رفتار خوردگی فولادهای آستنیتی کروم- منگنزدار- (بدون نیکل) در یک محیط اسیدی

In this study, four cr-mn-(ni-free) austenitic steels were fabricated by vacuum induction furnace. then plates with 10 mm thickness were fabricated by hot-rolling. metallography observations have shown that these steels hasve a single ?-phase structure. the corrosion behaviour of these steels in 0.01 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 excellent passive behaviour