Proceedings of the Korean Institute of Surface Engineering Conference (한국표면공학회:학술대회논문집)

The Korean Institute of Surface Engineering (한국표면공학회)
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Corrosion Prevention of Cr steels in $SO_2$ Atmosphere for Electrial Power Plants

화력발전소의 장수명화를 위한 Cr 강(鋼)의 고온 $SO_2$가스 부식저감 대책 기술

  • 이동복 (성균관대학교 신소재공학과) ;
  • 최정호 (성균관대학교 신소재공학과)
  • Published : 2007.04.05
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Abstract

The corrosion characteristics of Cr steels were investigated to protect Cr steels from the SO2-gas corrosion in the coal-fired power plant. The samples tested were low alloy ferritic steel (ASTM T22, 23), martensitic steel (ASTM T91, 92, 122), and austenitic stainless steel (ASTM 347HFG). The corrosion tests were performed between 600oC and 1000oC in Ar + (0.2, 1)%SO2 gas for 100 hr. Chromium was quite beneficial to corrosion resistance, while iron was not. The corrosion resistance increased in the order of T22, T23, T91, T92, T122, and 347HFG.

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