Corrosion of Fe-2%Mn-0.5%Si Steels at 600-800℃ in N2/H2O/H2S atmospheres
- Corrosion of Fe-2%Mn-0.5%Si Steels at 600-800℃ in N2/H2O/H2S atmospheres
- 김민정; 박상환; 이동복
- Fe-Mn alloys; Corrosion; H2S
- Issue Date
- VOL 44, NO 5, 201-206
- Fe-2%Mn-0.5%Si alloys were corroded at 600, 700 and 800℃ for up to 70 h in 1 atm of N2 gas, or 1 atm
of N2/H2O-mixed gases, or 1 atm of N2/H2O/H2S-mixed gases. Oxidation prevailed in N2 and N2/H2O gases,
whereas sulfidation dominated in N2/H2O/H2S gases. The oxidation/sulfidation rates increased in the order of
N2 gas, N2/H2O gases, and, much more seriously, N2/H2O/H2S gases. The base element of Fe oxidized to Fe2O3
and Fe3O4 in N2 and N2/H2O gases, whereas it sulfidized to FeS in N2/H2O/H2S gases. The oxides or sulfides
of Mn or Si were not detected from the XRD analyses, owing to their small amount or dissolution in FeS.
Since FeS was present throughout the whole scale, the alloys were nonprotective in N2/H2O/H2S gases.
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