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Détermination de grandeurs physico-chimiques dans les verres fondus - Relation avec le comportement en corrosion du chrome et d'alliages chromine-formeurs

Abstract : The aims of this work were : - To build a basicity scale in glass melts. A specific electrochemical cell was designed to measure in situ the Na2O activities. This method allowed the basicity measurement of several silicate melts (of with simplified and industrial compositions) to compare these glasses between each other and to criticise the existing glass basicity models. - To determine the Cr2O3 solubility in glass melts. The chromium content that is dissolved in the glass depends on experimental temperature, glass basicity, melt structure and pO2 in the atmosphere surrounding the glass. Cr2O3 exhibits an amphoteric behaviour in glass melts. -To study the interaction between Cr metal and Na2O-xSiO2 glass melts in order to determine the influence of glass basicity, experimental temperature and partial pO2 on chromium corrosion kinetics and mechanism.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2005_0155_ABDELOUHAB.pdf
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https://hal.univ-lorraine.fr/tel-01746648
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Submitted on : Thursday, March 29, 2018 - 10:41:53 AM
Last modification on : Wednesday, March 24, 2021 - 10:24:04 AM

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  • HAL Id : tel-01746648, version 1

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Sandra Abdelouhab. Détermination de grandeurs physico-chimiques dans les verres fondus - Relation avec le comportement en corrosion du chrome et d'alliages chromine-formeurs. Autre. Université Henri Poincaré - Nancy 1, 2005. Français. ⟨NNT : 2005NAN10155⟩. ⟨tel-01746648⟩

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