Oxygen Permeability through Internal Oxidation Zone in Fe-Cr Alloys under Dry and Humid Conditions at 973 and 1 073 K

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  • Setiawan Asep Ridwan
    Graduate Student, Tokyo Institute of Technology
  • Hanafi Bin Ani Mohd
    Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology
  • Ueda Mitsutoshi
    Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology
  • Kawamura Kenichi
    Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology
  • Maruyama Toshio
    Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology

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Abstract

Internal oxidation of Fe–Cr alloys were investigated in dry and humid atmospheres at temperatures of 973 and 1073 K in order to clarify the effect of humidity on the oxygen permeability in internal oxidation zone. The oxygen partial pressure in the chamber was fixed by Fe/FeO powder mixture. The calculated oxygen permeability increases linearly with increasing Cr concentration in the alloys, both at 973 and 1073 K. Moreover, the presence of humidity enhanced the oxygen permeability compared with that under dry condition. The oxygen permeability through IOZ in humid atmosphere is larger than that in dry atmosphere as a factor of 1.2.

Journal

  • ISIJ International

    ISIJ International 50 (2), 259-263, 2010

    The Iron and Steel Institute of Japan

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