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The effects of curing temperature on bilayer and monolayer hybrid films: mechanical and electrochemical properties

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Abstract

Thermal curing contributes to the formation and performance of hybrid films (HFs), because it enhances barrier properties by reticular densification, which originates from a less porous layer, and improves corrosion protection and mechanical properties. Increasing the number of deposited layers further enhances these properties. In this work, a HF formed by an alkoxide precursor solution of 3-(trimethoxysilylpropyl) methacrylate and tetraethoxysilane with cerium nitrate and polyethylene glycol was applied to the galvanized steel. The films were obtained by either monolayer or bilayer dip coating, and they were cured at different temperatures (60 and 90 °C) for 20 min. The results indicate that both the temperature and the number of layers interfere on the ability of HFs to act as effective barriers against corrosion. The bilayer system cured at 60 °C showed the best electrochemical impedance results; however, the monolayer HF cured at 90 °C presented higher wear resistance.

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Acknowledgments

The authors would like to thank CAPES (the Brazilian Government Agency for the Development of Human Resources) and CNPq (the Brazilian National Council for Scientific and Technological Development) for the financial support.

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Authors and Affiliations

  1. LAPEC, Federal University of Rio Grande do Sul – UFRGS, Avenida Bento Gonçalves, Porto Alegre, RS, 9500, Brazil

    S. R. Kunst, H. R. P. Cardoso, M. R. Ortega V, L. V. R. Beltrami & C. F. Malfatti

  2. LACOR, Federal University of Rio Grande do Sul – UFRGS, Avenida Bento Gonçalves, Porto Alegre, RS, 9500, Brazil

    T. L. Menezes

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  1. S. R. Kunst
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  2. H. R. P. Cardoso
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Correspondence to S. R. Kunst.

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Kunst, S.R., Cardoso, H.R.P., Ortega V, M.R. et al. The effects of curing temperature on bilayer and monolayer hybrid films: mechanical and electrochemical properties. J Appl Electrochem 44, 759–771 (2014). https://doi.org/10.1007/s10800-014-0697-8

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  • DOI: https://doi.org/10.1007/s10800-014-0697-8

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