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Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior

Cambon, Jean-Baptiste and Esteban, Julien and Ansart, Florence and Bonino, Jean-Pierre and Turq, Viviane and Santagneli, Silvia Helena and Santilli, Celso Valentin and Pulcinelli, Sandra Helena Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior. (2012) Materials Research Bulletin, 47 (11). 3170-3176. ISSN 0025-5408

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Official URL: http://dx.doi.org/10.1016/j.materresbull.2012.08.034

Abstract

An organic–inorganic hybrid coating was developed to improve the corrosion resistance of the aluminum alloy AA 2024-T3. Organic and inorganic coatings derived from glycidoxypropyltrimethoxysilane (GPTMS) and aluminum tri-sec-butoxide Al(OsBu)3, with different cerium contents, were deposited onto aluminum by dip-coating process. Corrosion resistance and mechanical properties were investigated by electrochemical impedance measurements and nano-indentation respectively. An optimal cerium concentration of 0.01 M was evidenced. To correlate and explain the hybrid coating performances in relation to the cerium content, NMR experiments were performed. It has been shown that when the cerium concentration in the hybrid is higher than 0.01 M there are important modifications in the hybrid structure that account for the mechanical properties and anti-corrosion behavior of the sol–gel coating.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at www.sciencedirect.com/science/article/pii/S0025540812006058
HAL Id:hal-00837994
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 - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP / São Paulo State University (BRAZIL)
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Deposited By: cirimat webmestre
Deposited On:24 Jun 2013 13:33

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