Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Highly Pressurized Hydrogen Gas on Tensile Properties of a Low-Alloy Steel Used for Manufacturing CNG Storage Vessels

CNG 저장용기용 저합금강의 인장 특성에 미치는 고압 수소가스의 영향

  • Lee, H.M. (Center for Materials Measurement, Korea Research Institute of Standards and Science) ;
  • Jeong, I.H. (Center for Materials Measurement, Korea Research Institute of Standards and Science) ;
  • Park, J.S. (Center for Materials Measurement, Korea Research Institute of Standards and Science) ;
  • Nahm, S.H. (Center for Materials Measurement, Korea Research Institute of Standards and Science) ;
  • Han, J.O. (R&D Division, Korea Gas Corporation) ;
  • Lee, Y.C. (R&D Division, Korea Gas Corporation)
  • 이해무 (한국표준과학연구원 재료측정표준센터) ;
  • 정인현 (한국표준과학연구원 재료측정표준센터) ;
  • 박종서 (한국표준과학연구원 재료측정표준센터) ;
  • 남승훈 (한국표준과학연구원 재료측정표준센터) ;
  • 한정옥 (한국가스공사 연구개발원) ;
  • 이영철 (한국가스공사 연구개발원)
  • Received : 2010.12.24
  • Accepted : 2012.05.21
  • Published : 2012.08.01
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Abstract

SNG (synthetic natural gas or substitute natural gas) could contribute greatly toward energy security. In addition, HCNG (or $H_2CNG$) is expected to be used as a fuel gas for internal combustion engines and home appliances because it has extremely low emissions and high thermal efficiency. However, the hydrogen contained in SNG or HCNG can deteriorate the mechanical properties of the materials used in existing natural gas infrastructure. Therefore, it is necessary to investigate the effect of hydrogen on the mechanical properties of such materials so that SNG or HCNG can be transported and distributed safely and reliably. In this study, the effect of highly pressurized hydrogen gas on the tensile properties of a low-alloy steel used for manufacturing CNG storage vessels was investigated using the so-called hollow tensile specimen technique.

대체천연가스(SNG)는 에너지 안보 차원에서 에너지 수급 안정화 방안의 하나로 많은 관심을 받고 있다. 또한 HCNG (또는 $H_2CNG$)는 배기가스 내의 유해 성분을 현저히 줄이고 열효율도 높일 수 있어서 내연기관이나 가정용 연료로 사용될 것으로 기대되고 있다. 그러나 SNG나 HCNG에 포함되어 있는 수소는 재료에 침투하여 그 재료의 역학적 특성을 크게 저하시키는 것으로 알려져 있다. 따라서 SNG나 HCNG를 안전하고 효율적으로 수송 공급하려면 이를 위해 운용되는 인프라의 안전성과 신뢰성 확보가 선결되어야 한다. 본 연구에서는 중공 시험편을 이용한 인장시험법을 통하여 CNG 저장용기용 저합금강이 나타내는 고압 수소 분위기에서의 인장 특성 변화에 대하여 조사하였다.

Keywords

References

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