Abstract

PIRATOBA MORALES, ULISES; MARINO CAMARGO, ÁLVARO  and  OLAYA FLOREZ, JOHN JAIRO. ELECTROCHEMICAL IMPEDANCE - INTERPRETATION OF TYPICAL DIAGRAMS WITH EQUIVALENT CIRCUITS. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.164, pp.69-75. ISSN 0012-7353.

In the last time the Electrochemical Impedance (EI) has been increasingly used in the material characterization related to electro-catalysis and corrosion phenomena. This work shows physical, analytic and graphic analysis of one of the equivalent circuits more used for the adjustment of data and diagrams of Electrochemical Impedance. One indicate the way to deduce the values of some useful parameters in the fitting processes to the transfer function of some equivalent circuits, and the relationship between these values and the form of the EI diagrams. The processes displayed here has been applied to the analysis of electrochemical impedance data of a steel AISI 1055 in HCl at 3% and ten CrN/Cr multilayers of period Λ = 100 nm, deposited on H13 in NaCl at 3%.

Keywords : Electrochemical Impedance; EI diagrams.

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