Corrosion and SCC properties of fine grain stainless steel in subcritical and supercritical pure water

Y. Tsuchiya, F. Kano, N. Saito, M. Ookawa, J. Kaneda, Nobuyoshi Hara

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)

Abstract

Fine grain austenitic stainless steels developed by means of cold work and a heat treatment process to improve the material properties for use in supercritical water-cooled power reactor (SCWR). The corrosion and Stress Corrosion Cracking (SCC) properties, were subsequently evaluated and described in the present paper. Results of corrosion test indicated that the corrosion rates of fine grain 304L SS and fine grain 310S SS were as low as 1/30̃1/70 of those of the normal grain size Type 304L SS and Type 310S SS at 550°C. It was found that the grain refinement improved corrosion resistance significantly in SCW. The corrosion of austenitic stainless steel in super critical water consisted of both oxidization film growth and release into water. Results of slow strain rate test (SSRT) showed that the inter granular (IG) SCC susceptibility of fine grain material is low at 550°C and 290°C. From these results, fine grain materials are considered to be promising candidates for application as SCWR core components.

Original languageEnglish
Pages (from-to)74151-741513
Number of pages667363
JournalNACE - International Corrosion Conference Series
Publication statusPublished - 2007 Dec 1
EventCorrosion 2007 - Nashville, TN, United States
Duration: 2007 Mar 112007 Mar 15

Keywords

  • Corrosion rate
  • Fine grain
  • IGSCC
  • SCC susceptibility
  • Supercritical water-cooled power reactor
  • Type 304 SS
  • Type 310 SS
  • Type316LSS

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Materials Science(all)

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