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Título

Corrosion product layers on magnesium alloys AZ31 and AZ61: Surface chemistry and protective ability

AutorFeliú Jr., S.; Llorente, Irene
Palabras claveXPS
SEM
EIS
Magnesium
Passive films
Fecha de publicación2015
EditorElsevier
CitaciónApplied Surface Science 347: 736-746 (2015)
ResumenThis paper studies the chemical composition of the corrosion product layers formed on magnesium alloys AZ31 and AZ61 following immersion in 0.6M NaCl, with a view to better understanding their protective action. Relative differences in the chemical nature of the layers were quantified by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive analysis of X-ray (EDX) and low-angle X-ray diffraction (XRD). Corrosion behavior was investigated by Electrochemical Impedance Spectroscopy (EIS) and hydrogen evolution measurement. An inhibitive effect from the corrosion product layers was observed from EIS, principally in the case of AZ31, as confirmed by hydrogen evolution tests. A link was found between carbonate enrichment observed by XPS in the surface of the corrosion product layer, concomitant with the increase in the protective properties observed by EIS.
URIhttp://hdl.handle.net/10261/136887
DOI10.1016/j.apsusc.2015.04.189
Identificadoresdoi: 10.1016/j.apsusc.2015.04.189
issn: 0169-4332
Aparece en las colecciones: (CENIM) Artículos
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