The Determination of Negative Voltage during Magnesium Alloy Plasma Process

DOI

10.2991/icmsa-15.2015.174How to use a DOI?

Keywords

Magnesium Alloy, Micro-arc Oxidation, Negative Voltage, Steps Increasing.

Abstract

Plasma process was carried out on ZK60 Mg alloy to explore the effects of different negative voltage on the characteristics of coatings. Surface and cross-section morphologies, coating thickness and corrosion resistance of coatings were investigated by scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), microscope with super-depth of field and electrochemical impedance spectroscopy (EIS). The results reveal that the coating formed under two steps increasing negative voltage mode of 20-25V is superior to that formed under other negative modes. It is of help to develop a compact, smooth, thick MAO coating. The corresponding coating with maximum thickness of about 16.959 m exhibited the best corrosion resistance with high electrochemical impedance of 2.565×1010 ohm.cm2 which is higher than that of substrate about 5 orders of magnitude and low corrosion rate of 0.748 g/m2h.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xi-Zhi Jiang
AU  - Yong-Fu Zhao
PY  - 2014/06
DA  - 2014/06
TI  - The Determination of Negative Voltage during Magnesium Alloy Plasma Process
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 937
EP  - 942
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.174
DO  - 10.2991/icmsa-15.2015.174
ID  - Jiang2014/06
ER  -