Corrosion of Alumina Ceramics in an Aqueous Solution of Sodium Chloride

Abstract:

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Two alumina based ceramics with 99.99 % and 95 % of Al2O3 were evaluated after dissolution in an aqueous solution containing 0.5 mol/l NaCl at temperatures of 150 and 200 °C. The weight loss of liquid phase sintered alumina was mainly attributed to congruent dissolution of SiO2 and CaO from grain-boundary amorphous film, which is accelerated at higher temperature, accompanied by precipitation of silicaceous phases from oversaturated solution at 200 °C. Pure polycrystalline alumina corroded by loss of alumina grains, which do not dissolve in the corrosion media.

Info:

Periodical:

Edited by:

J. Dusza, R. Danzer, R. Morrell and G.D. Quinn

Pages:

283-286

DOI:

10.4028/www.scientific.net/KEM.409.283

Citation:

D. Galusková et al., "Corrosion of Alumina Ceramics in an Aqueous Solution of Sodium Chloride", Key Engineering Materials, Vol. 409, pp. 283-286, 2009

Online since:

March 2009

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Price:

$35.00

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