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Characterization of NiBP-graphite composite coatings deposited by dynamic chemical plating

Hamid Omidvar (Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.)
Mohammad Sajjadnejad (Young Researchers and Elite Club, Islamic Azad University, Borujerd, Iran.)
Guy Stremsdoerfer (Tribological & Dynamical Systems Laboratory, Ecole Centrale of Lyon, Lyon, France.)
Yunny Meas (Parque Tecnologico Queretaro, Centro de Investigacion y Desarrollo Tecnologico en Electroquımica (CIDETEQ), Querétaro, Mexico.)
Ali Mozafari (Young Researchers and Elite Club, Islamic Azad University, Borujerd, Iran.)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 2 March 2015

Abstract

Purpose

This paper aims to coat ternary composite NiBP-graphite films by Dynamic Chemical Plating “DCP” technique with a growth rate of at least 5 μm/h, which makes this technique a worthy candidate for production of composite films. Electroless nickel plating method can be used to deposit nickel–phosphorous and nickel–boron coatings on metals or plastic surface. However, restrictions such as toxicity, short lifetime of the plating-bath and limited plating rate have limited applications of conventional electroless processes.

Design/methodology/approach

DCP is an alternative for producing metallic deposits on non-conductive materials and can be considered as a modified electroless coating process. Using a double-nozzle gun, two different solutions containing the precursors are sprayed simultaneously and separately onto the surface. With this technique, NiBP-graphite films are fabricated and their corrosion and tribological properties are investigated.

Findings

With a film thickness of 2 μm, tribological analysis confirms that these coatings have favorable anti-friction and anti-wear properties. Corrosion resistance of NiBP-graphite composite films was investigated, and it was found that graphite incorporation significantly enhances corrosion resistance of NiBP films.

Originality/value

DCP is faster and simpler to perform compared to other electroless deposition techniques. Using a double-nozzle gun, metal salt solution and reducing agents are sprayed to the surface, forming a deposit. Previously, coatings such as Cu, Cu-graphite, Cu-PTFE, Ni-B-TiO2, Ni-P, Ni-B-P and Ni-B-Zn with favorable compactness and adherence by DCP were reported. In this paper, the authors report the application of the DCP technique for depositing NiBP-PTFE nanocomposite films.

Keywords

Citation

Omidvar, H., Sajjadnejad, M., Stremsdoerfer, G., Meas, Y. and Mozafari, A. (2015), "Characterization of NiBP-graphite composite coatings deposited by dynamic chemical plating", Anti-Corrosion Methods and Materials, Vol. 62 No. 2, pp. 116-122. https://doi.org/10.1108/ACMM-11-2013-1320

Publisher

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Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited