corrosionprotectionПрактика противокоррозионной защитыTheory and Practice of Corrosion Protection1998-57382658-6797Association "CARTEC"10.31615/j.corros.prot.2025.118.4-1corrosionprotection-184Research ArticleМАТЕРИАЛЫ И ОБОРУДОВАНИЕ ДЛЯ ПРОТИВОКОРРОЗИОННОЙ ЗАЩИТЫMATERIALS AND EQUIPMENT FOR CORROSION PROTECTIONЗащита цинка в хлоридных растворах антиржавейной присадкой В15/41 и её композицией с 2-меркаптобензотиазоломZinc Protection in Chloride Solutions by Antirust Additive and its Composition with 2-mercaptobenzothiazoleАгафонкинаМ. О.AgafonkinaM. O.

Агафонкина Марина Олеговна, к.х.н., с.н.с.

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

Marina O. Agafonkina, Cand. Sci. in Chemistry, senior scientist

bld. 4, 31, Leninskiy pr., Moscow, 119071

magafonkina10@gmail.comАндрееваН. П.AndreevaN. P.

Андреева Нина Павловна, к.х.н., в.н.с.

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

Nina P. Andreeva, Cand. Sci. in Chemistry, leading researcher

bld. 4, 31, Leninskiy pr., Moscow, 119071

Институт физической химии и электрохимии имени А.Н. Фрумкина РАН (ИФХЭ РАН)РоссияFrumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS)Russian Federation202521012026304715Copyright © Агафонкина М.О., Андреева Н.П., 20262026Агафонкина 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.corrosion-protection.ru/jour/article/view/184

В настоящей работе изучены пассивирующие и защитные свойства антиржавейной присадки В-15/41 и ее композиции с 2-меркаптобензотиазолом (2-МБТ) на цинке в водном растворе хлорида натрия и боратном буферном растворе рН 7,4. Индивидуально В15/41 способен самопроизвольно пассивировать цинковый электрод и облагораживать потенциал локальной депассивации в боратном буферном растворе с добавкой 0,01 моль/л хлорида натрия. В отсутствие предварительного катодного восстановления цинка при Синг = 4,0…6,0 ммоль/л В-15/41 происходит формирование водорастворимых комплексных соединений аниона дикарбоксилата с поверхностными катионами металла. В случае применения композиции В15/41 с 2-МБТ (9:1) с увеличением ее концентрации возрастает и защитный эффект. Наиболее высокими пассивирующими свойствами обладает В-15/41+2-МБТ (9:1), у которой при 2,0 ммоль/л защитный эффект составляет 0,10 В. Эллипсометрическим методом определены толщины формирующихся защитных слоев В15/41 и ее композиции из ингибированного раствора. Из результатов коррозионных испытаний следует, что В15/41 при Синг=1 ммоль/л обеспечивает степень защиты цинка Z = 44%, а при возрастании Синг В15/41 степень защиты снижается. Совместное применение В15/41 с 2-МБТ (9:1) при Синг = 4 ммоль/л цинк полностью защищает от коррозионного разрушения в течение 7 суток.

In the present work, the passivation and protective properties of the antirust additive V-15/41 and its composition with 2-mercaptobenzothiazole (2-MBT) on zinc in an aqueous solution of sodium chloride and a borate buffer solution of pH 7.4 are studied. Individually, V15/41 is capable of spontaneously passivating the zinc electrode and ennobling the local depassivation potential in a borate buffer solution with the addition of 0.01 mol/l sodium chloride. In the absence of preliminary cathodic reduction of zinc at Cinh = 4.0…6.0 mmol/l V15/41, water-soluble complex compounds of the dicarboxylate anion with surface metal cations are formed. In the case of using the composition V15/41 with 2-MBT (9:1), the protective effect also increases with an increase in its concentration. The highest passivation properties are possessed by V15/41 +2-MBT (9:1), which at 2.0 mmol/l has a protective effect of 0.10 V. The thicknesses of the forming protective layers of V15/41 and its composition from the inhibited solution were determined using the ellipsometric method. From the results of corrosion tests it follows that V15/41 at Cinh = 1 mmol/l provides a zinc protection degree Z = 44%, and with an increase in Cinh V15/41 the protection degree decreases. The combined use of V15/41 with 2-MBT (9:1) at Cinh = 4 mmol/l provides complete zinc protection against corrosion destruction for 7 days.

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