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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Energy Technologies and CO2 Management
Presentation Title Development of a Thermodynamic Model for Chromates, Molybdates, Tungstates and Vanadates Involved in the Corrosion of Steels (Fe, Cr, Ni, Mo, W, V) at High Temperatures in Atmospheres Containing O-H-S-C-Cl and Alkaline Salts
Author(s) Sara Benalia, Christian Robelin, Patrice Chartrand
On-Site Speaker (Planned) Sara Benalia
Abstract Scope This research project falls under the generic theme of modeling high-temperature processes, during energy conversion, flaking and corrosion phenomenon, for systems converting mainly organic matter into energy. Energy conversion facilities are made of a metal alloy of the Fe-Cr-Ni-V-Mo-W type and are exposed to gaseous species from combustion, or from the evaporation of ashes. Under certain conditions, highly corrosive molten salts may be formed, causing the protective oxide layer of the steel to be transformed into either chromates, molybdates, tungstates or vanadates, or their mixture. This is called 'catastrophic' corrosion. The presence of ash deposits limits the maximum operating temperature and the energy efficiency of the process. Thus, this research aims to develop a thermodynamic model including chromates, molybdates, tungstates and vanadates that may form in environments containing O-H-S-C-Cl and alkaline salts, to predict the limiting conditions at which ash deposition and corrosion can occur.
Proceedings Inclusion? Planned:

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Development of a Thermodynamic Model for Chromates, Molybdates, Tungstates and Vanadates Involved in the Corrosion of Steels (Fe, Cr, Ni, Mo, W, V) at High Temperatures in Atmospheres Containing O-H-S-C-Cl and Alkaline Salts
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