Journal of Coatings Technology and Research

, Volume 12, Issue 1, pp 1–35 | Cite as

Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: a review of recent progress

  • R. B. FigueiraEmail author
  • C. J. R. Silva
  • E. V. Pereira
Review Paper


This paper is a review of the most recent and relevant achievements (from 2001 to 2013) on the development of organic–inorganic hybrid (OIH) coatings produced by sol–gel-derived methods to improve resistance to oxidation/corrosion of different metallic substrates and their alloys. This review is focused on the research of OIH coatings based on siloxanes using the sol–gel process conducted at an academic level and aims to summarize the materials developed and identify perspectives for further research. The fundamentals of sol–gel are described, including OIH classification, the interaction with the substrate, their advantages, and limitations. The main precursors used in the synthesis of OIH sol–gel coatings for corrosion protection are also discussed, according to the metallic substrate used. Finally, a multilayer system to improve the resistance to corrosion is proposed, based on OIH coatings produced by the sol–gel process, and the future research challenges are debated.


Coatings Organic–inorganic hybrids Corrosion Sol–gel method 



Aliphatic epoxy acrylate


Aluminum tri-sec-butoxide






Chemical conversion coatings




Poly(bisphenol A-co-epichlorohydrin)




Epoxidized castor oil




Epoxy resin






Hot-dip galvanized steel




Hexamethylene diisocyanate




2,2′-Bis(4-β-hydroxy ethoxy) phenyl propane








Isophorone diisocyanate


Linseed diol fattyamide




3-Methacryloxy propyl triethoxysilane




n-Propyl trimethoxysilane


Organic–inorganic hybrid








Bis[(ureapropyl)triethoxysilane]bis(propyl)-terminated-polydimethylsiloxane 1000






Polyester resin


Silica nanoparticles


Self-assembled nanophase particle




Toluene diisocyanate














Zirconium(IV) butoxide



The authors would like to gratefully acknowledge the financial support from Fundação para a Ciência e Tecnologia (FCT) for the PhD grant SFRH/BD/62601/2009, the financial support by Centro de Química [project F-COMP-01-01024-FEDER-022716 (ref. Pest-C/Qui/UI0686/2011)-FEDER-COMPETE] and EU COST action MP1202: HINT - Rational design of hybrid organic-inorganic interfaces: the next step towards functional materials.


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Copyright information

© American Coatings Association 2014

Authors and Affiliations

  • R. B. Figueira
    • 1
    • 2
    Email author
  • C. J. R. Silva
    • 2
  • E. V. Pereira
    • 1
  1. 1.Laboratório Nacional de Engenharia Civil (LNEC)LisbonPortugal
  2. 2.Centro de QuímicaUniversidade do MinhoBragaPortugal

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