the studied environments is mainly due to the reduction of Fe(III). The binding of Fe(III) cations into complex compounds with anions of the corrosive environment reduces the values of their diffusion coefficients (DFe(III)). The value of DFe(III) is maximum in HCl solution and minimum in H3PO4 solution. The rate of the partial cathodic reaction of Fe(III) reduction is determined by the value of DFe(III). As a result, the accelerating effect of Fe(III) on the cathodic reaction and, as a consequence, the general corrosion of steel ina flow of an aggressive environment is the most significant in a solution of HCl and is the least in a solution of H3PO4.
- Добавил в систему: Авдеев Ярослав Геннадиевич