Influence of glycerol on plasma electrolytic oxidation coatings evolution and on corrosion behaviour of coated AM50 magnesium alloy

Jangde, Ashutosh and Kumar, S and Blawert, C (2019) Influence of glycerol on plasma electrolytic oxidation coatings evolution and on corrosion behaviour of coated AM50 magnesium alloy. In: CORROSION SCIENCE, 157 . pp. 220-246.

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Abstract

PEO coatings were obtained from base silicate electrolyte (bPEO) and glycerol added silicate electrolytes (gPEO) for different processing times. PEO coatings' evolution and their corrosion behavior were systematically studied as a function of PEO processing time. Smaller maximum pore size and higher pore density have been discerned for gPEO compared to bPEO for all the PEO processing time. Glycerol addition resulted in reduced coating thickness, promoted periclase, MgO, formation and suppressed forsterite, Mg2SiO4, amorphization. From electrochemical impedance spectroscopy study, it was found that gPEO had better corrosion resistance as compared to bPEO.

Item Type:	Journal Article
Publication:	CORROSION SCIENCE
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	copyright for this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords:	Magnesium alloy; Plasma electrolytic oxidation; Glycerol additive; Electrochemical impedance spectroscopy; Corrosion; Early localized micro-discharge
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Sep 2019 09:49
Last Modified:	19 Sep 2019 09:49
URI:	http://eprints.iisc.ac.in/id/eprint/63513

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