AL BACHA, Serge; FARIAS, Eliana Desireé; GARRIGUE, Philippe; ZAKHOUR, Mirvat; NAKHL, Michel; BOBET, Jean-Louis; ZIGAH, Dodzi

doi:10.1016/j.jallcom.2021.162560

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AL BACHA, Serge
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
Institut Lavoisier de Versailles [ILV]
الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth] [LU / ULB]

FARIAS, Eliana Desireé
Institut des Sciences Moléculaires [ISM]

GARRIGUE, Philippe
Institut des Sciences Moléculaires [ISM]

Langue

Article de revue

Ce document a été publié dans

Journal of Alloys and Compounds. 2022, vol. 895, p. 162560

Elsevier

Résumé en anglais

The effect of galvanic coupling on the corrosion behavior of Mg and Mg17Al12 in Mg-Al alloys was studied by Scanning ElectroChemical Microscopy (SECM). The effect of galvanic coupling between Mg and Mg17Al12 was investigated using a “model” Mg+Mg17Al12 material with a controlled microstructure to evaluate the hydrogen evolution at a micrometric scale. SECM maps revealed that galvanic coupling between Mg and Mg17Al12 accelerates the corrosion rate (formation of a thicker passive layer) of both components. Mg17Al12 acts controversially to a conventional cathode in galvanic system since hydrogen production by its hydrolysis reaction was found to increase due to the electron transfer with the anode (Mg).< Réduire

Mots clés en anglais

SECM

Galvanic coupling

Corrosion

Mg17Al12

Hydrogen production

DOI

http://dx.doi.org/10.1016/j.jallcom.2021.162560

Project ANR

Advanced Materials by Design - ANR-10-LABX-0042
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026