Assessment of the zinc-aluminium-iron phase diagram in the zinc-rich corner

In the area of continuous galvanizing, research is necessary to improve our understanding of all the reactions that take place in the molten zinc bath. Thermodynamic information in particular is scanty and the best possible use must be made of laboratory and industrial data. This has led us to develop a physico-chemical model describing the Gibbs free energies of the liquid bath and of the dross phase in agreement with the liquidus proposed by Tang. The model has been validated using published experimental data for the activity of aluminium in galvanizing baths.