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

Abstract

Highlights: ► New sol–gel routes to replace chromates for corrosion protection of aluminum. ► Effect of cerium concentration on the microstructure of xerogel. ► Electrochemical and mechanical performances of hybrid coating with different cerium contents. ► Good correlation between the different results with an optimal cerium content of 0.01 M. -- 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 glycidoxypropyl-trimethoxysilane (GPTMS) and aluminum tri-sec-butoxide Al(O{sup s}Bu){sub 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.

Authors:
 [1]; ; ; ;  [1]; ; ;  [2]
  1. Institut Carnot CIRIMAT, Université de Toulouse, UMR CNRS 5085, 118 Route de Narbonne, 31062 Toulouse Cedex 9 (France)
  2. Departamento Fısico-Química, Instituto de Química, Universidade Estadual Paulista, UNESP, CP 355, 14801-970 Araraquara, SP (Brazil)
Publication Date:
OSTI Identifier:
22215549
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; ALUMINIUM ALLOYS; CERIUM; CORROSION PROTECTION; CORROSION RESISTANCE; DEPOSITS; MECHANICAL PROPERTIES; MICROSTRUCTURE; NUCLEAR MAGNETIC RESONANCE; SPECTROSCOPY

Citation Formats

Cambon, Jean-Baptiste, E-mail: cambon@chimie.ups-tlse.fr, Esteban, Julien, Ansart, Florence, Bonino, Jean-Pierre, Turq, Viviane, Santagneli, S.H., Santilli, C.V., and Pulcinelli, S.H. Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.08.034.
Cambon, Jean-Baptiste, E-mail: cambon@chimie.ups-tlse.fr, Esteban, Julien, Ansart, Florence, Bonino, Jean-Pierre, Turq, Viviane, Santagneli, S.H., Santilli, C.V., & Pulcinelli, S.H. Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior. United States. doi:10.1016/J.MATERRESBULL.2012.08.034.
Cambon, Jean-Baptiste, E-mail: cambon@chimie.ups-tlse.fr, Esteban, Julien, Ansart, Florence, Bonino, Jean-Pierre, Turq, Viviane, Santagneli, S.H., Santilli, C.V., and Pulcinelli, S.H. Thu . "Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior". United States. doi:10.1016/J.MATERRESBULL.2012.08.034.
@article{osti_22215549,
title = {Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior},
author = {Cambon, Jean-Baptiste, E-mail: cambon@chimie.ups-tlse.fr and Esteban, Julien and Ansart, Florence and Bonino, Jean-Pierre and Turq, Viviane and Santagneli, S.H. and Santilli, C.V. and Pulcinelli, S.H.},
abstractNote = {Highlights: ► New sol–gel routes to replace chromates for corrosion protection of aluminum. ► Effect of cerium concentration on the microstructure of xerogel. ► Electrochemical and mechanical performances of hybrid coating with different cerium contents. ► Good correlation between the different results with an optimal cerium content of 0.01 M. -- 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 glycidoxypropyl-trimethoxysilane (GPTMS) and aluminum tri-sec-butoxide Al(O{sup s}Bu){sub 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.},
doi = {10.1016/J.MATERRESBULL.2012.08.034},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}