期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2014
卷号：5
期号：6
页码：1847-1853
出版社：University of Mohammed Premier Oujda
摘要：In this paper, two stainless steels have been developed successfully. The physical metallurgy of these stainless steels was studied b y optical microscope, and X -ray diffraction (XRD) patterns. Metallography and XRD results have shown that the matrix of these stainless steels is a single γ-phase structure. Also, electrochemical behaviour of two fabricated stainless steels in 0.5M H 2 SO 4 solution was evaluated by open-circuit potential, potentiod ynamic polarization, and Mott– Schottky analysis. The potentiodynamic polarisation curves suggested that two fabricated stainless steels sho wed passive behaviour in 0.5M H 2 SO 4 solution. Mott–Schottky analysis revealed that passive films behave as n-type and p-type semiconductors at potentials below and above the flat band potential, respectively. Also based on the Mott– Schottky analysis, it was shown that donor and acceptor densities are in the order of 10 21 cm -3 and are comparable for other austenitic stainless steels in acidic environments.
