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Studies on electrodeposition of Zn–MoS2 nanocomposite coatings on mild steel and its properties

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Abstract

Pure zinc and Zn–MoS2 composite coatings were prepared by electrodeposition from zinc sulfate–chloride bath containing uniformly dispersed MoS2 nanoparticles. The effect of MoS2 on the deposition properties morphology, crystallographic orientation, and corrosion behavior were studied. The electrokinetic properties (zeta potential) and size distribution statistics in plating bath for the particles were evaluated using dynamic light scattering experiments. The Zn and Zn–MoS2 deposition process was studied by linear polarization and cyclic voltammetry. Scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction analysis, and potentiodynamic polarization measurements were used to characterize the coatings. The addition of MoS2 to the electrolyte significantly changed the microstructure and crystallographic orientation of the zinc deposits and enhanced the corrosion resistance of the coatings. The morphological and electrochemical properties of the zinc coatings were observed to be significantly affected by the incorporation of MoS2 particles into the zinc matrix.

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Acknowledgments

The authors are grateful to Kuvempu University Shankaraghatta, Karnataka for providing lab facilities. The authors are grateful to the Department of Science and Technology [DST: project sanction no.100/IFD/1924/2008-2009 dated February 07, 2008], New Delhi, Government of India for providing financial assistance.

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Authors and Affiliations

  1. Department of Studies in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta, 577451, Karnataka, India

    Vathsala Kanagalasara & Thimmappa Venkatarangaiah Venkatesha

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  1. Vathsala Kanagalasara
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  2. Thimmappa Venkatarangaiah Venkatesha
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Correspondence to Thimmappa Venkatarangaiah Venkatesha.

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Kanagalasara, V., Venkatesha, T.V. Studies on electrodeposition of Zn–MoS2 nanocomposite coatings on mild steel and its properties. J Solid State Electrochem 16, 993–1001 (2012). https://doi.org/10.1007/s10008-011-1475-8

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  • DOI: https://doi.org/10.1007/s10008-011-1475-8

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