Chandraambhorn, Walairat

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Chandraambhorn, Walairat
Alternative Name
Chandra-Ambhorn, Walairat
Chandra-ambhorn, Walairat
Chandra-Ambhorn, W.
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Email
walairat.ch@kmitl.ac.th

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    Item type:Publication,
    Effect of water vapour on the high temperature oxidation of stainless steels
    (2020-01-01)
    Chandra-Ambhorn, Somrerk
    ;
    Wongpromrat, Patthranit
    ;
    Thublaor, Thammaporn
    ;
    Chandra-Ambhorn, Walairat
    This chapter primarily reviews the nature of water vapour when it presents in bulk gas. The change in a ratio between water vapour and corresponding dissociated hydrogen, which determine the thermodynamic stability of the oxide formation, is analysed when the oxidation kinetics are linear and parabolic. When water vapour reaches the solid/gas interface, chromium species volatilisation and oxidation controlled by surface reaction can occur. The adsorbed water vapour can be further incorporated into the oxide possibly in the form of hydrogen defects. The role of these defects on altering the defect structure of the oxide is discussed. Finally, characteristics of the oxide scale on stainless steels formed in the atmosphere containing water vapour are reviewed.
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    Item type:Publication,
    Development of sofc interconnect stainless steels
    (2020-01-01)
    Chevalier, Sébastien
    ;
    Combemale, Lionel
    ;
    Popa, Ioana
    ;
    Chandra-Ambhorn, Somrerk
    ;
    Chandra-Ambhorn, Walairat
    The chapter introduces components and working principle of solid oxide fuel cells (SOFCs). It is followed by the explanation on the choices of materials focussing on ferritic stainless steels. The review is further made on the required properties of these steels, i.e. low oxidation rate, low chromium species volatilisation rate, high electrical conductivity and good scale adhesion. For the oxidation aspect, the behaviour of stainless steel interconnect in cathode, anode (hydrogen and biogas), and dual atmospheres are described. Surface modification by pre-oxidation and coatings to improve the oxide electrical conductivity and to reduce chromium species volatilisation is finally reviewed.