Evaluation of corrosion behaviour on Mn-Cr austenitic steels using ۰.۱ M HCl solution
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JMATPR-2-1_007
تاریخ نمایه سازی: 12 مهر 1400
Abstract:
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 ۱۰ 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 ۰.۱M 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 ۱۰-۴ A cm-۲ 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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Authors
Arash Fattah-alhosseini
Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran.
B. Izadi
Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran.
M. Asadi Asadabad
Materials Research School, Nuclear Science and Technology Research Institute, Isfahan, Iran.
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