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Molecules 2018, 23(5), 1079; https://doi.org/10.3390/molecules23051079

Improvement of Adhesion Properties and Corrosion Resistance of Sol-Gel Coating on Zinc

1
VM Building Solutions, Les Mercuriales, Tour du Ponant, 40 rue Jean Jaurès, 93170 Bagnolet, France
2
CIRIMAT, Université de Toulouse, CNRS INPT UPS, UMR 5085, 118 Route de Narbonne, 31062 Toulouse CEDEX 09, France
*
Author to whom correspondence should be addressed.
Academic Editors: Ahmad Mehdi and Sébastien Clément
Received: 3 April 2018 / Revised: 26 April 2018 / Accepted: 28 April 2018 / Published: 3 May 2018
(This article belongs to the Special Issue Sol-Gel Chemistry. From Molecule to Functional Materials)
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Abstract

Corrosion is a major problem for durability of many metals and alloys. Among the efficient classical surface treatments, chromate-based treatments must be banished from industrial use due to their toxicity. At the same time, sol-gel routes have demonstrated high potential to develop an efficient barrier effect against aggressive environments. By this process, the anti-corrosion property can be also associated to others in the case of the development of multi-functional hybrid coatings. In this paper, the main goal is precisely to improve both the corrosion resistance and the adhesion properties of phosphated zinc substrates by the deposition of a hybrid (organic-inorganic) sol-gel layer. To reach this double objective, a choice between two formulations 3-glycidoxypropyltrimethoxysilane (GPTMS)/aluminum-tri-sec-butoxide (ASB) and 3-(trimethoxysilyl)propylmethacrylate (MAP)/tetraethylorthosilicate (TEOS) was firstly made based on the results obtained by microstructural characterizations using SEM, optical analysis, and mechanical characterization such as shock and/or scratch tests (coupled to climatic chamber and salt spray exposure). Several investigations were performed in this study, and the best formulation and performances of the system were obtained by adding a new precursor (1-[3-(trimethoxysilyl)propyl]ureido-UPS) under controlled conditions, as detailed in this paper. View Full-Text
Keywords: sol-gel; hybrid materials; corrosion; adhesion; coating; zinc sol-gel; hybrid materials; corrosion; adhesion; coating; zinc
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Savignac, P.; Menu, M.-J.; Gressier, M.; Denat, B.; Khadir, Y.E.; Manov, S.; Ansart, F. Improvement of Adhesion Properties and Corrosion Resistance of Sol-Gel Coating on Zinc. Molecules 2018, 23, 1079.

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