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Anticorrosive cerium-based coatings prepared by the sol–gel method

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Abstract

The development of efficient anti-corrosion and environmentally friendly coating systems are needed for the replacement of the highly toxic Cr-based conversion coatings for corrosion protection of aluminum alloys. In this study, we demonstrate that the direct application of ceramic cerium-based sol–gel coatings to AA7075-T6 substrates produces high-performance anti-corrosion layers. Electrochemical experiments and analyses of the microstructure demonstrate that the protective layers are very efficient for the passivation of the alloy surfaces operating as both passive and active barrier for corrosion protection.

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Acknowledgments

The authors wish to thank the Brazilian Funding Institution FAPESP (Proc.: 06/50692–2, 05/04641–4 and 2004/12189–1) for the scholarships and financial support.

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Authors and Affiliations

  1. Instituto de Química de São Carlos, Universidade de São Paulo, C.P. 780, São Carlos, SP, 13560-970, Brazil

    Giancarlo R. Salazar-Banda, Sandra R. Moraes, Artur J. Motheo & Sergio A. S. Machado

  2. Instituto de Tecnologia e Pesquisa (ITP), Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Aracaju, SE, Brazil

    Giancarlo R. Salazar-Banda

Authors
  1. Giancarlo R. Salazar-Banda
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  2. Sandra R. Moraes
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  3. Artur J. Motheo
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  4. Sergio A. S. Machado
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Corresponding author

Correspondence to Giancarlo R. Salazar-Banda.

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Salazar-Banda, G.R., Moraes, S.R., Motheo, A.J. et al. Anticorrosive cerium-based coatings prepared by the sol–gel method. J Sol-Gel Sci Technol 52, 415–423 (2009). https://doi.org/10.1007/s10971-009-2031-1

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  • DOI: https://doi.org/10.1007/s10971-009-2031-1

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