Kinetics of Some Iron-Based Alloys in Industrial CO₂: Formation of Wüstite Phase

Abstract:

This work compares the oxidation behaviour of three iron-based substrates (C40E, Invar and 304L) in CO2 industrial gas, in order to determine the conditions for producing wüstite (Fe1-xO), on the basis of kinetic and morphologic studies. For the three alloys at the beginning of the reaction, wüstite formed under 105 Pa of CO2 following a rate law          RT 220000 10.2 P e dt d( m/S) CO2 . For 304L, formation of a spinel phase chromite briefly preceded it during a first step. Magnetite appeared for long times of experiment, in the case of Invar and 304L. This can be explained by the stopping of iron outer diffusion. These results are discussed according to the literature and thermodynamic data. They open new fields for coating these alloys by plasma spray processes.

• Periodical: Materials Science Forum (Volumes 595-598)
• Pages: 1153-1161
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.595-598.1153
• Online since: September 2008
• Authors: Stephane Valette, Sebastien Menecier, Fabrice Goutier, Pierre Lefort
• Keywords: Carbon Dioxide CO₂, Electron Microscopy, Iron Based Alloys, Kinetic, Magnetite, Oxidation, Plasma Coating, Wüstite

References

This article has no references.