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The Study on the Corrosion Property of the Zn-Mg Alloy Coatings with Various Mg Contents using EIS Measurement
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 Title & Authors
The Study on the Corrosion Property of the Zn-Mg Alloy Coatings with Various Mg Contents using EIS Measurement
Bae, Ki-Tae; La, Joung-Hyun; Kim, Kwang-Bae; Lee, Sang-Yul;
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 Abstract
In this study, the Zn-Mg alloy coatings with various Mg contents were deposited using an unbalanced magnetron sputtering process. Their surface microstructure, chemical composition, phase, and corrosion property were investigated. The microstructure of the Zn-Mg coatings changed from porous microstructure to dense one with increasing Mg contents in the coatings. As Mg contents in coatings increased, intermetallic phases such as and were detected from X-ray diffraction (XRD) results. The corrosion resistance of the Zn-Mg alloy coatings was investigated quantitatively using electrochemical impedance spectroscopy (EIS) measurement with 3.5% NaCl solution. The results of EIS measurement showed that the charge transfer resistance and the phase angle of the Zn-Mg alloy coatings were increased from to and from about to with increasing Mg contents from 5.1 wt.% to 15.5 wt.% in the coatings. These results demonstrate that the Zn-Mg coatings with increasing Mg contents showed an enhanced corrosion resistance.
 Keywords
Zn-Mg coating;electrochemical impedance spectroscopy (EIS);corrosion resistance;
 Language
Korean
 Cited by
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