| 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
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document
Understanding the pH effect on the magnesium corrosion by means of electrochemical impedance spectroscopy
Abstract
The corrosion mechanism of magnesium has been the subject of several papers, aiming to explain all the reported phenomena occurring at the Mg/electrolyte interface in general, and the negative difference effect (NDE) particularly [1]. In fact, this phenomenon consists on an increase of the hydrogen evolution rate with anodic polarization [2]. On this aspect, many mechanisms have been proposed including the uni-positive Mg+ ion mechanism [3], the magnesium hydride (MgH2) model [4], the partially protective surface film model [5], the incomplete film univalent Mg+ ion mechanism [6], the adsorptive univalent Mg+ ion dissolution model [7], and the Mg*H/Mg*OH catalysts model [8].In this work, the pH effect on the corrosion of magnesium, at the early stages, was investigated using electrochemical impedance spectroscopy (EIS). A special attention has been paid to the low frequency (LF) inductive loops. Indeed, it is shown that depending on the pH value in acidic solution, one or two inductive time-constant can be observed (Fig. 1). On the basis of the obtained results, a model was established in view of understanding the elementary steps involved in the Mg corrosion mechanism and the impact of the pH on the kinetics of the different reactions. Interestingly, it is shown that a single mechanism can describe the corrosion behavior in the acidic to slightly alkaline pH domain (1.8 – 7.7) and that the presence of multiple LF time-constants is also to be linked to the thin oxide film present on the Mg surface.[1] J. Huang, G.-L. Song, A. Atrens, M. Dargusch, What activates the Mg surface—A comparison of Mg dissolution mechanisms, J. Mater. Sci. Technol. 57 (2020) 204–220.[2] W. Beetz, On the development of hydrogen from the anode, Lond. Edinb. Dublin Philos. Mag. J. Sci. 32 (1866) 269–278. [3] J.W. Turrentine, Reversed Electrolysis, J. Phys. Chem. 12 (1908) 448–467.[4] G.G. Perrault, Potentiostatic study of the magnesium electrode in aqueous solution, J. Electroanal. Chem. 27 (1970) 47-58. [5] G. Song, A. Atrens, D. Stjohn, J. Nairn, Y. Li, The electrochemical corrosion of pure magnesium in 1 N NaCl, Corros. Sci. 39 (1997) 855–875.[6] G.L. Song, A. Atrens, Corrosion Mechanisms of Magnesium Alloys, Adv. Eng. Mater. 1 (1999) 11-33. [7] G. Baril, G. Galicia, C. Deslouis, N. Pébère, B. Tribollet, V. Vivier, An Impedance Investigation of the Mechanism of Pure Magnesium Corrosion in Sodium Sulfate Solutions, J. Electrochem. Soc. 154 (2007) C108-C113.[8] C.D. Taylor, A First-Principles Surface Reaction Kinetic Model for Hydrogen Evolution under Cathodic and Anodic Conditions on Magnesium, J. Electrochem. Soc. 163 (2016) C602–C608.