High-Temperature Corrosion of Weldment of Fe-2%Mn-0.5%Si Steel in N2/H2O/H2S-Mixed Gas

Fe-2%Mn-0.5%Si-0.2C steel was welded and corroded
at 600, 700 and 800oC for 20 h in 1 atm of N2/H2S/H2O-mixed gas in
order to characterize the high-temperature corrosion behavior of the
welded joint. Corrosion proceeded fast and almost linearly. It
increased with an increase in the corrosion temperature. H2S formed
FeS owing to sulfur released from H2S. The scales were fragile and
nonadherent.

Authors:

• Sang Hwan Bak
• Min Jung Kim
• Dong Bok Lee

Keywords:

• Fe-Mn-Si Steel
• Corrosion
• Welding
• Sulfidation
• H2S Gas.

References:

[1] G. Y. LEE, and D. H. Bae, “Assessment of the sulfide corrosion fatigue
strength for a multi-pass welded A106 Gr B steel pipe below the low
SSCC limit,” Journal of Mechanical Science and Technology, vol. 23, pp.
3191-3198, 2009.
[2] D. J. Young, High Temperature Oxidation and Corrosion of Metals,
Elsevier, USA, 2008, p. 455.
[3] S. Mrowec, and K. Przybylski, “Transport properties of sulfide scales and
sulfidation of metals and alloys,” Oxidation Metals, vol. 23, pp. 107-139,
1985.
[4] M. Schulte, A. Rahmel, and M. Schütze, “The sulfidation behavior of
several commercial ferritic and austenitic steels,” Oxidation Metals, vol.
49, pp. 33-70, 1998.
[5] P. Kofstad, “Defects and transport properties of metal oxides,” Oxidation
Metals, vol. 44, pp. 3-27, 1995.