Potential-pH equilibrium diagrams (Pourbaix diagrams) for the systems Fe-Cr-CI-H2O and Fe-Cr-S-H2O at 25°C are presented. The mixed oxide FeCr2O4 and the various iron sulphides are considered. The data were selected to provide some consistency between data from different sources. The diagrams are presented for a chloride concentration that corresponds to seawater and for a sulphide concentration of 0.001 mol/kg H2S...
Key words : thermodynamics; Pourbaix diagram; 13Cr stainless steel, H2S media.