Beneficial effect of impurity sulfur on high-temperature steam oxidation of high chromium ferritic steels

Y. Murata, M. Nakai, K. Nagai, M. Morinaga, Y. Sasaki, R. Hashizume

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The effect of S in steels on high-temperature steam oxidation resistance was investigated with respect to the content and the state in high Cr ferritic steels. The beneficial sulfur effect on high-temperature steam oxidation resistance was verified in high Cr ferritic steels. It was considered that Cr was enriched in the vicinity of the segregated S on the specimen surface because of a strong affinity between Cr and S atoms, resulting in the easy formation of the passive Cr2O3 oxide layer on the surface even after the steam oxidation test for a short time. It was found that the precipitated S operated more effectively to the improvement of the steam oxidation resistance compared to the solid-solution state of S in the steels. Furthermore, the sulfur effect on the high temperature steam oxidation resistance was related strongly to the amount of dissolution hydrogen in the high Cr ferritic steels.

Original languageEnglish
Title of host publicationHigh-Temperature Oxidation and Corrosion 2005 - Proceedings of the International Symposium on High-Temperature Oxidation and Corrosion 2005
PublisherTrans Tech Publications Ltd
Pages147-154
Number of pages8
ISBN (Print)9780878494095
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes
EventInternational Symposium on High-Temperature Oxidation and Corrosion, ISHOC-05 - Nara, Japan
Duration: 2005 Nov 302005 Dec 2

Publication series

NameMaterials Science Forum
Volume522-523
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherInternational Symposium on High-Temperature Oxidation and Corrosion, ISHOC-05
CountryJapan
CityNara
Period05/11/3005/12/2

Keywords

  • CrO
  • Ferritic steel
  • Hydrogen desorption
  • Impurity
  • Steam oxidation
  • Sulfide
  • Sulfur

ASJC Scopus subject areas

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

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