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Oxidation of a novel CeO2-dispersed chromium coating in wet air / X. Peng in Materials and corrosion, Vol. 62 N° 6 (Juin 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 6 (Juin 2011) . - pp. 514–520 Titre : Oxidation of a novel CeO2-dispersed chromium coating in wet air Type de document : texte imprimé Auteurs : X. Peng, Auteur ; J. Yan, Auteur ; L. Zheng, Auteur Année de publication : 2011 Article en page(s) : pp. 514–520 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Chromized  coating  Electrodeposition  Ni–CeO2  composite  film  Pack  cementation  Wet  oxidation Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : An electrodeposited Ni–CeO2 composite was used as a “precursor film” for a novel CeO2-dispersed chromium coating deposited using a traditional pack cementation method. The substrate was a carbon steel. For comparison, chromium coatings were also prepared on the untreated and pure Ni-film-treated carbon steel using the same pack cementation conditions. Oxidation in 5% O2 + 40% H2O + N2 at 900 °C showed that, compared to the CeO2-free coating counterparts, the CeO2-dispersed chromium coating exhibited greatly increased oxidation resistance, owing to the development of a denser and more slowly growing chromia scale. The slow growth of the scale was correlated with the CeO2 dispersion exerting the so-called “reactive elemental effect (REE)” on oxidation. The oxidation mechanisms in wet air of the various types of coatings were compared to those in dry air and are fully discussed in this work. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005868/abstract [article] Oxidation of a novel CeO2-dispersed chromium coating in wet air [texte imprimé] / X. Peng, Auteur ; J. Yan, Auteur ; L. Zheng, Auteur . - 2011 . - pp. 514–520. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 6 (Juin 2011) . - pp. 514–520 Mots-clés : Chromized  coating  Electrodeposition  Ni–CeO2  composite  film  Pack  cementation  Wet  oxidation Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : An electrodeposited Ni–CeO2 composite was used as a “precursor film” for a novel CeO2-dispersed chromium coating deposited using a traditional pack cementation method. The substrate was a carbon steel. For comparison, chromium coatings were also prepared on the untreated and pure Ni-film-treated carbon steel using the same pack cementation conditions. Oxidation in 5% O2 + 40% H2O + N2 at 900 °C showed that, compared to the CeO2-free coating counterparts, the CeO2-dispersed chromium coating exhibited greatly increased oxidation resistance, owing to the development of a denser and more slowly growing chromia scale. The slow growth of the scale was correlated with the CeO2 dispersion exerting the so-called “reactive elemental effect (REE)” on oxidation. The oxidation mechanisms in wet air of the various types of coatings were compared to those in dry air and are fully discussed in this work. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005868/abstract