• 제목/요약/키워드: ΔFATT(ΔDBTT)

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전기화학적 분극특성을 이용한 2.25Cr-lMo 강의 열화도 평가 (The Evaluation of 2-25Cr-lMo Steels Degradation by the Electrochemical Polarization Method)

  • 김지수;현양기;이재도;오세규
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2001년도 춘계학술대회 논문집
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    • pp.314-319
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    • 2001
  • Most parts of facilities in domestic petroleum plants and power plants are needed to be abandoned, repaired or replaced, because in Korea they were built in the 1960s and, they have been used under severe conditions and exposed corrosive environments. 2.25Cr- lMo steels have excellent high-temperature mechanical properties. Therefore, the material have been widely used as heat exchanger tubes, boiler headers and its tubes in such industries. But, those microstructural evolutions in high temperature such as precipitation and carbide coarsening give a reason to degrade the material. Especially, in case of this material, carbides induced embrittlement(CIE) is the primary reason for degrading mechanical properties at over 50$0^{\circ}C$. In this paper, we introduce a electrochemical polarization method for detecting CIE quantitatively.

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