The capability to perform very user-friendly, thermochemical analyses of complex, real alloys corroding in complex, high-temperature gases has been developed. Predictions of the stabilities of complex assemblies of corrosion products formed by reactions of alloys containing Fe-Cr-Ni-Co-C-N and gases containing S-C-O-H-N species can now be done with unprecedented accuracy and generality. The thermochemical data models are based upon extensive analyses of all available thermochemical data for all possible solid and liquid compounds and solutions based upon all combinations of Fe-Cr-Ni-Co-S-CO- N and for all possible gaseous species containing S-C-O-H-N. As well, the alloying elements Al, Mo, Nb, Ti, V, W, Mn and Si are fully included in the alloy and carbonitride solution models.
Comprehensive and accurate solution models are used to assess the interactions of multiple species interactions in variable composition solid and liquid phase alloys, sulfides, oxides, carbides, and nitrides. This capability is used to predict the stable corrosion products, which are useful in inferring the dominant corrosion mechanism, in complex conditions.