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Direct-to-metal UV-cured hybrid coating for the corrosion protection of aircraft aluminium alloy

Ni, Lingli and Chemtob, Abraham and Croutxé-Barghorn, Céline and Moreau, Nadia and Bouder, Thierry and Chanfreau, Sébastien and Pébère, Nadine Direct-to-metal UV-cured hybrid coating for the corrosion protection of aircraft aluminium alloy. (2014) Corrosion Science, 89. 242-249. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2014.09.006


Finding eco-efficient and environmentally viable alternatives to chromate coatings represents a fundamental milestone in the aerospace industry. Here, we show a chromate-free approach to protective hybrid coatings on aluminium alloy (AA2024-T3) departing from photoinduced sol–gel and cationic polymerizations. Beginning with a film of n-alkyltrimethoxysilane and diepoxy monomer, we rely on photogenerated superacids to induce the single step formation of two inorganic and organic barrier networks. Such system combines the unique aspects of photopolymerization including fast reactions, temporal control, solvent-free composition and temperature independence. Used without chemical conversion coating or anodizing, some films have passed 2000h of salt spray testing.

Item Type:Article
HAL Id:hal-02490561
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > SOCOMORE (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Laboratory name:
Agence Nationale de la Recherche - ANR
Deposited On:25 Feb 2020 10:52

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