The dissolution of transition metal oxides in molten carbonates is of interest for studies of hot corrosion and of the degradation of cathodes in molten salt fuel cells. This dissolution is generally believed to be a function of the basicity of the solvent salt, and consequently an understanding of the relationship between basicity and solubility of metal oxides is important. When the solvent is a mixture of salts, the basicity is regarded as a common ionic activity which satisfies the dissociation constants of both component carbonates. A method for calculating basicity similar to that for calculating ionic activities of minor components in aqueous solutions has been used. It is the purpose of this paper to report on studies of the relationship between the solubility of NiO and basicity in mixtures of alkali metal carbonates. Mixtures of K2CO3-Li2CO3 and of K2CO3-Na2CO3 were used as solvents.

Subject
Acids, Ions, Composition, Salts, Oxides, Slopes, Dissolution, Solubility, Metal oxides, Solvents, Mixtures, Constants, Samples
© 1986 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1986
Association for Materials Protection and Performance (AMPP)
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