Processes of adaptation and protective characteristics growth in multilayer polymer coatings modified with carbon nanotubes
https://doi.org/10.61852/2949-3412-2025-3-4-61-79
Abstract
The electrochemical (EC) properties of multilayer adaptive coatings (AC) modified with carbon nanotubes (CNT) have been studied. Within the framework of the theory of “reduced” geometric states, a methodological approach is formulated to compare the characteristics of the echoes of multilayer coatings of different thicknesses. The influence of AC modification by CNT has been studied. It is shown that CNTs have a significant effect on the EC characteristics. For the coatings under consideration, a positive value of the potential of the substrate under the coating with CNT is found. Moreover, with increasing exposure time, further refinement of both Pt and St3 protected substrates is observed. It is shown that the impedance kinetics of multilayer AC on different substrates can be described within the framework of a combination of known equivalent schemes (ES) (Voit, Mansfeld, Mansfeld−Voit), corresponding to models of defectfree coating, coatings with through pores and coatings with internal defects. It is shown that during exposure in an aggressive environment, the evolution of the coating/substrate ES system is observed. The nature of the evolution of the ES of the same coating is different on different metal substrates. It has been established that there is no obvious correlation of the potential of substrates (corroding St3 and inert Pt) with the corrosion potentials of the corresponding metals and with their corrosion resistance at an exposure of 3% NaCl. It is suggested that in the case of AC, the potential of the substrate is formed not only by the anodic process on the substrate, but also by EC processes of oxidation and structuring in the polymer base of the AC under the influence of the medium.
About the Authors
V. A. Golovin
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospect, 119071 Moscow
S. A. Dobriyan
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospect, 119071 Moscow
V. A. Shchelkov
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospect, 119071 Moscow
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Review
For citations:
Golovin V.A., Dobriyan S.A., Shchelkov V.A. Processes of adaptation and protective characteristics growth in multilayer polymer coatings modified with carbon nanotubes. Title in english. 2025;(4):61-79. (In Russ.) https://doi.org/10.61852/2949-3412-2025-3-4-61-79
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