Microstructure-corrosion property correlation in electrodeposited AlCrFeCoNiCu high entropy alloys-graphene oxide composite coatings

Aliyu, Ahmed and Srivastava, Chandan (2019) Microstructure-corrosion property correlation in electrodeposited AlCrFeCoNiCu high entropy alloys-graphene oxide composite coatings. In: THIN SOLID FILMS, 686 .

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Abstract

AlCrFeCoNiCu high entropy alloys (HEA) composite coating with and without graphene oxide (GO) were electrodeposited over mild steel substrate. Potentiodynamic polarization and electrochemical impedance spectroscopy tests performed in 3.5 wt% NaCl aqueous solution showed that the corrosion resistance of the HEA-GO composite coatings was higher than the HEA coating without GO. The corrosion resistance gradually increased with increase in the GO amount in the coating. Detailed microstructural characterization performed using transmission electron microscopy technique revealed that addition of GO facilitated microstructural and compositional homogeneity which eliminated localized corrosive attack due to elemental segregation induced galvanic coupling thereby increasing the corrosion resistance for the HEA-GO composite coatings.

Item Type:	Journal Article
Publication:	THIN SOLID FILMS
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	copyright for this article belongs to ELSEVIER SCIENCE SA
Keywords:	High entropy alloys; Graphene oxide; Coating; Corrosion; Microstructure
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Sep 2019 06:10
Last Modified:	19 Sep 2019 06:10
URI:	http://eprints.iisc.ac.in/id/eprint/63508

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