Influence of Cupric, Ferric, and Chloride on the Corrosion of Titanium in Sulfuric Acid Solutions Up to 85°C

Titanium is chosen as the construction material of autoclaves for pressure acid leaching of metal ores. The corrosion behavior of titanium was studied in sulfuric acid solutions with different additions of Cl−, Cu2+, and Fe3+ to simulate hydrometallurgical lixiviants at 25, 55, and 85°C. Electrochemical methods like open-circuit potential measurement, potentiodynamic polarization, potentiostatic polarization, and electrochemical impedance...