Hot Corrosion Behavior of JIS SS400 and JIS SUS304 steels in BaO<sub>2</sub>-BaO

DOI Web Site 11 References
  • Honma Akira
    Department of Materials Science and Engineering, Graduate School of Engineering and Resource Science, Akita University
  • Sato Yoshiyuki
    Department of Materials Science and Engineering, Graduate School of Engineering and Resource Science, Akita University
  • Hara Motoi
    Department of Materials Science and Engineering, Graduate School of Engineering and Resource Science, Akita University

Bibliographic Information

Other Title
  • BaO<sub>2</sub>-BaO中におけるSS400およびSUS304鋼の高温腐食挙動
  • BaO₂-BaO中におけるSS400およびSUS304鋼の高温腐食挙動
  • BaO ₂-BaO チュウ ニ オケル SS400 オヨビ SUS304コウ ノ コウオン フショク キョドウ
  • Hot Corrosion Behavior of JIS SS400 and JIS SUS304 steels in BaO2-BaO

Search this article

Description

The hot corrosion behavior of JIS SS400 and JIS SUS304 steels in BaO2 salt has been examined by measuring the corrosion mass loss, observing the corrosion morphology and analyzing corrosion product. Because solid BaO2 melts at 723 K and the molten BaO2 dissociates into oxygen gas and solid BaO in the temperature region higher than 1073 K, particular attention was given to the change in the corrosion behavior with such an environmental change. In the molten BaO2 at a temperature lower than 973 K, the SS400 steel formed an oxide scale consisting of FeO and Fe3O4 as the inner scale. In the same environment, on the other hand, the SUS304 steel formed a thick scale mainly consisting of BaFe2O4. In the molten BaO2, the SUS304 steel showed a maximum corrosion mass loss at 773 K. The corrosion mass loss for SUS304 steel at this temperature was about 9 times as large as that for the SS400 steel. In the solid BaO in the temperature range higher than 1073 K, the corrosion rate for the SS400 steel remarkably increased with an increase in the temperature. In this case, the SS400 steel formed an inner scale consisting of FeO and Fe3O4, and an outer scale consisting of BaO and BaFe2O4. On the other hand, the corrosion rate for the SUS304 steel in the same environment was far lower than that for the SS400 steel. In this case, the SUS304 steel formed a thin scale which contained an inner scale consisting of Cr2O3･FeO.

Journal

  • Corrosion Engineering

    Corrosion Engineering 61 (11), 443-449, 2012

    Japan Society of Corrosion Engineering

References(11)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top