Corrosion-Resistant Hydrophobic Nanostructured Ni-Reduced Graphene Oxide Composite Coating with Improved Mechanical Properties

Journal Article · Thu Nov 15 04:00:00 EST 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3706-Y· OSTI ID:22863166

Panigrahi, A.; Singh, S. K.; Pradhan, S. K. ^[1]

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1. CSIR - Institute of Minerals and Materials Technology, Advanced Materials Technology Department (India)

In the present work, corrosion-resistant and hydrophobic nickel-reduced graphene oxide (Ni-RGO) composite coating prepared by electroless deposition technique on mild steel (MS), without the use of toxic chemicals, is reported. The field emission scanning electron microscopy micrographs show a uniform composite coating of Ni-RGO with smaller grain size, whereas cuboidal and larger grains were observed in the case of Ni coating on MS. A reduction in crystallite size from 30 to 13 nm with the incorporation of RGO to the Ni matrix was estimated from XRD. The corrosion activity was investigated with potentiodynamic polarization and electrochemical impedance spectroscopy measurements. The surface of Ni-RGO composite coating remained intact, almost undamaged and showed a robust resistance to corrosion with an inhibition efficiency of about 95% in aggressive 3.5 wt.% NaCl solution. Nanoindentation test revealed that the hardness and Young’s modulus of Ni-RGO composite coating are increased by about 25 and 19%, respectively, as compared to Ni coating.

• OSTI ID: 22863166
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 11 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
COATINGS
CORROSION
CORROSION RESISTANCE
DEPOSITION
ELECTROCHEMISTRY
FIELD EMISSION
GRAIN SIZE
GRAPHENE
HARDNESS
IMPEDANCE
NANOSTRUCTURES
NICKEL
POLARIZATION
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
STEELS
SURFACES
X-RAY DIFFRACTION