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Article Dans Une Revue Journal of Materials Chemistry Année : 2011

Self-healing protective coatings with "green" chitosan based pre-layer reservoir of corrosion inhibitor

M.L. Zheludkevich
  • Fonction : Auteur
J. Tedim
  • Fonction : Auteur
C.S.R. Freire
  • Fonction : Auteur
Susana C.M. Fernandes
S. Kallip
  • Fonction : Auteur
A. Lisenkov
  • Fonction : Auteur
A. Gandini
  • Fonction : Auteur
M.G.S. Ferreira
  • Fonction : Auteur

Résumé

A new type of corrosion protective self-healing coating is reported in the present study. The coating is constituted by a chitosan-based pre-layer deposited onto the metal surface and a barrier hybrid film. The chitosan film doped with cerium ions serves as a reservoir for the corrosion inhibitor. The cerium ions form a complex with the functional groups of chitosan macromolecules providing a prolonged release of the active agent on demand. The developed bi-layer protective coating was applied to aluminium alloy 2024, which is widely used in the aeronautical industry. The results obtained from electrochemical impedance spectroscopy clearly demonstrate a superior corrosion protection when the coating with the cerium-doped biopolymer pre-layer is used. The localized electrochemical study in micro-confined defects showed a well-defined self-healing ability of the developed coating system. © The Royal Society of Chemistry 2011.

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hal-01600487 , version 1 (02-10-2017)

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M.L. Zheludkevich, J. Tedim, C.S.R. Freire, Susana C.M. Fernandes, S. Kallip, et al.. Self-healing protective coatings with "green" chitosan based pre-layer reservoir of corrosion inhibitor. Journal of Materials Chemistry, 2011, 21 (13), pp.4805-4812. ⟨10.1039/c1jm10304k⟩. ⟨hal-01600487⟩
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