An Electrochemical Impedance Spectroscopic Study of the Passive State on AISI 304 Stainless Steel. (16th January 2011)

• Record Type: Journal Article
• Authors: Fattah-alhosseini, A.; Taheri Shoja, S.; Heydari Zebardast, B.; Mohamadian Samim, P.
• Other Names: Zhang Sheng S. Academic Editor.
• Is Part Of: International journal of electrochemistry. Volume 2011(2011)
• Publication Date: 2011-01-16
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; 660.297
• DOI: 10.4061/2011/152143
• Languages: English
• ISSNs: 2090-3529

Abstract

Abstract : The passivity and protective nature of the passive films are essentially related to ionic and electronic transport processes, which are controlled by the optical and electronic properties of passive films. In this study, the electrochemical behavior of passive films anodically formed on AISI 304 stainless steel in sulfuric acid solution has been examined using electrochemical impedance spectroscopy. AISI 304 in sulphuric acid solution is characterized by high interfacial impedance, thereby illustrating its high corrosion resistance. Results showed that the interfacial impedance and the polarization resistance (R pol ) initially increase with applied potential, within the low potential passive. However, at a sufficiently high potential passive (E > 0.4 V), the interfacial impedance and the polarization resistance decrease with increasing potential. An electrical equivalent circuit based on the impedance analysis, which describes the behavior of the passive film on stainless steel more satisfactorily than the proposed models, is presented.