Title: Effect of accelerators and stabilisers on crystallinity of binary and ternary electroless nickel alloys

Authors: Aljohani Talal, Almarshad Abdullah, Al-Mayouf Abdullah

Addresses: Corrosion Research Group, King Abdulaziz City for Science and Technology, P.O. Box 6068, Riyadh ‐ 11442, Saudi Arabia. ' Corrosion Research Group, King Abdulaziz City for Science and Technology, P.O. Box 6068, Riyadh ‐ 11442, Saudi Arabia. ' Chemistry Department, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

Abstract: Autocatalytic binary and ternary Ni-P, Ni-W-P alloys films were prepared using alkaline citrate-based baths. The effect of succinic acid and thiourea on the formation characteristics was investigated. The addition of these additives caused a change in phosphorus and tungsten contents of the deposits. The coating thicknesses were determined by using scanning electron microscope and the compositions were measured using an energy dispersive X-ray spectroscopy (EDX). XRD results revealed that the addition of succinic acid and thiourea to Ni-P alloy decrease the crystal size from nanocrystalline to amorphous and vice versa with Ni-W-P alloy.

Keywords: electroless Ni-P; Ni-W-P; nanocrystalline; corrosion resistance; accelerators; stabilisers; crystallinity; electroless nickel alloys; succinic acid; thiourea; nanomaterials; phosphorus; tungsten; coating thickness.

DOI: 10.1504/IJNBM.2009.027696

International Journal of Nano and Biomaterials, 2009 Vol.2 No.1/2/3/4/5, pp.42 - 51

Published online: 08 Aug 2009 *

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