Comparisons of I^- and Cl^- concentrations on the corrosion behavior of TA4 titanium alloy in azeotropic acetic acid solutions

The corrosion problems of TA4 titanium alloy trays were urgent to be solved in the safe and steady production process acetic acid distillation column. According real environment column, behavior simulated azeotropic solutions with a series I - Cl concentrations was investigated by electrochemical impedance spectroscopy (EIS) potentiodynamic polarization measurements. experimental results showed that much easier corrosive test solution, passive film resistance R f , charge transfer ct Warburg W decreased obviously increasing concentration . rate 1.79 times higher than on average when increased from 0.1 wt.% 5 wt.%. inhibition formation surface is stronger