Development of high performance electroless Ni-P-HNT composite coatings

Ranganatha, S and Venkatesha, TV and Vathsala, K (2012) Development of high performance electroless Ni-P-HNT composite coatings. In: APPLIED SURFACE SCIENCE, 263 . pp. 149-156.

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Abstract

Halloysite nanotubes (HNTs) of the dimension 50nm x 1-3 mu m (diameter x length) are utililized to fabricate the alloy composite by employing electroless/autocatalytic deposition technique. Electroless Ni-P-HNT binary alloy composite coatings are prepared successfully on low carbon steel. These nanotubes were made to get inserted/incorporated into nickel matrix and corresponding composites are examined for their electrochemical, mechanical and tribological performances and compared with that of plain Ni-P. The coatings were characterized using scanning electron microscopy (SEM) and Energy dispersive X-ray analysis (EDX) techniques to analyze surface nature and composition correspondingly. Small amount of incorporated HNTs made Ni-P deposits appreciable enhancement and betterment in corrosion resistance, hardness and friction resistance. This drastic improvement in the properties reflects the effect of addition of HNTs into Ni-P matrix leading to the development of high performance Ni-P-HNT composite coatings. (C) 2012 Elsevier B. V. All rights reserved.

Item Type:	Journal Article
Publication:	APPLIED SURFACE SCIENCE
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copyright for this article belongs to ELSEVIER SCIENCE BV, NETHERLANDS
Keywords:	Electroless Ni-P;Halloysite nanotubes;Composite coating;Corrosion;Microhardness;Friction
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	02 Jan 2013 11:21
Last Modified:	02 Jan 2013 11:21
URI:	http://eprints.iisc.ac.in/id/eprint/45572

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