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Modelling and parameter comparison of equivalent circuits on the basis of impedance measurements of stainless steels
Author(s) -
Slemnik M.
Publication year - 2006
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200503910
Subject(s) - passivity , equivalent circuit , electrical impedance , work (physics) , continuation , electronic circuit , electrochemistry , electrical element , materials science , mechanics , thermodynamics , basis (linear algebra) , chemistry , computer science , mathematics , physics , engineering , electrical engineering , electrode , voltage , geometry , programming language
In our former work [1] we have discussed the impedance of differently heat treated steels X20Cr13 in 0.1 M H 2 SO 4 , undergoing an active passive transition. Impedance spectra were interpreted in terms of a model by Armstrong [2, 3], describing the electrochemical reaction at interfaces with adsorbed intermediates. The present work was performed in order to study this phenomenon in more detail, with computer simulations of a new created and more convenient equivalent circuit in comparison with the former model. Computer simulations of equivalent circuits were also made in the region of passivity which was also continuation of our earlier work [4]. In this sense the entire study for these steels was completed by collating distinctive parameter values, demonstrating electrochemical characteristics of steel X20Cr13, undergoing different heat treatments in the active‐passive and passive region.