corrosion behaviour investigation of the four cr-mn-(ni-free) austenitic steels in 0.1 m h2so4 solution

in this study, the four cr-mn-(ni-free) austenitic steels were fabricated by vacuum induction furnace. then plates with 10 mm thickness were fabricated by hot-rolling. corrosion behaviour of the four cr-mn steels in 0.1 m h2so4 solution was investigated using by open-circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy (eis). the results indicated that the open-circuit potentials of the four cr-mn austenitic steels were found to shift towards positive direction. also, the potentiodynamic polarization curves suggested that the four cr-mn austenitic steels showed comparable passive behaviour in sulfuric solutions.