한국재료학회지 (Korean Journal of Materials Research)

  • 제32권6호
  • /
  • Pages.301-306
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  • 2022
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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Effect of AZ31 PEO Coating Layer Formation According to Alginic Acid Concentration in Electrolyte Solution

  • Kim, Min Soo (School of Advanced Defense Engineering, College of Interdisciplinary Cooperative Process, Changwon National University) ;
  • Kim, Jong Seop (Department of Materials Convergence and System Engineering, Changwon National University) ;
  • Park, Su Jeong (Department of Materials Convergence and System Engineering, Changwon National University) ;
  • Koo, Bon Heun (School of Materials Science and Engineering, Changwon National University)
  • 투고 : 2022.05.13
  • 심사 : 2022.06.16
  • 발행 : 2022.06.27
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초록

This study explored the possibility of forming a coating layer containing alginic acid on the surface of a magnesium alloy to be used as a biomaterial. We formed a coating layer on the surface of a magnesium alloy using a plasma electrolytic oxidation process in an electrolytic solution with different amounts of alginic acid (0 g/L ~ 8 g/L). The surface morphology of all samples was observed, and craters and nodules typical of the PEO process were formed. The cross-sectional shape of the samples confirmed that the thickness of the coating layer became thicker as the alginic acid concentration increased. It was confirmed that the thickness and hardness of the sample significantly increase with increasing alginic acid concentration. The porosity of the surface and cross section tended to decrease as the alginic acid concentration increased. The XRD patterns of all samples revealed the formation of MgO, Mg2SiO4, and MgF2 complex phases. Polarization tests were conducted in a Stimulate Body Fluid solution similar to the body's plasma. We found that a high amount of alginic acid concentration in the electrolyte improved the degree of corrosion resistance of the coating layer.

키워드

과제정보

This research was supported by Changwon National University in 2021~2022.

참고문헌

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