期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：s
页码：4883-4893
出版社：University of Mohammed Premier Oujda
摘要：The electrochemical behavior of copper immersed in synthetic seawater (EMS) polluted by sulfide ions using Na2S, 9H2O was investigated by the corrosion potential, cyclic voltammetry measurements (CV), potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS). The corrosion studies are realized in synthetic seawater polluted by the sulfides at different concentrations in presence and absence of chitosan polymer chosen as tested inhibitor. The evolution of the open circuit potential of copper immersed in polluted seawater shows that Ecorr decreases towards more negative values after addition of S2- . The CVs obtained indicate that the sulfide ions increase the current density of the oxidation peak of copper. The polarization curves and Nyquist diagrams mentioned that the sulfides addition provokes a diffusion palier in the anodic curve, so, the oxygen oxidation reaction was controlled by a diffusion mechanism in the presence of sulfides. However, the addition of different concentration of chitosan reduces the oxidation of copper in the presence of sulfides, which can suggest that chitosan protects the copper surface against the polluted and aggressive marine environment.
