Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지

Effect of Cobalt Contents on the Biocompatibility and Corrosion Properties of Fe-31Cr-27Ni-1.6Mo-1.5W-0.26N Alloy

Fe-31Cr-27Ni-1.6Mo-1.5W-0.26N계 초내식성 스테인리스강의 생체적합성 및 부식특성에 미치는 Co함량의 영향

  • Jang, Soon Geun (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University) ;
  • Yoo, Young Ran (Center for Advanced Life Cycle Engineering, University of Maryland) ;
  • Nam, Hee Soo (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University) ;
  • Shim, Gyu Tae (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University) ;
  • Kim, Jung Gu (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Kim, Young Sik (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University)
  • 장순근 (안동대학교 신소재공학부 청정소재기술연구센터) ;
  • 유영란 ;
  • 남희수 (안동대학교 신소재공학부 청정소재기술연구센터) ;
  • 심규태 (안동대학교 신소재공학부 청정소재기술연구센터) ;
  • 김정구 (성균관대학교 신소재공학부) ;
  • 김영식 (안동대학교 신소재공학부 청정소재기술연구센터)
  • Received : 2008.01.04
  • Published : 2008.04.22
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Abstract

Super austenitic stainless steels shows the high PRE (Pitting Resistance Equivalent) number and the good corrosion resistance. This work controlled the Co contents in Fe-31Cr-1.7Mo-27Ni-0.25N alloys to elucidate the effect of cobalt contents on the biocompatibility and corrosion resistance. Increasing Co contents, the hardness of the annealed alloys tends to be reduced. In aged alloys, cobalt decreased the increments of hardness by aging treatment. Cobalt decreased the critical pitting temperature (CPT) in 6% $FeCl_3$ + 1% HCl solution, but improved the anodic polarization behavior in Hanks' balanced salt solution and artificial saliva solution. Repassivation rate in artificial body solutions was improved by increasing cobalt contents, but didn't show the linear relationship to PRE number of the alloys. The experimental alloys showed the non-cytotoxicity because of its high corrosion resistance.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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