Corrosion inhibition of magnesium alloy AZ31 in chloride-containing solutions by aqueous permanganate
Maria A. Osipenko, Aliaksandr A. Kasach, Janusz Adamiec, Małgorzata Zimowska, И. И. Курило, Dzmitry S. Kharytonau
Abstract
Abstract In this work, corrosion of the AZ31 magnesium alloy was examined in 0.05 M NaCl solutions containing 0.01–0.150 mol/dm 3 of potassium permanganate as a corrosion inhibitor. A set of electrochemical impedance spectroscopy, linear sweep voltammetry, and hydrogen evolution measurements revealed high inhibitor effectiveness at relatively high (0.150 mol/dm 3 ) KMnO 4 concentrations. Based on data of energy-dispersive X-ray analysis, scanning electron microscopy, and Raman spectroscopy, a mechanism of the corrosion inhibition of AZ31 alloy by potassium permanganate in chloride-containing media was proposed.
Topics & Concepts
Potassium permanganateCorrosionDielectric spectroscopyMagnesium alloyLinear sweep voltammetryMagnesiumCorrosion inhibitorPermanganateAlloyMaterials scienceScanning electron microscopeCyclic voltammetryChlorideInorganic chemistryAqueous solutionElectrochemistryRaman spectroscopyNuclear chemistryChemistryMetallurgyComposite materialOrganic chemistryPhysicsOpticsElectrodePhysical chemistryMagnesium Alloys: Properties and ApplicationsCorrosion Behavior and InhibitionHydrogen Storage and Materials