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A new experimental technique for quantifying the galvanic coupling effects on stainless steel during tribocorrosion under equilibrium conditions

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A new experimental technique for quantifying the galvanic coupling effects on stainless steel during tribocorrosion under equilibrium conditions

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dc.contributor.author Espallargas Álvarez, Nuria es_ES
dc.contributor.author Johnsen, R. es_ES
dc.contributor.author Torres, Cristian es_ES
dc.contributor.author Igual Muñoz, Anna Neus
dc.date.accessioned 2015-05-12T09:46:07Z
dc.date.available 2015-05-12T09:46:07Z
dc.date.issued 2013-09-30
dc.identifier.issn 0043-1648
dc.identifier.uri http://hdl.handle.net/10251/50093
dc.description.abstract Galvanic coupling during tribocorrosion of passive metals at open circuit potential (OCP) generates a wear-accelerated corrosion process within the depassivated area (worn surface) that is electrically in contact with the still passive one. The galvanic coupling effect at OCP was recently modeled using an electrochemical approach allowing for the theoretical quantification of the wear-accelerated corrosion under equilibrium conditions. Despite the usefulness of this model that mathematically determines the electrochemical conditions inside the wear track in terms of anode potential via the approximation of the net anodic current density, an experimental technique allowing for their experimental determination is essential in the effort to verify the galvanic coupling models and further understand the tribocorrosion mechanisms at OCP. In the present work, a new experimental technique based on galvanic current and potential measurements through a Zero-Resistance Ammeter (ZRA) for quantifying the electrode potential and anodic current inside the wear track during rubbing at OCP has been assessed. This experimental set-up has allowed for the first time to determine the prevailing electrochemical conditions (electrode potential and anodic current) inside the wear track by solely exposing the wear track to the electrolyte and physically separating the cathode from the anode (wear track). The effects of sliding wear at open circuit potential have been investigated for a super duplex stainless steel (UNS S32750) in 3.4 wt% NaCl. The new experimental set-up proposed in this work separates the cathode from the anode and exposes solely the wear track to the electrolyte. Using well-established electrochemical theories, the effect of the extent of the galvanic coupling on wear at the open circuit potential conditions has been quantified. es_ES
dc.description.sponsorship The authors would like to thank the support from the European Union for funding C. Torres through the Leonardo da Vinci Mobility program. C.B. von der Ohe and E. Jensen are also acknowledged for having taken part in the initial phase 1151 of this long project. Dr. N. Papageorgiou (NTNU) is also acknowledged for the input and calculations in the modeling part and for preparing Figs. 6-9 of the paper. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation European Union for funding C. Torres through the Leonardo da Vinci Mobility program es_ES
dc.relation.ispartof Wear es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Tribocorrosion es_ES
dc.subject Galvanic coupling es_ES
dc.subject Wear-accelerated corrosion es_ES
dc.subject Zero-Resistance Ammeter (ZRA) es_ES
dc.subject.classification INGENIERIA QUIMICA es_ES
dc.title A new experimental technique for quantifying the galvanic coupling effects on stainless steel during tribocorrosion under equilibrium conditions es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.wear.2013.08.026
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear es_ES
dc.description.bibliographicCitation Espallargas Álvarez, N.; Johnsen, R.; Torres, C.; Igual Muñoz, AN. (2013). A new experimental technique for quantifying the galvanic coupling effects on stainless steel during tribocorrosion under equilibrium conditions. Wear. 307(1-2):190-197. doi:10.1016/j.wear.2013.08.026 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.wear.2013.08.026 es_ES
dc.description.upvformatpinicio 190 es_ES
dc.description.upvformatpfin 197 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 307 es_ES
dc.description.issue 1-2 es_ES
dc.relation.senia 256224
dc.identifier.eissn 1873-2577


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