Self-healing protective coatings with "green" chitosan based pre-layer reservoir of corrosion inhibitor
| authors | Zheludkevich, ML; Tedim, J; Freire, CSR; Fernandes, SCM; Kallip, S; Lisenkov, A; Gandini, A; Ferreira, MGS |
| nationality | International |
| journal | JOURNAL OF MATERIALS CHEMISTRY |
| keywords | NANOCONTAINERS; NETWORKS; POLYMER; CHITIN; CERIUM |
| abstract | 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. |
| publisher | ROYAL SOC CHEMISTRY |
| issn | 0959-9428 |
| year published | 2011 |
| volume | 21 |
| issue | 13 |
| beginning page | 4805 |
| ending page | 4812 |
| digital object identifier (doi) | 10.1039/c1jm10304k |
| web of science category | Chemistry, Physical; Materials Science, Multidisciplinary |
| subject category | Chemistry; Materials Science |
| unique article identifier | WOS:000288450200012 |
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