Korean Journal of Metals and Materials (대한금속재료학회지)

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

Effect of Microstructure on Corrosion Characteristics of Zr-5Nb Alloy

Zr-5Nb 합금의 부식특성에 미치는 미세조직 영향

  • Kim, Hyun-Gil (Fusion Technology Division, Korea Atomic Energy Reserch Institute) ;
  • Choi, Byoung-Kwon (Fusion Technology Division, Korea Atomic Energy Reserch Institute) ;
  • Cho, Hai-Dong (Nuclear Materials Research Division, Korea Atomic Energy Reserch Institute) ;
  • Park, Jeong-Yong (Fusion Technology Division, Korea Atomic Energy Reserch Institute) ;
  • Jeong, Yong-Hwan (Fusion Technology Division, Korea Atomic Energy Reserch Institute)
  • 김현길 (한국원자력연구원 원자력융합기술개발부) ;
  • 최병권 (한국원자력연구원 원자력융합기술개발부) ;
  • 조해동 (한국원자력연구원 원자력재료연구부) ;
  • 박정용 (한국원자력연구원 원자력융합기술개발부) ;
  • 정용환 (한국원자력연구원 원자력융합기술개발부)
  • Received : 2008.06.23
  • Published : 2008.08.25
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Abstract

For a better understanding of the correlation between a corrosion and a microstructure, it is necessary to study a phase transformation with an annealing condition for Zr-Nb alloy. Zr-5wt.%Nb alloy with different phase characteristics was prepared with various annealing conditions. A microstructural study and corrosion test were performed to investigate the effect of a phase such as the phase type, fraction, and size on corrosion. The corrosion behavior of the Zr-5Nb alloy was very sensitive to the annealing condition, which affected the formation of the ${\beta}$-phases (${\beta}$-Nb or ${\beta}$. The corrosion rate of the Zr-5Nb alloy annealed at $500^{\circ}C$ with the formation of the ${\beta}$-Nb phase was lower than that of the Zr-5Nb alloy annealed from 600 to $800^{\circ}C$ with the formation of the ${\beta}$-Zr phase. The highest corrosion rate was observed for the ${\beta}$-quenched Zr-5Nb alloy. After a consideration of the corrosion rate and micro structure of the Zr-5Nb alloy, the corrosion resistance of that alloy was improved due to the formation of a small sized ${\beta}$-Nb phase which could be controlled by the annealing condition.

Keywords

Acknowledgement

Supported by : 교과부

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