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High Temperature Oxidation of 9-12% Cr Materials P91 and P92 in Supercritical Water

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Abstract:

The article summarizes the results obtained within a project PRAMEK. The project is focused on corrosion behavior of structural materials in water environment with supercritical parameters. Ferritic - martensitic materials P91 and P92 was evaluated. Multi-layered oxide was created on materials sample surface after 1000 hours long exposures in Supercritical Water Loop (SCWL) and Supercritical Water Autoclave (SCWAc) under SCWR operational parameters (600 °C, 25 MPa). The outer layer consisted of magnetite was porous and may tend to exfoliate. The inner layer is formed by spinel with Cr and Fe oxides. Microstructure of materials P91 and P92 and surface oxidic scales were evaluated by means of light and scanning electron microscopy equipped with wave and energy spectroscopy.

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Periodical:

Key Engineering Materials (Volume 635)

Pages:

106-111

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.635.106

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Online since:

December 2014

Authors:

Zuzana Skoumalová, Jaroslav Burda, Eliška Křečanová

Keywords:

Ferritic-Martensitic 9-12% Cr Steel, High Temperature Oxidation, P91, P92, Supercritical Water Environment

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