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Morphology and corrosion properties of FeMn-Graphene oxide composite coatings

Aliyu, A and Srivastava, C (2020) Morphology and corrosion properties of FeMn-Graphene oxide composite coatings. In: Journal of Alloys and Compounds, 821 .

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Official URL: https://dx.doi.org/10.1016/j.jallcom.2019.153560


Morphology and corrosion properties of electrodeposited iron manganese-graphene oxide (FeMn-GO) composite coatings was investigated as a function of the GO content. The composite coatings exhibited uniform and compact morphology for lower concentrations of GO in the coating. For higher GO concentrations, agglomeration of GO in the electrolyte bath resulted in non-uniform coating morphology with large surface defects. The influence of GO concentration and coating morphology on the corrosion properties of the coatings was studied by Tafel polarization and electrochemical impedance spectroscopic (EIS) techniques. The impermeability of GO to the corrosive media enhanced the corrosion properties of the composite coatings, with respect to pristine FeMn coating, up to the optimum GO concentration, after which the corrosion resistance behaviour of the composite coatings degraded due to defects and micro-pores present on the surface of the coatings.

Item Type: Journal Article
Publication: Journal of Alloys and Compounds
Publisher: Elsevier
Additional Information: The copyright of this article belongs to Elsevier
Keywords: Binary alloys; Corrosion resistance; Corrosion resistant coatings; Corrosive effects; Electrochemical corrosion; Electrodeposition; Electrodes; Electrolytes; Graphene; Graphene oxide; Iron alloys; Iron oxides; Manganese alloys; Morphology; Surface defects, Coating morphology; Compact morphology; Corrosion property; Electrochemical impedance; Electrodeposited iron; Electrolyte bath; Oxide composites; Tafel polarization, Composite coatings
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 09 Mar 2020 09:03
Last Modified: 09 Mar 2020 09:03
URI: http://eprints.iisc.ac.in/id/eprint/64775

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