Abstract
Composite coatings were obtained by electrochemical codeposition of V2O5 nanoparticles with zinc, from an additive free acid sulfate bath. The corrosion behavior of electrodeposited Zn and Zn-V2O5 composite coatings was investigated in 3.5% NaCl solution using polarization and electrochemical impedance spectroscopy (EIS). The decrease in I corr values and an increase in R ct values show the higher corrosion resistant nature of Zn-V2O5 coatings. The observed textural modifications of composite coatings are associated with the specific structural modification of Zn crystallites provoked by the adsorption-desorption phenomena occurring on the metal surface, induced by the presence of V2O5 nanoparticles. It has been observed that the presence of V2O5 nanoparticles favors the [1 0 2] and [1 1 2] texture of zinc matrix. Moreover, the codeposition of V2O5 nanoparticles with zinc was found to be favored at pH 3.5 and applied current density 4 A dm−2. A considerable grain refinement of the deposit occurred due to incorporation of V2O5 nanoparticles and hence improved the preferred orientation of the zinc crystallites.
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The authors are grateful to University Grant Commission and Department of Science and Technology, New Delhi, India for providing instrumental facilities. The authors wish to thank Kuvempu University, Shankaragatta, India for providing laboratory facilities to carry out this work.
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Bindiya, S., Basavanna, S. & Arthoba Naik, Y. Electrodeposition and Corrosion Properties of Zn-V2O5 Composite Coatings. J. of Materi Eng and Perform 21, 1879–1884 (2012). https://doi.org/10.1007/s11665-011-0099-6
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DOI: https://doi.org/10.1007/s11665-011-0099-6