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：4
页码：1059-1068
出版社：University of Mohammed Premier Oujda
摘要：Four different multiphase Fe-xC alloys are prepared with different ferrite and cementite amounts. X-ray diffraction analysis is used to identify the present phases in the samples. The corrosion process was evaluated by DC measurements and electrochemical impedance spectroscopy (EIS). Behaviour of Fe-xC alloys in sulfuric acid solution is greatly affected by increasing carbon concentration. Carbon increases the corrosion rate, and influences the adherence of passive film. The synergic effect of cementite is highlighted; corrosion rate is dependent on the distribution of cementite in the microstructure. The rate of the corrosion reactions increased markedly, by decreasing the average pearlite lamellae spacing in a given alloy.
