Electrodeposition of r-GO/SiC nano-composites on Magnesium and its Corrosion Behavior in Aqueous Electrolyte
authors Kavimani, V; Prakash, KR; Rajesh, R; Rammasamy, D; Selvaraj, NB; Yang, T; Prabakaran, B; Jothi, S
nationality International
journal APPLIED SURFACE SCIENCE
author keywords Reduced graphene oxide; r-GO/SiC nano-composites; Corrosion resistance; Magnesium; Silicon carbide; Electro-deposition
keywords ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; GRAPHENE OXIDE; HYDROGEN EMBRITTLEMENT; MECHANICAL-PROPERTIES; MATRIX COMPOSITES; GRAIN-BOUNDARY; RESISTANCE; COATINGS; ALLOY; NICKEL
abstract In this paper a detailed investigation for corrosion behavior of magnesium substrate electrodeposited differently by nanoparticles like Reduced Graphene Oxide (r-GO synthesized through Modified Hummer's Method), Silicon Carbide (SiC-mechanically alloyed) and also r-GO/SiC nanocomposites (dispersed through ultrasonication process) as coating materials for varying time period was done. Synthesized nanocomposite was characterized through various physio-chemical techniques and confirmation of the same was carried out. Surface morphology of the developed set of specimens was scrutinized through SEM and EDAX which establishes a clean surface coating with minimal defects attainment through electro deposition technique. Electrochemical corrosion behavior for the magnesium substrates coated with r-GO, SiC, r-GO/SiC for 5 and 10 min coating time period was conceded over in 0.1 M of NaCl and Na2SO4 aqueous solution using Tafel polarization and then compared with a pure magnesium substrate. r-GO/SiC nanocomposite coated magnesium substrate showcased a drastic breakthrough in corrosion resistance when compared with other set of specimens in aqueous medium. Delamination behavior for the same set of specimens was carried and the r-GO/SiC nanocomposite coated magnesium exposed a minimum delamination area accounting to the hydrophobic property of graphene and the binding effect of SiC nano particles. (C) 2017 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0169-4332
year published 2017
volume 424
beginning page 63
ending page 71
digital object identifier (doi) 10.1016/j.apsusc.2017.02.082
web of science category Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
subject category Chemistry; Materials Science; Physics
unique article identifier WOS:000410608500011
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journal impact factor 4.439
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