Corrosion resistance and cracking susceptibility of 316L stainless steel in sulfuric acid-containing supercritical water

Yutaka Watanabe, Hiroshi Abe, Yuzo Daigo, Takashi Nishida

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

Cracking susceptibility and characteristics were studied on non-sensitized UNS S31603 stainless steel by slow strain rate tests in supercritical and sub-critical water containing 0.01 mole/kg-H2SO4 at 400°C/25 MPa, 400°C/60 MPa, and 360°C/25 MPa with two levels of oxygen concentration, 8 and 800 ppm. The stainless steel had excellent corrosion resistance in 0.01 mole/kg-H2SO4 at 400°C when oxygen level was as high as 800 ppm and this was attributed to a thin and compact scale of Fe-Cr spinel and γ-Fe2O3 formed on the alloy. Cracking severity was higher for the supercritical conditions at 400°C than in the sub-critical water at 360°C. Although intergranular mode was dominant, a few traces of transgranular cracks were found in the less oxidizing 8 ppm O2 condition.

Original languageEnglish
Publication statusPublished - 2004 Oct 15
EventCorrosion 2004 - New Orlean, LA, United States
Duration: 2004 Mar 282004 Apr 1

Other

OtherCorrosion 2004
CountryUnited States
CityNew Orlean, LA
Period04/3/2804/4/1

Keywords

  • Corrosion
  • Intergranular crack
  • Oxygen concentration
  • Slow strain rate test
  • Stainless steel
  • Stress corrosion cracking
  • Sulfuric acid
  • Supercritical water

ASJC Scopus subject areas

  • Energy(all)

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