EIS study on passive films of AISI 304 stainless steel in oxygenous sulfuric acid solution

Electrochemical impedance spectroscopy (EIS) and Kramers–Kronig (K–K) transforms were made on American Iron and Steel Institute (AISI) 304 stainless steel (SS) in naturally aerated sulfuric acid solution at room temperature. The K–K relations testify that the systems under investigation comply with...

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Bibliographic Details
Published in:	Surface and interface analysis Vol. 41; no. 6; pp. 531 - 539
Main Authors:	Lai, Weiya, Zhao, Wenzhen, Wang, Feng, Qi, Chengzhu, Zhang, Jun
Format:	Journal Article
Language:	English
Published:	Chichester, UK John Wiley & Sons, Ltd 01-06-2009 Wiley
Subjects:	304 stainless steel Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science; rheology electrochemical impedance spectroscopy Exact sciences and technology Kramers-Kronig transforms Physics polarization resistance reaction model electrochemical impedance spectroscopy 304 stainless steel Kramers-Kronig transforms Stainless steels polarization resistance Kramers Kronig analysis reaction model
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Summary:	Electrochemical impedance spectroscopy (EIS) and Kramers–Kronig (K–K) transforms were made on American Iron and Steel Institute (AISI) 304 stainless steel (SS) in naturally aerated sulfuric acid solution at room temperature. The K–K relations testify that the systems under investigation comply with the linearity, causality, and stability constraints of linear system theory (LST) and thereby validate the EIS data. The polarization resistance decreased with removing of passive film and pitting formed in the passive layer, due to layer thinning or pitting caused by chloride. The impedance data for 304 SS with passive films can be accurately modeled using individual components of the equivalent circuits. The polarization resistances (Rp) of the 304 SS can be confirmed by Nyquist plots and estimated from the anodic polarization curves. The reaction model of the dissolution‐passivation process of 304 SS in acid solution is proposed. Copyright © 2009 John Wiley & Sons, Ltd.
Bibliography:	istex:E63B553CAE46B5A5B3F15DFDAF1B551F0EF360E5 ark:/67375/WNG-STJ98TL4-S ArticleID:SIA3063 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0142-2421 1096-9918
DOI:	10.1002/sia.3063