Effect of PEO Process Conditions on Oxidized Surface Properties of Mg alloy, AZ31 and AZ91. I. Applied Voltage and Time

PEO 처리조건에 따른 마그네슘 합금 AZ31과 AZ91의 산화표면피막특성에 대한 연구. I. 전압과 시간의 영향

Ham, Jae-Ho;Jeon, Min-Seok;Kim, Yong-Nam;Shin, Min Chul;Kim, Kwang Youp;Kim, Bae-Yeon

  • Received : 2016.03.10
  • Accepted : 2016.03.16
  • Published : 2016.04.01


The surface of Mg alloy, AZ31 and AZ91, were treated by PEO (plasma electrolytic oxidation) in Na-P system electrolyte, with different applied voltage and time. Thickness, roughness and X-ray crystallographic analysis revealed several results. The more applied time and voltage of PEO treated, the thicker oxidized surface coating layer were covered. And surface roughness increased with the thickness of oxidized layer. It was thought that when oxide layer grew, resistivity and breakdown voltage increased with the thickness of layer, and then, the energy of micro plasma need to be higher then before. So, it made craters and pores of surface become greater, which were responsible for the coarse surface.


PEO;Oxidization;Mg alloy;Crystal structure;Electric properties


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Supported by : 인천대학교