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Journal of Sol-Gel Science and Technology

, Volume 52, Issue 3, pp 415–423 | Cite as

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

  • Giancarlo R. Salazar-Banda
  • Sandra R. Moraes
  • Artur J. Motheo
  • Sergio A. S. Machado
Original Paper

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.

Keywords

Sol–gel growth Active protection Passive protection Self-healing AA7075-T6 X-ray photoelectron spectroscopy (XPS) 

Notes

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.

Supplementary material

10971_2009_2031_MOESM1_ESM.doc (1.2 mb)
Supplementary material 1 (DOC 1,264 kb)

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Giancarlo R. Salazar-Banda
    • 1
    • 2
  • Sandra R. Moraes
    • 1
  • Artur J. Motheo
    • 1
  • Sergio A. S. Machado
    • 1
  1. 1.Instituto de Química de São CarlosUniversidade de São PauloSão CarlosBrazil
  2. 2.Instituto de Tecnologia e Pesquisa (ITP), Programa de Pós-Graduação em Engenharia de ProcessosUniversidade TiradentesAracajuBrazil

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