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Effect of Fe(III) salts on the protection of low carbon steel in sulfuric acid solutions by some corrosion inhibitorsстатья
- Авторы: Avdeev Ya G., Panova A.V., Anfilov K.L.
- Журнал: International Journal of Corrosion and Scale Inhibition
- Том: 13
- Номер: 2
- Год издания: 2024
- Издательство: Некоммерческое партнерство коррозионистов "Вакор"
- Местоположение издательства: Москва
- Первая страница: 1135
- Последняя страница: 1145
- DOI: 10.17675/2305-6894-2024-13-2-26
- Аннотация: The effect of Fe(III) salts on the protection of mild steel 08PS in 2 M H2SO4 and 2 M H3PO4 at 20 and 60°C by corrosion inhibitors (PKU-E, Catapin A, Catapin BPV, Soling m. Z, Soling m. L, VNPP-2, Invol-2 m. A and NORUST CM 150 C) has been studied. None of the individual corrosion inhibitors studied can provide efficient protection of steel in H2SO4 and H3PO4 solutions if significant amounts of Fe(III) salts are accumulated in them. In H3PO4 solutions containing Fe(III) phosphate, efficient protection of steel can be obtained by the formulation comprising 2 g·L–1 VNPP-2+0.5 mM KNCS+200 mM hexamethylenetetramine as the corrosion inhibitor. The same formulation protects steel in 1 M H2SO4+1 M H3PO4 (20 and 60°C) with up to 0.10 M Fe(III) cations accumulated in it. Solutions of an H2SO4+H3PO4 mixture inhibited by the formulation of VNPP-2+KNCS+hexamethylenetetramine can be an alternative to inhibited solutions of individual H2SO4 in case of potential accumulation of Fe(III) sulfate in them.
- Добавил в систему: Авдеев Ярослав Геннадиевич