Publication Type
Journal
Journal Name
Materials Characterization
Publication Date
Page Numbers
1 to 8
Volume
online
Abstract
A unique corrosion barrier layer, formed by thermal CO2 treatment with LiNO3 on AZ91D, was characterized to reveal the chemical species and their spatial distribution using the combination of scanning transmission electron microscopy (STEM), energy dispersive spectroscopy (EDS), and electron energy loss spectroscopy (EELS) techniques. Two distinct and spatially segregated phases were identified as Li compound(s) with MgCO3 and MgO in the surface barrier layer. Based on the characterization results, it is presumed that the reaction of Mg oxide/hydroxide with LiNO3 and CO2 occurred preferentially in some local areas where Li compound(s) with MgCO3 were present, but the unreacted areas contained MgO in the surface barrier layer.
