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۱Evaluation of corrosion behaviour on Mn–Cr austenitic steels using 0.1 M HCl solution
اطلاعات انتشار: journal of advanced materials and processing، دوم،شماره۱، ۲۰۱۴، سال
تعداد صفحات: ۹
One of the attractive low activation steels is the austenitic Mn–Cr steel from the view point of waste disposal because of few long–lived nuclides. In this paper, three types of Mn–Cr austenitic steels were fabricated by vacuum induction furnace. Then plates with 10 mm thickness were fabricated by hot–rolling. The physical metallurgy of these steels was studied by the corrected Schaeffler diagram, X–ray and electron diffraction patterns. The corrected Schaeffler diagram and X–ray diffraction (XRD) results have shown that the matrix of these steels is a single γ–phase structure. Also, the corrosion behaviour in 0.1M HCl solution was evaluated by open–circuit potential, Tafel polarization, and electrochemical impedance spectroscopy (EIS). The results of Tafel polarization experiments show corrosion current density of all three Cr–Mn steels is in the range of 10–4 A cm–2 which indicates their appropriate resistance in this acidic environment. The Nyquist plots showed that polarization resistance from the first to third Cr–Mn steels decreases. This trend is due to increase in corrosion current density which corresponds to Tafel polarization curves.
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