한국재료학회지 (Korean Journal of Materials Research)

  • 제17권12호
  • /
  • Pages.648-653
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  • 2007
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지
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플라즈마 전해 산화처리한 시효경화 Mg-Al 합금 피막의 기계적 및 전기화학적 특성

Mechanical and Electrochemical Properties of Plasma Electrolytic Oxide Coatings on Aged Mg-Al alloy

  • 장시영 (한국항공대학교 항공재료공학과) ;
  • 김예림 (한국항공대학교 대학원) ;
  • 김양도 (부산대학교 신소재공학부)
  • Chang, Si-Young (Department of Materials Engineering, Korea Aerospace University) ;
  • Kim, Ye-Lim (Graduate Student, Korea Aerospace University) ;
  • Kim, Yang-Do (School of Materials Science and Engineering, Pusan National University)
  • 발행 : 2007.12.31
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초록

Plasma electrolytic oxidation (PEO) treatment was performed on cast Mg-6 wt%Al alloy solution-treated at 693K for 16h and aged at 498K. The surface roughness, thickness, micro-hardness, wear and corrosion properties of coatings on solution-treated and aged Mg-6 wt%Al alloy were investigated. The coatings on aged Mg-6 wt%Al alloy had thinner layer and lower micro-hardness and wear resistance than the solution-treated Mg-6 wt%Al alloy. As the aging time increased, the thickness of coatings decreased while the surface roughness was almost no changed. In addition, the micro-hardness and wear property of coatings decreased with increasing the aging time unlike the uncoated Mg-6 wt%Al alloy showing the peak micro-hardness and the best wear property after aging for 16 h. However, the coatings on Mg-6 wt%Al alloy peak-aged for 16h revealed the best corrosion resistance in 3.5% NaCl solution, which was explained based on the microstructural characteristics.

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