cpomaemКоррозия: защита материалов и методы исследованийTitle in englishИФХЭ РАН10.61852/2949-3412-2025-3-1-85-96cpomaem-89Research ArticleСтатьиЗащитные и пассивирующие свойства антиржавейных присадок на низкоуглеродистой стали Cт3 в нейтральном хлоридном раствореProtective and passivating properties of anti-rust additives on low-carbon steel St3 in a neutral chloride solutionАндрееваН. П.AndreevaN. P.

Ленинский просп.31, корп. 4, Москва, 119071 

АгафонкинаМ. О.AgafonkinaM. O.

Ленинский просп.31, корп. 4, Москва, 119071 

agafonkina@inbox.ruИнститут физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)Россия202514042025018596Copyright © Андреева Н.П., Агафонкина М.О., 20252025Андреева Н.П., Агафонкина М.О.Andreeva N.P., Agafonkina M.O.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.cpmrm.ru/jour/article/view/89

Изучены пассивирующие и защитные свойства антиржавейных присадок КАП-25 и В-15/41 на низкоуглеродистой стали Ст3 в водных хлоридных и боратно-буферных растворах. Обе присадки способны самопроизвольно пассивировать стальной электрод и облагораживать потенциал локальной депассивации Ст3 в боратном буферном растворе с добавкой 0,01 М NaCl. Наиболее высокими пассивирующими свойствами обладает присадка В-15/41, у которой при 8 ммоль/л защитный эффект составляет 0,22 В. Композиции изучаемых присадок с 2-МБТ (9:1) оказывают более высокое защитное действие на низкоуглеродистой стали, чем сами индивидуальные вещества. В 0,01 М хлоридных растворах при 7 ммоль/л В-15/41+2-МБТ (9:1) Ст3 полностью защищена от коррозионного разрушения в течение 7 суток. Для полной защиты стали композицией NaКАП-25+2-МБТ (9:1) требуется 8 ммоль/л в 0,01 М растворе NaCl.

The passivation and protective properties of anti-rust additives KAP-25 and V-15/41 on lowcarbon steel St3 in chloride aqueous and borate-buffer solutions were studied. Both additives are capable of spontaneously passivating the steel electrode and improving the local depassivation potential of St3 in a borate buffer solution with the addition of 0.01 M NaCl. The highest passivation properties are possessed by V-15/41, which at 8 mmol/L has a protective effect of 0.22 V. The compositions of the studied additives with 2-MBT (9:1) have higher protective effects on low-carbon steel than the individual substances themselves. In 0.01 M chloride solutions at 7 mmol/L V-15/41+2-MBT (9:1) St3 is completely protected from corrosion destruction for 7 days. For complete protection of steel with the composition KAP-25+2-MBT (9:1) 8 mmol/L in 0.01 M NaCl solution is required.

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The authors declare that there are no conflicts of interest present.