Corrosion behaviour of microarc-oxidised magnesium alloy in Earle’s balanced salt solution
作者： Junqing Zhang , Lei Zhang , Benjamin M. Wilke , Weiping Li , Chengyun Ning
关键词: Magnesium 、 Coating 、 Materials science 、 Metallurgy 、 Simulated body fluid 、 Dielectric spectroscopy 、 Corrosion 、 Scanning electron microscope 、 Magnesium alloy 、 Surface modification
摘要: Microarc oxidation (MAO) coating is effective in improving the corrosion resistance of magnesium (Mg) alloys a simulated body fluid. MAO coatings were deposited on AZ31 alloy at different pulse frequencies. Samples immersed Earle’s balanced salt solution (EBSS) up to 21 d. Scanning electron microscopy, potentiodynamic polarisation testing, electrochemical impedance spectroscopy and X-ray diffraction (XRD) performed evaluate behaviour EBSS compared that uncoated AZ31. MAO-coated samples demonstrated improved bare throughout period, indicating exhibited good protection EBSS. Given same immersion time, showed decreased current density increased with increasing frequency. The produced 3000 Hz best ones 300...
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