cpomaemКоррозия: защита материалов и методы исследованийTitle in englishИФХЭ РАН10.61852/2949-3412-2025-3-4-80-93cpomaem-123Research ArticleСтатьиАдсорбция и пассивация меди замещенными триазолами в нейтральных растворахAdsorption and passivation of copper by substituted triazoles in neutral solutionsАгафонкинаМ. О.AgafonkinaM. O.

119071, г. Москва, Ленинский проспект, д. 31, корп. 4

31-4, Leninsky prospect, 119071, Moscow

agafonkina@inbox.ruАндрееваН. П.AndreevaN. P.

119071, г. Москва, Ленинский проспект, д. 31, корп. 4

31-4, Leninsky prospect, 119071, Moscow

Федеральное государственное бюджетное учреждение науки Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)РоссияFrumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of SciencesRussian Federation202518122025048093Copyright © Агафонкина М.О., Андреева Н.П., 20252025Агафонкина М.О., Андреева Н.П.Agafonkina M.O., Andreeva N.P.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.cpmrm.ru/jour/article/view/123

В нейтральных буферных растворах на меди изучено адсорбционное и пассивирующее действие замещенных 3-амино-1,2,4-триазолов (3-R-3-АТ), содержащих электронодонорные или электроноакцепторные заместители. Соединения с электроноакцепторными заместителями R=C6H5- и C3H7SO2- обладают большей адсорбционной активностью, чем аналогичные соединения с электронодонорными R. Изотермы адсорбции C6H5-3-AT и 5-C3H7SO2-3-AT на окисленной поверхности меди в боратном буферном растворе при постоянном потенциале Е=0,0 В (н.в.э.) описываются полным уравнением Тёмкина с величинами свободной энергии адсорбции  (ΔGa,max0 )=93 и 96 кДж/моль, соответственно. Минимальная концентрация, подавляющая на меди первый пик активного растворения, у замещенных 3-R-3-АТ ниже, чем у самого 3-АТ.

The adsorption and passivation effects of substituted 3-amino-1,2,4-triazoles (3-R-3-AT) containing electron-donating or electron-withdrawing substituents on copper were studied in neutral solutions. Compounds with electron-withdrawing substituents R=C6H5- and C3H7SO2- exhibit higher adsorption capacity than similar compounds with electron-donating R. The adsorption isotherms of C6H5-3-AT and 5-C3H7SO2-3-AT on the oxidized copper surface in a borate buffer solution at a constant potential of E=0.0 V are described by the complete Temkin equation with free energies of adsorption 93 and 96 kJ/mol, respectively. The minimum concentration that suppresses the first active dissolution peak on copper is lower for substituted 3-R-3-AT than for 3-AT itself.

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