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Effects of water vapour and oxygen partial pressures on low carbon steel oxidation in N2–H2–H2O mixtures / H. Yin in Materials and corrosion, Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 10 (Octobre 2012) . - pp. 869–877 Titre : Effects of water vapour and oxygen partial pressures on low carbon steel oxidation in N2–H2–H2O mixtures Type de document : texte imprimé Auteurs : H. Yin, Auteur ; W. Y. D. Yuen, Auteur ; D. J. Young, Auteur Année de publication : 2013 Article en page(s) : pp. 869–877 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : High  temperature  oxidation;  hydroxyl;  low  carbon  steel;  water  vapour  effect Résumé : A low carbon, low silicon steel was oxidised at temperatures of 900–1000 °C in flowing N2–H2–H2O gas mixtures in which oxygen and water vapour partial pressures were varied independently. Scales of dense, single-phase, coarse grained wüstite grew rapidly, according to parabolic kinetics. Both the scaling rate and the oxide grain growth increased with PO2 at constant PH2O and also with equation image at constant PO2. An inert marker experiment showed that significant oxygen transport but majority metal transport supported scale growth. Gas composition effects are interpreted using point defect models involving formation of hydroxyl species on anion sites as well as cation vacancies. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201206570/abstract [article] Effects of water vapour and oxygen partial pressures on low carbon steel oxidation in N2–H2–H2O mixtures [texte imprimé] / H. Yin, Auteur ; W. Y. D. Yuen, Auteur ; D. J. Young, Auteur . - 2013 . - pp. 869–877. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 10 (Octobre 2012) . - pp. 869–877 Mots-clés : High  temperature  oxidation;  hydroxyl;  low  carbon  steel;  water  vapour  effect Résumé : A low carbon, low silicon steel was oxidised at temperatures of 900–1000 °C in flowing N2–H2–H2O gas mixtures in which oxygen and water vapour partial pressures were varied independently. Scales of dense, single-phase, coarse grained wüstite grew rapidly, according to parabolic kinetics. Both the scaling rate and the oxide grain growth increased with PO2 at constant PH2O and also with equation image at constant PO2. An inert marker experiment showed that significant oxygen transport but majority metal transport supported scale growth. Gas composition effects are interpreted using point defect models involving formation of hydroxyl species on anion sites as well as cation vacancies. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201206570/abstract