열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제29권4호
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  • Pages.168-175
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  • 2016
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지
DOI QR코드

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용체화처리된 Mg-4%Zn 합금의 부식 저항성에 미치는 미량 Ca 첨가의 영향

Effect of Trace Amount of Ca on Corrosion Resistance of Solutionized Mg-4%Zn Alloy

  • 전중환 (한국생산기술연구원 뿌리산업기술연구소 융합공정신소재그룹) ;
  • 황인제 (한국생산기술연구원 뿌리산업기술연구소 융합공정신소재그룹)
  • Jun, Joong-Hwan (Advanced Process and Materials R&D Group, Korea Institute of Industrial Technology) ;
  • Hwang, In-Je (Advanced Process and Materials R&D Group, Korea Institute of Industrial Technology)
  • 투고 : 2016.05.06
  • 심사 : 2016.05.19
  • 발행 : 2016.07.30
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초록

Influence of trace amount of Ca addition on the corrosion resistance was comparatively investigated in solutionized Mg-4%Zn and Mg-4%Zn-0.1%Ca alloys. In as-cast state, the alloys were characterized by primary ${\alpha}-(Mg)$ dendrite with MgZn intermetallic compound particles. After solution-treatment, both alloys consisted of single ${\alpha}-(Mg)$ phase by dissolution of the compound particles into the matrix. It was found from the immersion and electrochemical corrosion tests that the Mg-4%Zn alloy had better corrosion resistance than the Mg-4%Zn-0.1%Ca alloy. Morphological and compositional analyses on the surface corrosion products indicate that the incorporation of Ca oxide with low PBR value into the surface corrosion products would be responsible for the decreased corrosion resistance of the Ca-containing alloy.

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