Metallurgical and Materials Transactions A

, Volume 44, Issue 2, pp 1114–1122 | Cite as

Electrochemical Impedance Spectroscopy and Corrosion Behavior of Co/CeO2 Nanocomposite Coatings in Simulating Body Fluid Solution

Article
First Online:

Abstract

A series of Co/CeO2 (25 nm) nanocomposite coating materials by electrodeposition were successfully prepared containing different cerium oxide composition in the cobalt-plating bath. Stainless steel (304L) was used as support material for nanocomposite coatings. The nano-CeO2 is uniformly incorporated into cobalt matrix, and the effect on surface morphologies was identified by scanning electron microscopy with energy-dispersive X-ray analysis. Codeposition of nano-CeO2 particles with cobalt disturbs the regular surface morphology of the cobalt coatings. It should be noted that the as-prepared Co/CeO2 nanocomposite coatings were found to be much superior in corrosion resistance over those of pure cobalt coatings materials based on a series of electrochemical impedance spectroscopy measurements in simulating body fluid solution. With increase in the nano-CeO2 particles concentration in the cobalt electrolyte, it is observed that the corrosion resistance of Co/CeO2 increases. Co/CeO2 nanocomposite coatings have higher polarization resistance as compared with pure cobalt layers in simulating body fluid solution.

Keywords

CeO2 Electrochemical Impedance Spectroscopy Composite Coating Polarization Resistance Cerium Oxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

The authors gratefully acknowledge the International Cooperation Project Bilateral Romania (UDJG) France (ECP) Programme Humbert Curien (PHC) Brancusi titled Etude de Dépôts Composites Nanostructurées pour Surfaces Fonctionnelles (19603 PC – ANCS 114/4-04-2010).

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2012

Authors and Affiliations

  1. 1.Research (Competences) Centre Interfaces Tribocorrosion and Electrochemical Systems (CC-ITES), Materials Science and EnvironmentDunarea de Jos University of GalatiGalatiRomania

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