Corrosion Behavior of Austenitic and Ferritic/martensitic Steels Exposed in Supercritical Water with Dissolved Oxygen

Abstract:

The corrosion behaviors of ferritic/martensitic steel P92, austenitic stainless steel TP347HFG and HR3C have been investigated in supercritical water (SCW) at 550°C under 25MPa with 2ppm dissolved oxygen. After 600h exposue, all the samples formed a stable oxide layer, but of varying thickness and microstructure. A typical dual-layered oxide film on P92 and a single-layered structure on TP347HFG and HR3C were observed by SEM and EDS. Further XRD studies indicated the compositions of oxide layers weren’t independent to the type of the used steel. In comparison with ferritic/martensitic steel, austenitic steel showed a higher corrosion resistance.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 2916-2919
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.2916
• Online since: July 2011
• Authors: Naiqiang Zhang, Yang Bai, Xiao Na Yuan, Bao Rang Li, Hong Xu
• Keywords: Austenitic Steel, Ferritic/Martensitic Steel, Oxide Layer, Supercritical Water

References

[1] K.H. Mayer, et al. in: International Joint Power Generation Conference, Vol. 33, 1998, pp.831-841.

[2] T.R. Allen, K. Sridharan et al. in: PREPRINT–ICPWS XV, Berlin, (2008).

[3] K. Yin, S. Qiu, Rui Tang et al.: The Journal of Supercritical Fluids Vol. 50 (2009), p.235–239.

[4] P. Ampornrat, G.S. Was: Journal of Nuclear Materials Vol. 371 (2007), p.1–17.

[5] G.S. Was, P. Ampornrat: Journal of Nuclear Materials Vol. 371 (2007), p.176–201.

[6] X. Luo, R. Tang: Journal of Nuclear Engineering and Technology Vol. 40 (2007), pp.147-154.

[7] R.B. Dooley: Cycle chemistry guidelines for fossil plants: Oxygenated Treatment (EPRI, 2005).