Thermodynamics of metal-gas-liquid reactions

Authors: Barry, T. I.; Dinsdale, A. T.

Source: Materials Science and Technology, Volume 3, Number 7, July 1987 , pp. 501-511(11)

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Abstract:

The hot corrosion of alloys comprises a complex series of interacting processes. Despite the difficulties involved, the thermodynamic analysis of corrosion ought to take into account the multicomponent nature of the alloy, the constitution of the gas, and the microenvironments present in the corrosion layer. Most importantly the metallic, oxide, sulphide, and salt phases ought to be treated as solutions (mixtures). The methods for assessment and calculations involving solution phases are demonstrated by reference to the salt system NaCl-NaOH-Na₂CrO₄-Na₂SO₄ and its equilibrium with Cr₂O₃ as the protective oxide layer and the gaseous combustion products. The data requirements associated with these developments and their possible application to kinetic analysis are discussed.

MST/439.

Document Type: Research article

Publication date: 1987-07-01

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Materials Science and Technology is the successor of two previous titles, for which digitised archives are available: Metal Science (Vols. 1—17; 1967—84) and Metals Technology (Vols. 1—11; 1974—84).

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