Journal
APPLIED SURFACE SCIENCE
Volume 434, Issue -, Pages 326-335Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.09.232
Keywords
magnesium alloy; Plasma electrolytic oxidation; Corrosion resistance; Structural characteristics; Evolution mechanism
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Funding
- National Natural Science Foundation of China [51171167]
- Hebei Province Natural Science Foundation of China [2015203348, B2015203406]
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Evolution processes of the corrosion behavior and structural characteristics of the plasma electrolytic oxidation (PEO) coated AZ31 magnesium alloy were investigated by using scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), potentio-dynamic polarization curves and electrochemical impedance spectroscopy (EIS) measurements. Detached coating samples were fabricated by an electrochemical method and more details of the internal micro-structure of coatings were clearly observed on the fractured cross-section morphologies of the samples compared to general polished cross-section morphologies. Evolution mechanisms of the coating corrosion behavior in relation to the evolution of micro-structural characteristics were discussed in detail. (C) 2017 Published by Elsevier B.V.
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