RT info:eu-repo/semantics/article
T1 Imaging of concentration distributions and hydrogen evolution on corroding magnesium exposed to aqueous environments using scanning electrochemical microscopy
A1 Souto, Ricardo Manuel
A1 Izquierdo Pérez, Javier
A1 Fernández Pérez, Bibiana María
A1 Filotás, Dániel
A1 Őri, Zsuzsanna
A1 Kiss, András
A1 Martín-Gómez, Romen T.
A1 Nagy, Lívia
A1 Nagy, Géza
K1 Magnesium
K1 SECM
K1 hydrogen evolution
K1 pH gradients
K1 microelectrode probe
AB Scanning Electrochemical Microscopy (SECM) is presented as an essential tool for the local characterization of the still uncertain mechanism for magnesium corrosion. The reaction leading to magnesium release and hydrogen evolution from separated magnesium cathodes and anodes has been imaged using an adequate combination of the operation modes available in SECM. Magnesium ion selective microelectrodes (Mg-ISME’s) were used for the visualization of the heterogeneously distributed release of magnesium (II) species. Antimony microelectrodes detected the pH gradients in the adjacent electrolyte resulting from either water or magnesium electrolysis, whereas platinum microdiscs were used to monitor the concomitant local evolution of hydrogen. Alkalization and H2 generation were observed over the magnesium strip polarized as cathode, whereas a small local acidification was observed above the strip polarized anodically, at which extensive heterogeneous magnesium release was also imaged
YR 2016
FD 2016
LK http://riull.ull.es/xmlui/handle/915/19032
UL http://riull.ull.es/xmlui/handle/915/19032
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 22-nov-2024