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Copper-graphene oxide composite coatings for corrosion protection of mild steel in 3.5% NaCl

Raghupathy, Y and Kamboj, Anshul and Rekha, M Y and Rao, Narasimha N P and Srivastava, Chandan (2017) Copper-graphene oxide composite coatings for corrosion protection of mild steel in 3.5% NaCl. In: THIN SOLID FILMS, 636 . pp. 107-115.

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Official URL: http://doi.org/10.1016/j.tsf.2017.05.042

Abstract

This paper investigates the effect of graphene oxide (GO) on morphology, microstructure and corrosion behaviour of Cu-GO composite coatings. Cu-GO composite coatings were electrodeposited on mild steel substrate by dispersing chemically synthesised GO into a Cu electrolytic bath. Anionic surfactant (sodium lauryl sulphate) was used to obtain uniform and compact coating morphology. Incorporation of GO into Cu matrix produced a finer granular coating morphology with a strong < 220 > preferred orientation. The analysis of electrochemcial corrosion test results revealed that steels coated with Cu-GO were invariably more corrosion resistant compared to both bare steel and pure Cu coated steel. Extent of the reduction in the corrosion rate increased with increasing amount of GO in electrodeposited Cu matrix. Improved corrosion resistance of Cu-GO coatings was related to < 220 > texture and high impermeability of GO to Cu+ ions and dissolved O-2 in the chloride media. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 16 Sep 2017 06:21
Last Modified: 16 Sep 2017 06:21
URI: http://eprints.iisc.ac.in/id/eprint/57802

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