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Relevance of other parameters than carbon activity in defining the severity of a metal dusting environment

Vande Put, Aurélie and Fabas, Aurélien and Doublet, Sébastien and Monceau, Daniel Relevance of other parameters than carbon activity in defining the severity of a metal dusting environment. (2017) Oxidation of Metals, 87 (5-6). 655-666. ISSN 0030-770X

(Document in English)

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Official URL: http://dx.doi.org/10.1007/s11085-017-9717-5


Two metal dusting experiments were carried out at 570 °C on 800HT and HR120 alloys, for more than 6000 h. The tests were designed to run at different total pressures and gas velocities but similar carbon activities and oxygen partial pressures. For a given alloy, shorter average incubation times and larger mass losses were observed at high pressure. For both tests, HR120 alloy underwent greater mass losses and exhibited a higher pit density. For nearly all samples, pit densities greatly differed between both sides of the specimens. Therefore, the carbon and oxygen activities alone are not sufficient to evaluate the aggressiveness of a metal dusting environment. Greater degradation was the result of the association of a higher gas velocity with a higher total pressure and a finer alloy grain size.

Item Type:Article
Additional Information:Thanks to Springer Verlag editor. The original PDF of the article can be found at https://link.springer.com/article/10.1007%2Fs11085-017-9717-5
HAL Id:hal-01579441
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 > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:31 Aug 2017 08:24

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