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JOM

, Volume 69, Issue 2, pp 207–216 | Cite as

Effect of Pressures on the Corrosion Behaviours of Materials at 625°C

  • W. Li
  • X. Huang
  • J. Li
  • O. T. Woo
  • R. Sanchez
  • C. D. Bibby
Article

Abstract

The corrosion behaviors of austenitic stainless steels (SS) 310, 304 and Ni- and Fe-based A-286 exposed to 0.1 MPa, 8 MPa and 29 MPa at 625°C for 1000 h were investigated. These represent exposure to superheated steam, subcritical and supercritical water (SCW) at 625°C, respectively. As SS 310 showed the smallest weight change, the oxide cross-sections made from 310 samples were examined by transmission electron microscopy. The results revealed a single-layer oxide at 0.1 MPa and dual-layer oxides at 8 MPa and 29 MPa, followed by a Cr-depleted region into the austenite substrate. The compositions of the inner oxides at 8 MPa and 29 MPa are Cr-rich and largely similar to those of the single-layer oxides at 0.1 MPa exposure. These results suggest that corrosion testing in superheated steam may be a suitable surrogate for scoping tests of materials under SCW conditions at >650°C.

Keywords

Austenite Austenitic Stainless Steel Superheated Steam M23C6 Carbide Subcritical Water 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors are grateful for financial support from the National Sciences and Engineering Research Council of Canada (NSERC)/Natural Resources of Canada (NRCan)/Atomic Energy of Canada Limited (AECL) Generation IV Technologies Program; and the facility support from Carleton University. Thanks are also given to J. Smith from Canadian Nuclear Laboratories (CNL) for helpful discussions.

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Copyright information

© Crown Copyright 2016

Authors and Affiliations

  1. 1.Canadian Nuclear LaboratoriesChalk RiverCanada
  2. 2.Department of Mechanical and Aerospace EngineeringCarleton UniversityOttawaCanada
  3. 3.CanmetMATERIALSHamiltonCanada
  4. 4.Deep RiverCanada

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