Effect of impurity sulfur on the stability of Cr oxides formed on both austenitic and ferritic steels in a high-temperature steam-atmosphere

Masaaki Nakai, Yoshinori Murata, Masahiko Morinaga, Ryokichi Hashizume, Yoshiatsu Sawaragi

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

Microalloying effects of sulfur are investigated systematically on the steam oxidation resistance of austenitic steels and ferritic steels. It is found that the presence of S, about 50ppm, in the steels improves remarkably the steam oxidation resistance of both austenitic steels and high Cr ferritic steels. This result indicates that ferritic steels with excellent steam oxidation resistance can be designed and developed by just leaving S at an impurity level in them without detriment to the mechanical strength. However, the S effect is not so remarkable in low Cr ferritic steels as in high Cr ferritic steels. This fact implies that the S effect is related strongly to the stability of Cr2O3 in high temperature steam conditions.

Original languageEnglish
Pages (from-to)1029-1034
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number2
DOIs
Publication statusPublished - 2003 Jan 1
Externally publishedYes
EventThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain
Duration: 2003 Jul 72003 Jul 11

Keywords

  • Austenitic Steel
  • CrO
  • Evaporation
  • Ferritic Steel
  • Impurity Effect
  • Steam Oxidation
  • Sulfur

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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