| Autre titre | Ag+ interference from Ag/AgCl wire quasi-reference counter electrode inducing corrosion potential shift in an oil-immersed scanning micropipette contact method measurement |
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| Téléchargement | - Voir les données supplémentaires : Ag⁺ interference from Ag/AgCl wire quasi-reference counter electrode inducing corrosion potential shift in an oil-immersed scanning micropipette contact method measurement (PDF, 1.0 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/acs.analchem.1c01045 |
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| Auteur | Rechercher : Li, Yuanjiao; Rechercher : Morel, Alban1; Rechercher : Gallant, Danick1; Rechercher : Mauzeroll, JanineIdentifiant ORCID : https://orcid.org/0000-0003-4752-7507 |
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| Affiliation | - Conseil national de recherches du Canada. Automobile et les transports de surface
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| Format | Texte, Article |
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| Sujet | electrochemistry; wires; liquids; electrodes; oxidation |
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| Résumé | Quantitative scanning micropipette contact method measurements are subject to the deleterious effects of reference electrode interference. The commonly used Ag/AgCl wire quasi-reference counter electrode in the miniaturized electrochemical cell of the scanning micropipette contact method was found to leak Ag⁺ into the electrolyte solution. The reduction of these Ag⁺ species at the working electrode surface generates a faradaic current, which significantly affects the low magnitude currents inherently measured in the scanning micropipette contact method. We demonstrate that, during the microscopic corrosion investigation of the AA7075-T73 alloy using the oil-immersed scanning micropipette contact method, the cathodic current was increased by the Ag⁺ reduction, resulting in positive shifts of corrosion potentials. The use of a leak-free Ag/AgCl electrode or an extended distance between the Ag/AgCl wire and micropipette tip droplet eliminated the Ag⁺ contamination, making it possible to measure accurate corrosion potentials during the oil-immersed scanning micropipette contact method measurements. |
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| Date de publication | 2021-07-08 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 72048e68-a3fd-4ad2-b4a0-d8b5e8908d06 |
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| Enregistrement créé | 2021-12-07 |
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| Enregistrement modifié | 2021-12-07 |
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