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Aplicacion de un puente LCR en la caracterizacion de superficies de niquel tratadas voltamperometricamente en medio acido en ausencia y presencia de ion cloruro
Impedance spectra for nickel electrodes at his corrosion potential after voltammetric treatment in acid media has been obtained. A LCR bridge has been used, controlling the applied potential by means of a potentiostat. The passive layer, generated after successive potential scans, has been characterized by means of the interfacial double layer capacitance and the faradaic impedance. The generalized corrosion, and also the localized attack, have been observed by means of scanning electron microscopy (SEM), whilst the scanning tunnelling microscopy (STM) has been used in order to realize the morphological analysis of the surfaces. In this way we want to correlate the morphological changes in the electrode surface after the successive scans in the acid media in absence and in presence of chloride with the impedance electrochemical response of the interface. When chloride is present in the acid media the charge transport across the interface is less impeded. The localized corrosion damages the passive layer electrogenerated after successive scans.
Aplicacion de un puente LCR en la caracterizacion de superficies de niquel tratadas voltamperometricamente en medio acido en ausencia y presencia de ion cloruro
Impedance spectra for nickel electrodes at his corrosion potential after voltammetric treatment in acid media has been obtained. A LCR bridge has been used, controlling the applied potential by means of a potentiostat. The passive layer, generated after successive potential scans, has been characterized by means of the interfacial double layer capacitance and the faradaic impedance. The generalized corrosion, and also the localized attack, have been observed by means of scanning electron microscopy (SEM), whilst the scanning tunnelling microscopy (STM) has been used in order to realize the morphological analysis of the surfaces. In this way we want to correlate the morphological changes in the electrode surface after the successive scans in the acid media in absence and in presence of chloride with the impedance electrochemical response of the interface. When chloride is present in the acid media the charge transport across the interface is less impeded. The localized corrosion damages the passive layer electrogenerated after successive scans.
Aplicacion de un puente LCR en la caracterizacion de superficies de niquel tratadas voltamperometricamente en medio acido en ausencia y presencia de ion cloruro
Application of an LCR bridge in the characterization of nickel surfaces voltametrically treated in acid media in absence and in presence of chloride ion
Gregori, J. (Autor:in) / Agrisuelas, J. (Autor:in) / Gimenez, D. (Autor:in) / Pena, M.P. (Autor:in) / Garcia-Jareno, J.J. (Autor:in) / Vicente, F. (Autor:in)
Revista de Metalurgia ; 39 ; 346-356
2003
11 Seiten, 25 Quellen
Aufsatz (Zeitschrift)
Unbekannt
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