Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Corrosion of Fe-9%Cr-1%Mo Steel at 600 and 700℃ in N2/(0.5, 2.5)%H2S-mixed Gas

  • Lee, Dong Bok (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Abro, Muhammad Ali (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Yadav, Poonam (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Bak, Sang Hwan (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Shi, Yuke (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Kim, Min Jung (School of Advanced Materials Science and Engineering, Sungkyunkwan University)
  • Received : 2016.03.29
  • Accepted : 2016.04.12
  • Published : 2016.04.30
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Abstract

The T91 steel (Fe-9%Cr-1%Mo) was corroded at 600 and $700^{\circ}C$ for 5 - 70 h in the $N_2$/(0.5, 2.5)%$H_2$Smixed gas at one atm. It was corroded fast, forming the outer FeS layer and the inner (FeS, $FeCr_2O_4$)-mixed layer. The formation of the outer FeS layer facilitated the oxidation of Cr to $FeCr_2O_4$ in the inner layer. Since the nonprotective FeS scale was present over the whole scale, T91 steel displayed poor corrosion resistance.

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References

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