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Process and properties of electroless Ni-Cu-P-ZrO2 nanocomposite coatings

Ranganatha, S and Venkatesha, TV and Vathsala, K (2012) Process and properties of electroless Ni-Cu-P-ZrO2 nanocomposite coatings. In: Materials Research Bulletin, 47 (3). pp. 635-645.

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Official URL: http://dx.doi.org/10.1016/j.materresbull.2011.12.0...

Abstract

Electroless Ni-Cu-P-ZRO(2) composite coating was successfully obtained on low carbon steel matrix by electroless plating technique. Coatings with different compositions were obtained by varying copper as ternary metal and nano sized zirconium oxide particles so as to obtain elevated corrosion resistant Ni-P coating. Microstructure, crystal structure and composition of deposits were analyzed by SEM, EDX and XRD techniques. The corrosion behavior of the deposits was studied by anodic polarization, Tafel plots and electrochemical impedance spectroscopy (EIS) in 3.5% sodium chloride solution. The ZRO(2) incorporated Ni-P coating showed higher corrosion resistance than plain Ni-P. The introduction of copper metal into Ni-P-ZRO(2) enhanced the protection ability against corrosion. The influence of copper metal and nanoparticles on microhardness of coatings was evaluated. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Alloys;Composites;Impedance spectroscopy;Electrochemical properties;Mechanical properties
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 12 May 2012 10:24
Last Modified: 12 May 2012 10:24
URI: http://eprints.iisc.ernet.in/id/eprint/44396

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