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Electrochemical behavior of Zn-graphene composite coatings

Kumar, Punith MK and Singh, Mahander Pratap and Srivastava, Chandan (2015) Electrochemical behavior of Zn-graphene composite coatings. In: RSC ADVANCES, 5 (32). pp. 25603-25608.

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Official URL: http://dx.doi.org/10.1039/c5ra02898a

Abstract

A Zn-graphene composite coating was electrodeposited on mild steel. The graphene was synthesized by electrochemical exfoliation of graphite. Electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction techniques were used to characterize the coatings. Compared to a pure Zn coating, the Zn-graphene coating exhibited reduced grain size, reduced surface defects, hillock structures over the coating surface and an altered texture. The corrosion behavior of the coatings was examined by Tafel polarization and electrochemical impedance spectroscopic methods. A significant improvement in the corrosion resistance in terms of reduction in corrosion current and corrosion rate and increase in polarization resistance was noted in the case of the Zn coating containing graphene.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Keywords: CORROSION BEHAVIOR; ELECTRODEPOSITED ZN; EXFOLIATION; GRAPHITE; LAYER; SUPERCAPACITORS; ENHANCEMENT; FABRICATION; RESISTANCE; ADDITIVES
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 24 Apr 2015 06:19
Last Modified: 30 Sep 2015 06:58
URI: http://eprints.iisc.ac.in/id/eprint/51406

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