Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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High-Temperature Corrosion of T92 Steel in N2/H2O/H2S-Mixed Gas

  • Shi, Yuke (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Kim, Min Jung (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Park, Soon Yong (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Abro, M. Ali (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Yadav, Poonam (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Lee, Dong Bok (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
  • Received : 2016.05.31
  • Accepted : 2016.06.23
  • Published : 2016.06.30
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Abstract

The ASTM T92 steel was corroded at $600^{\circ}C$ and $800^{\circ}C$ at 1 atm of $N_2/3.1%H_2O/2.42%H_2S-mixed$ gas. The formed scales were thick and fragile. They consisted primarily of the outer FeS scale and the inner (FeS, $FeCr_2S_4$)-mixed scale containing a small amount of the $Cr_2O_3$ scale. This indicated that corrosion occurred mainly via sulfidation rather than oxidation due to the $H_2S$ gas. Since FeS was present throughout the whole scale, T92 steel was non-protective, displaying high corrosion rates.

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References

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