cpomaemКоррозия: защита материалов и методы исследованийTitle in englishИФХЭ РАН10.61852/2949-3412-2023-2-3-95-110cpomaem-68Research ArticleСтатьиСтроение и свойства защитных пленок олеиновой кислоты при контактной и камерной защите металлов. 2. Оксидированный магнийStructure and properties of protective films of oleic acid for contact and chamber protection of metals. 2. Oxidized magnesiumКузнецовИ. А.KuznetsovI. A.

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

Leninsky pr. 31, 119071 Moscow

ГончароваО. А.GoncharovaO. A.

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

Leninsky pr. 31, 119071 Moscow

ЧиркуновА. А.ChirkunovA. A.

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

Leninsky pr. 31, 119071 Moscow

ЛучкинА. Ю.LuchkinA. Yu.

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

Leninsky pr. 31, 119071 Moscow

ЛучкинаВ. А.LuchkinaV. A.

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

Leninsky pr. 31, 119071 Moscow

АндреевН. Н.AndreevN. N.

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

Leninsky pr. 31, 119071 Moscow

n.andreev@mail.ruКузнецовЮ. И.KuznetsovYu. I.

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

Leninsky pr. 31, 119071 Moscow

Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)РоссияA.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of SciencesRussian Federation2024170920240395110Copyright © Кузнецов И.А., Гончарова О.А., Чиркунов А.А., Лучкин А.Ю., Лучкина В.А., Андреев Н.Н., Кузнецов Ю.И., 20242024Кузнецов И.А., Гончарова О.А., Чиркунов А.А., Лучкин А.Ю., Лучкина В.А., Андреев Н.Н., Кузнецов Ю.И.Kuznetsov I.A., Goncharova O.A., Chirkunov A.A., Luchkin A.Y., Luchkina V.A., Andreev N.N., Kuznetsov Y.I.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.cpmrm.ru/jour/article/view/68

Комбинирование конверсионного покрытия с последующим нанесением ингибиторной пленки – эффективный и активно применяемый способ повышения коррозионной стойкости металлоизделий. В данной работе проведено сравнение строения и защитных свойств пленок олеиновой кислоты, формируемых на оксидированной поверхности магния Мг90 из спиртовых растворов и из горячих паров кислоты. Методом эллипсометрии показано, что оба способа приводят к формированию на поверхности тонких, (до 100 нм) слоев, повышающих защитные свойства оксидного покрытия. Максимальный защитный эффект проявила пленка, полученная путем часовой обработки в спиртовом растворе, содержащем 8 мМ кислоты. Вольтамперометрические исследования показали, что такая пленка подавляет анодное растворение. С помощью спектроскопии электрохимического импеданса был определен смешанный блокировочно-активационный механизм защитного действия.

Combining a conversion coating with subsequent application of an inhibitor film is an effective and widely used method for increasing the corrosion resistance of metal products. This work compares the structure and protective properties of oleic acid films formed on the oxidized surface of magnesium Mg90 from alcohol solutions and from hot acid vapors. Using the ellipsometry method, it was shown that both methods lead to the formation of thin (up to 100 nm) layers on the surface, increasing the protective properties of the oxide coating. The maximum protective effect was demonstrated by the film obtained by one-hour treatment in an alcohol solution containing 8 mM acid. Voltammetric studies have shown that such a film suppresses anodic dissolution. Using electrochemical impedance spectroscopy, a mixed blocking-activation mechanism of protective action was determined.

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