Hybrid organo-ceramic corrosion protection coatings with encapsulated organic corrosion inhibitors
By Li, Lian-Fu; Caenen, Peter; Daerden, Mathieu; Vaes, David; Meers, Guido; Dhondt, Caroline & Celis, Jean-Pierre
Published in Thin Solid Films
NULL
2004
Abstract
To improve corrosion protection properties of sol–gel derived hybrid coatings; two organic corrosion inhibitors (mercaptobenzothiazole and mercaptobenzimidazole) have been encapsulated within the coating matrix in either the presence or absence ofβ-cyclodextrin. Corrosion protection performance of the developed coatings on AA 2024-T3 has been examined by potentiodynamic scan method and scanning vibrating electrode technique. Superior corrosion protection properties have been found for formulations that containβ-cyclodextrin and can be explained by the act of slow release of the inhibitor from the cyclodextrin/inhibitor inclusion complexes and by the self-healing of corrosion defects. The effectiveness of the approach for long-term protection of the high strength aluminum alloys against atmospheric corrosion is discussed.
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