Small-angle neutron scattering study of the wet and dry high-temperature oxidation of alumina- and chromia-forming stainless steels

G. Rother, J. R. Keiser, M. P. Brady, K. A. Unocic, L. M. Anovitz, K. C. Littrell, R. A. Peascoe-Meisner, M. L. Santella, D. J. Wesolowski, D. R. Cole

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11 Scopus citations

Abstract

Foils of T347 and an alumina-forming austenitic (AFA) stainless steel were oxidized at 800°C in dry air, air with 10% H 2O, and air with 10% D 2O. Significant changes in the small angle neutron scattering (SANS) signal were observed for the T347 stainless steel as a function of oxidation time in dry air whereas the AFA alloy showed no significant scattering changes resulting from oxidation. For both alloys, similar scattering was observed in dry and wet air (H 2O and D 2O) exposure, indicating that watervapour did not result in significant H/D retention or induce significant morphological changes in the oxide scales.

Original languageEnglish
Pages (from-to)121-132
Number of pages12
JournalCorrosion Science
Volume58
DOIs
StatePublished - May 2012

Funding

The authors thank Andrew Payzant and Volker Urban at ORNL for helpful comments on this manuscript. Research sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy. Research supported by Oak Ridge National Laboratory’s SHaRE User Facility, which is sponsored by the Office of Basic Energy Sciences, U.S. Department of Energy.

Keywords

  • A. Stainless steel
  • C. High temperature corrosion
  • C. Hydrogen permeation
  • C. Oxidation

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