Differentiation in corrosion performance of alumina forming alloys in alkali carbonate melts

Mohamedin, Esraa Hamdy,1991Chalmers tekniska högskola,Chalmers University of Technology (author)

Alkali carbonate melts are promising high temperature thermal storage media. In this work five alumina forming alloys have been exposed to a ternary LiNaK carbonate melt and CO2 at 800 °C. The corrosion propagation was found to depend on the formation of a slow-growing LiAlO2 scale. Furthermore, the two polymorphs contributing to the LiAlO2 phase were monitored for up to 1000 h: a dense α-LiAlO2 scale and γ-LiAlO2 crystallites. We suggest a growth stress assisted formation of α-LiAlO2 relaxing into the outwards growing γ-LiAlO2 phase. This implies a deceleration of the α-LiAlO2 scale growth towards a steady state-thickness.

Strach, Michal,1988Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)strach (author)
Olovsjö, Johanna NockertKanthal AB (author)
Geers, Christine,1982Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)geersc (author)
Chalmers tekniska högskolaKanthal AB (creator_code:org_t)

By the author/editor: Mohamedin, Esraa ...; Strach, Michal, ...; Olovsjö, Johanna ...; Geers, Christine ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Materials Chemis ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Metallurgy and M ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Corrosion Engine ...

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