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Film growth and alloy enrichment during anodizing AZ31 magnesium alloy in fluoride/glycerol electrolytes of a range of water contents
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SYSNO ASEP 0472822 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Film growth and alloy enrichment during anodizing AZ31 magnesium alloy in fluoride/glycerol electrolytes of a range of water contents Author(s) Němcová, A. (GB)
Galal, O. (GB)
Skeldon, P. (GB)
Kuběna, Ivo (UFM-A) RID, ORCID
Šmíd, Miroslav (UFM-A) RID, ORCID
Briand, E. (FR)
Vickridge, I. (FR)
Ganem, J.-J. (FR)
Habazaki, H. (JP)Number of authors 9 Source Title Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 219, NOV (2016), s. 28-37Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords magnesium ; anodic film ; enrichment Subject RIV JK - Corrosion ; Surface Treatment of Materials Institutional support UFM-A - RVO:68081723 UT WOS 000386656700004 EID SCOPUS 84988951236 DOI 10.1016/j.electacta.2016.09.089 Annotation The effect of anodizing AZ31 magnesium alloy in a fluoride/glycerol electrolyte containing from 1 to 40 vol.% water on the compositions of the anodic film and the underlying alloy has been investigated. A range of constant current densities and water contents of the electrolyte were employed. Scanning and transmission electron microscopy, with energy-dispersive X-ray spectroscopy, X-ray diffraction and ion beam analyses were used to analyse the anodized alloy. Barrier films, containing fluoride and oxide species, were formed above the matrix, at high current efficiency; a porous film was formed above Al-Mn intermetallic particles. The current density and the water content of the electrolyte affected the O:F atomic ratio and the ionic transport in the films. Significant enrichments of zinc and aluminium were generated in a thin layer of the matrix immediately beneath the film under all conditions of anodizing, with the enrichment of zinc reaching 6.2 x 10(15) at cm(-2) in the enriched alloy layer. The cause of the enrichments and the consequences to film growth are discussed. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2017
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