Engineering and Technology

Smart coating with dual-pH sensitive, inhibitor-loaded nanofibers for corrosion protection

C. Li, X. Guo, et al.

Discover how innovative smart coatings created by Chao Li, Xiaolei Guo, and Gerald S Frankel offer on-demand corrosion protection using advanced inhibitor-loaded nanofibers. These remarkable nanofibers not only enhance corrosion resistance but also adaptively release corrosion inhibitors when needed, ensuring lasting protection even under duress.

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Abstract

This study explores smart coatings for on-demand corrosion protection using inhibitor-loaded nanofibers created via coaxial electrospinning. These nanofibers exhibit a core-shell structure with Ce(NO₃)₃ and a chitosan/polyacrylic acid polyelectrolyte coacervate as the core and shell, respectively. UV-vis spectroscopy confirms their pH sensitivity, releasing Ce(NO₃)₃ at both low and high pH, mimicking conditions at corrosion anodes and cathodes. A coating system integrating these nanofibers into a polyvinyl butyral matrix enhances corrosion protection of AA2024-T3. Even with artificial damage, the nanofibers persistently release Ce(NO₃)₃, inhibiting corrosion.

Publisher

npj Materials Degradation

Published On

Nov 04, 2021

Authors

Chao Li, Xiaolei Guo, Gerald S Frankel

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