Cambon, Jean-BaptisteEsteban, JulienAnsart, FlorenceBonino, Jean-PierreTurq, VivianeSantagneli, S. H. [UNESP]Santilli, Celso Valentim [UNESP]Pulcinelli, Sandra Helena [UNESP]2014-05-202014-05-202012-11-01Materials Research Bulletin. Oxford: Pergamon-Elsevier B.V. Ltd, v. 47, n. 11, p. 3170-3176, 2012.0025-5408http://hdl.handle.net/11449/25532An 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((OBu)-Bu-s)(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. (C) 2012 Elsevier Ltd. All rights reserved.3170-3176engHydridesSol-gel chemistryNuclear magnetic resonance (NMR)Impedance spectroscopyElectrochemical propertiesMechanical propertiesArtigo10.1016/j.materresbull.2012.08.034WOS:000311865200017Acesso restrito558429868187086599712025852869670000-0002-8356-8093