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Molecules 2018, 23(5), 1135;

Innovative Formulation Combining Al, Zr and Si Precursors to Obtain Anticorrosion Hybrid Sol-Gel Coating

CIRIMAT, Université de Toulouse, CNRS INPT UPS, UMR 5085, 118 Route de Narbonne, 31062 Toulouse CEDEX 09, France
Amphenol Socapex, 948 Promenade de l’Arve–BP 29, 74300 Thyez, France
Author to whom correspondence should be addressed.
Academic Editors: Ahmad Mehdi and Sébastien Clément
Received: 25 April 2018 / Revised: 4 May 2018 / Accepted: 6 May 2018 / Published: 10 May 2018
(This article belongs to the Special Issue Sol-Gel Chemistry. From Molecule to Functional Materials)
View Full-Text   |   Download PDF [3595 KB, uploaded 10 May 2018]   |  


The aim of our study is to improve the aluminium alloy corrosion resistance with Organic-Inorganic Hybrid (OIH) sol-gel coating. Coatings are obtained from unusual formulation with precursors mixing: glycidoxypropyltrimethoxysilane (GPTMS), zirconium (IV) propoxide (TPOZ) and aluminium tri-sec-butoxide (ASB). This formulation was characterized and compared with sol formulations GPTMS/TPOZ and GPTMS/ASB. In each formulation, a corrosion inhibitor, cerium (III) nitrate hexahydrate, is employed to improve the corrosion performance. Coatings obtained from sol based on GPTMS/TPOZ/ASB have good anti-corrosion performances with Natural Salt Spray (NSS) resistance of 500 h for a thickness lower than 4 µm. Contact angle measurement showed a coating hydrophobic behaviour. To understand these performances, nuclear magnetic resonance (NMR) analyses were performed, results make sol-gel coating condensation evident and are in very good agreement with previous results. View Full-Text
Keywords: aluminium alloy 6061; sol-gel process; hybrid coating; corrosion resistance aluminium alloy 6061; sol-gel process; hybrid coating; corrosion resistance

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Genet, C.; Menu, M.-J.; Gavard, O.; Ansart, F.; Gressier, M.; Montpellaz, R. Innovative Formulation Combining Al, Zr and Si Precursors to Obtain Anticorrosion Hybrid Sol-Gel Coating. Molecules 2018, 23, 1135.

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