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Adsorption and protective properties of alkylmalonic acids’ derivatives on zinc in a neutral chloride solutionстатья
- Авторы: Agafonkina M.O., Kuznetsov Yu I., Andreeva N.P., Shikhaliev Kh S., Kovygin Yu A.
- Журнал: International Journal of Corrosion and Scale Inhibition
- Том: 13
- Номер: 4
- Год издания: 2024
- Издательство: Некоммерческое партнерство коррозионистов "Вакор"
- Местоположение издательства: Москва
- Первая страница: 2438
- Последняя страница: 2453
- DOI: 10.17675/2305-6894-2024-13-4-30
- Аннотация: The adsorption of sodium malonate and its alkyl-substituted derivatives on zinc in a borate buffer solution with pH 7.4 and their protective effect on the oxidized surface of this metal in an aqueous solution of sodium chloride with a concentration of СNaCl=0.01 mol/L were studied. It was shown that their adsorption on zinc at E=0.2 V is adequately described by the complete Temkin isotherm equation. Sodium nonylmalonate anions have the highest standard free energy of adsorption (–ΔG0ads=76.7 kJ/mol), which is almost 2 times higher than for the malonate anions itself (38.7 kJ/mol). Such high values of (–ΔG0ads) indicate the chemisorption interaction of these organic anions with the oxidized surface of zinc. Corrosion tests of zinc plates in a chloride solution with addition of a three-component mixture containing sodium malonate+C2-malonate with 2-mercaptobenzimidazole showed high results: at Cin=0.004 mol/L, complete protection of zinc for 7 days can be achieved under natural aeration conditions of 0.01 M NaCl aqueous solution.
- Добавил в систему: Агафонкина Марина Олеговна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | ijcsi-2024-v13-n4-p30.pdf | 986,8 КБ | 4 декабря 2024 [AgafonkinaMO] | |
| 2. | Полный текст | ijcsi-2024-v13-n4-p30_HcDusqd.pdf | 986,8 КБ | 4 декабря 2024 [AgafonkinaMO] |