RT info:eu-repo/semantics/article
T1 Double barrel microelectrode assembly to prevent electrical field effects in potentiometric SECM imaging of galvanic corrosion processes
A1 Souto, Ricardo Manuel
A1 Filotás, Dániel
A1 Fernández Pérez, Bibiana María
A1 Kiss, András
A1 Nagy, Géza
A1 Nagy, Lívia
AB There is great interest in elucidating the corrosion mechanism of magnesium, and different experimental methods and techniquesare explored with this purpose. Among the scanning probe techniques, scanning electrochemical microscopy (SECM) is deliveringsome promising results in recent years. In particular, the use of ion selective microelectrodes (ISME) as SECM sensing probes allowmonitoring of the temporal and spatial distribution of different ionic species related to the corrosion reactions. However, a seriousdisturbance in the measured potential can be observed when it comes to galvanic coupling or polarization of the samples. This workexplores the factors that affect the magnitude of the electrical field effects associated with the galvanic coupling, and describes anexperimental arrangement for potentiometric SECM able to avoid the unwanted contribution of the potential field. The performanceof a double barrel electrode assembly comprising an ion selective microelectrode and an internal reference electrode was comparedto that of a conventional single barrel ISME in order to establish its applicability for the investigation of corrosion systems presentingelectrical field distributions.
YR 2018
FD 2018
LK http://riull.ull.es/xmlui/handle/915/18992
UL http://riull.ull.es/xmlui/handle/915/18992
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 17-nov-2024