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The effect of microstructure on the oxidation and carburisation of 9Cr-1Mo steel exposed to CO2

journal contribution
posted on 02.08.2021, 15:35 by Lawrence Coghlan, Sabrina Yan, Aya Shin, Jonathan Pearson, Mark JepsonMark Jepson, Rebecca HigginsonRebecca Higginson
To understand the effect of microstructure on the oxidation characteristics of 9Cr-1Mo steel, experimental material with two different starting microstructures (ferritic and martensitic) were exposed to a CO2 rich atmosphere at 600 °C and 640 °C for up to ∼7000 hours.

The microstructure influences the size and distribution of carbides forming within the 9Cr-1Mo steel exposed to a CO2 rich atmosphere. These differences lead to elemental segregation during carburisation and oxidation. This elemental segregation influences the oxidation characteristics of the 9Cr-1Mo steel and the morphology of the internal oxidation zone, and subsequently the spinel structure shows ghosts of the prior substrate microstructure.

Funding

EDF Energy

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Corrosion Science

Volume

191

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

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.2021.109720.

Acceptance date

23/07/2021

Publication date

2021-07-28

Copyright date

2021

ISSN

0010-938X

Language

en

Depositor

Dr Mark Jepson. Deposit date: 28 July 2021

Article number

109720