| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Gharbi, Oumaïma
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024On the corrosion resistance of the CoCrFeMnNi high entropy alloys in chloride-containing sulfuric acid solutionscitations
- 2024Triple structuration and enhanced corrosion performance of 316L in Laser-Powder Bed Fusioncitations
- 2024On the chemistry of the conversion coatingscitations
- 2024Accelerated Discovery of Corrosion Resistant Materials for Molten Salt Applications
- 2023Ionic liquid route for the corrosion inhibition of Al alloys: the effect of butylammonium nitrate on the corrosion of AA2024-T6citations
- 2023Relantionship between the feedstock powders reactivity and the Electrochemical properties of 316L Stainless steel obtained by laser powder bed fusion
- 2022On the graphical analysis of the impedance response of passive electrodes
- 2022Micro Droplet Corrosion: Measuring Changes in Wetting and Surface Area during Electrochemical Measurements
- 2021Ionic liquids as environmentally friendly corrosion inhibitors : the inhibition of mechanism of butylammonium nitrate for Al AA2024-T6
- 2021The ionic liquid route for the development of environmentally friendly corrosion inhibitors : the inhibition of mechanism of ammonium and amino-acid based ionic liquids for high strength al alloys
- 2021Understanding the pH effect on the magnesium corrosion by means of electrochemical impedance spectroscopy
- 2021On the impedance response of a passive electrode : what is the influence of the double layer capacitance
- 2020Investigating the real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPScitations
- 2020Real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPScitations
- 2019From frequency dispersion to ohmic impedance: A new insight on the high-frequency impedance analysis of electrochemical systemscitations
- 2019Ohmic impedance : myth or reality?
- 2019On the determination of the capacitance of an interface: What can we get from cyclic voltammetry and impedance measurements?
- 2019Corrosion inhibition of a high strength AI alloy AA2024 by ionic liquids : impact of propylammonium nitrate on the onset of localized corrosion
- 2019Microstructure and corrosion evolution of additively manufactured aluminium alloy AA7075 as a function of ageingcitations
- 2019Microstructure and corrosion evolution of additively manufactured aluminium alloy AA7075 as a function of ageingcitations
- 2019On the determination of the capacitance of an interface:What can we get from cyclic voltammetry and impedance measurements?
- 2016In-situ investigation of elemental corrosion reactions during the surface treatment of Al-Cu and Al-Cu-Li alloys.
- 2016In-situ investigation of elemental corrosion reactions during the surface treatment of Al-Cu and Al-Cu-Li alloys. ; Investigations in situ des mécanismes de corrosion élémentaires durant le traitement de surface des alliages Al-Cu et Al-Cu-Li
Places of action
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document
On the graphical analysis of the impedance response of passive electrodes
Abstract
The analysis of the capacitive behavior of a passive electrode is often a difficult subject because the response obtained by electrochemical impedance spectroscopy (EIS) is characterized by a non-ideal behavior that we try to model by using a constant phase element (CPE) [1, 2]. In doing so, both the contribution of the double layer and the effects of the current and potential distributions due to the geometry of the electrode are usually neglected.In the case of the contribution of the double layer, such an approximation can be verified a posteriori when data analysis is performed assuming that each of the contributions is a capacitance and that the double layer capacitance, the value of which is usually in the range 10 to 50 µF cm-2, is at least one order of magnitude larger than the value of the impedance of the passive film. However, this simplified approach is often invalid since both the impedance of passive film and the double layer relaxation usually exhibit a non-ideal behavior, thus resulting in the use of CPEs to account for the distribution of dielectric properties of the interface as well as experimental factors (position of the reference electrode, adsorption of impurities…).We present in this work, a new method that uses the graphical analysis of the experimental data in the different frequency ranges (Figure 1), including the low-frequency domain, in order to determine the values of the capacitances without resorting to fitting procedures involving complex functions. This analysis, which is based on the electrical description of the interface, allows the determination of the thickness of a thin layer at the interface, independently of the use of a CPE to describe the distribution of time constants [3]. This will be first demonstrated on synthetic data and then used for the determination of thickness of the oxide film formed on Al electrode. In a second part, we will show that this analysis can be extended to more complicated cases, including when frequency dispersion is observed in the high frequency domain [4].In that case, the ohmic impedance needs to be properly estimated and then corrected on the experimental results before any data analysis.[1] S.P. Harrington, T.M. Devine, Analysis of electrodes displaying frequency dispersion in Mott-Schottky tests, J. Electrochem. Soc., 155 (2008) C381-C386. [2] B. Hirschorn, M.E. Orazem, B. Tribollet, V. Vivier, I. Frateur, M. Musiani, Determination of effective capacitance and film thickness from constant-phase-element parameters, Electrochim. Acta, 55 (2010) 6218-6227. [3] O. Gharbi, M.T.T. Tran, M.E. Orazem, B. Tribollet, M. Turmine, V. Vivier, Impedance Response of a Thin Film on an Electrode: Deciphering the Influence of the Double Layer Capacitance, Chemphyschem, 22 (2021) 1371-1378. [4] O. Gharbi, A. Dizon, M.E. Orazem, M.T.T. Tran, B. Tribollet, V. Vivier, From frequency dispersion to ohmic impedance: A new insight on the high-frequency impedance analysis of electrochemical systems, Electrochim. Acta, 320 (2019) 134609.