Structure and properties of protective films of oleic acid for contact and chamber protection of metals. 2. Oxidized magnesium
https://doi.org/10.61852/2949-3412-2023-2-3-95-110
Abstract
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.
About the Authors
I. A. Kuznetsov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
O. A. Goncharova
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
A. A. Chirkunov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
A. Yu. Luchkin
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
V. A. Luchkina
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
N. N. Andreev
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
Yu. I. Kuznetsov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
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Review
For citations:
Kuznetsov I.A., Goncharova O.A., Chirkunov A.A., Luchkin A.Yu., Luchkina V.A., Andreev N.N., Kuznetsov Yu.I. Structure and properties of protective films of oleic acid for contact and chamber protection of metals. 2. Oxidized magnesium. Title in english. 2024;(3):95-110. (In Russ.) https://doi.org/10.61852/2949-3412-2023-2-3-95-110
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