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Metal dusting corrosion of austenitic alloys at low and high pressure with the effects of Cr, Al, Nb and Cu

Fabas, Aurélien and Vande Put, Aurélie and Doublet, Sébastien and Domergue, Didier and Salem, Mehdi and Monceau, Daniel Metal dusting corrosion of austenitic alloys at low and high pressure with the effects of Cr, Al, Nb and Cu. (2017) Corrosion Science, 123. 310-318. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2017.04.015

Abstract

Commercial and model alloys were exposed at 570°C to metal dusting conditions at 1 and 21bar in CO-H2-H2O and CO-H2-CO2-CH4-H2O atmospheres, respectively, with similar ac and PO2. γ” precipitation beneath the surface of 625 superalloy was due to Nb diffusion toward the Cr-depleted zone formed during oxidation. 693 superalloy was more carburised than 690 superalloy. α-Al2O3 formation was believed to induce cracks through the oxide scale, resulting in the alloy carburisation. Cu addition to a FeNiCr model alloy lead to the formation of an almost continuous Cu layer at the oxide/metal interface, greatly improving the metal dusting resistance.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Air Liquide (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Yves MOMBOISSE
Deposited On:29 May 2019 06:39

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