| Effect of Corrosion Inhibitor Pyrovanadate Ions on
Microstructure and Corrosion Resistance of MgAl Layered
Double Hydroxide Films on LA43M Mg-Li Alloy |
Jumei Zhang,a, * Jingwen Wu,a Jiacheng Li,a Chaochao Wang,a Bo Wang,b Duoduo Liana
and Mengchun Zhanga
Pages: 126-133
DOI : 10.1080/0371750X.2024.2349074 |
| Abstract |
| In order to explore the effect of corrosion inhibitor modification on the microstructure
and corrosion resistance of MgAl layered double hydroxide (LDH) film on LA43M
Mg-Li alloy, the MgAl-V2O7
4– LDH films were successfully obtained by ion exchange
method at different hydrothermal temperatures. Microstructure of the MgAl LDH films
with V2O7
4– anion intercalation were characterized by SEM, EDS and XRD, and the
corrosion resistance of the films were tested by EIS, polarization curve and hydrogen
evolution experiments. The results showed that the modified MgAl-V2O7
4– LDH nanosheets
are larger in size, denser and slightly thicker than that of MgAl LDH film.
Electrochemical tests and hydrogen precipitation experiments demonstrated that the
corrosion inhibitor modified MgAl-V2O7
4– LDH films can further enhance the corrosion
resistance of the film. The MgAl-V2O7
4– LDH prepared at 60oC has the most uniform
density and the maximum thickness. It has the lowest Icorr (1.754?10–8 A.cm2) and the
most positive Ecorr (–1.147 V). Furthermore, it showed the best corrosion resistance
in 3.5 wt% NaCl solution.
[Keywords: Mg-Li alloy; V2O7
4– anions; LDH film; Microstructure; Corrosion resistance] |
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