Potential-pH Diagram of the Antimony-Water System

This is the authors' abstract. We don't add key points for this paper.

Using methods and conventions described previously together with the available thermodynamic and electrochemical data, equations have been formulated and represented as a potential-pH equilibrium diagram of the antimony-water system for 25 °C. Other diagrams are presented for the domains of solubility, predominance of ions, and for corrosion. The reason for the observed resistance of antimony coatings to hydrochloric and hydrofluoric acids is made clear. Applications are made to the antimony electrodes. The free energies of formation of the antimonate, Sb(OH)6-, and the Sb02+ ion have been calculated and are given.