Pulse electrodeposition of Cr–SWCNT composite from choline chloride based electrolyte. (October 2014)

• Record Type: Journal Article
• Authors: Maharaja, J.; Raja, M.; Mohan, S.
• Is Part Of: Surface engineering. Volume 30:Number 10(2014)
• Page Start: 722
• Page End: 727
• Publication Date: 2014-10
• Subjects: Carbon nanotubes, -- Composite coating, -- Deep eutectic solvent, -- Pulse electrodeposition; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1179/1743294414Y.0000000324
• Languages: English
• ISSNs: 0267-0844

Abstract

Abstract : Using an environmentally benign choline chloride based deep eutectic solvent (DES), chromium (Cr) and chromium–single walled carbon nanotube (Cr–SWCNT) composite coatings on copper (Cu) substrate were developed by pulse electrodeposition (PED) method. The cyclic voltammetry studies of Cr 3+ choline chloride based DES system showed that the reduction of Cr 3+ to Cr 0 occurs via two-step process. The effect of SWCNTs on the thickness, current efficiency and hardness of the deposits were examined. The SWCNTs improved the hardness and corrosion resistance properties of composite coating. Crystallographic phases, structural morphology, topography and corrosion resistance were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), field emission (FE)-SEM, atomic force microscopy (AFM) and potentiodynamic polarisation techniques respectively. Structural morphological data revealed uniform distribution of SWCNTs in the chromium metal matrix.