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Dispersion of complex carbides at the oxidation front during the oxidation of 9Cr-1Mo steel

journal contribution
posted on 16.12.2019 by Lawrence Coghlan, S Yan, Aya Shin, J Pearson, Mark Jepson, Rebecca Higginson
To better understand oxidation and carburisation processes taking place during exposure of 9Cr-1Mo steel experimental samples have been exposed at 600°C and 620°C to a CO2 rich atmosphere for various exposure times. Complex multi-elemental carbides form showing a range of compositions, with some showing coring/elemental segregation. Certain carbides show both M7C3 and M23C6 within a single multi-component carbide. At the oxidation front some carbides resist oxidation through growth of a Cr rich oxide shell. Carbides within both substrate and oxide have been characterised with mechanisms being proposed for the complex interactions taking place within both the substrate and oxide.

Funding

EDF Energy

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Corrosion Science

Volume

165

Pages

108389

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier Ltd.

Publisher statement

This paper was accepted for publication in the journal Corrosion Science and the definitive published version is available at https://doi.org/10.1016/j.corsci.2019.108389.

Acceptance date

13/12/2019

Publication date

2019-12-16

Copyright date

2020

ISSN

0010-938X

Language

en

Depositor

Dr Rebecca Higginson. Deposit date: 13 December 2019

Article number

108389

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