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dc.contributor.authorWilson, Håvard
dc.contributor.authorErbe, Andreas
dc.date.accessioned2019-08-30T09:03:14Z
dc.date.available2019-08-30T09:03:14Z
dc.date.created2019-08-28T21:41:30Z
dc.date.issued2019
dc.identifier.issn1388-2481
dc.identifier.urihttp://hdl.handle.net/11250/2611786
dc.description.abstractIllumination may increase corrosion rates of important engineering metals. In addition to the well-known photoelectrochemical mechanism which increases dissolution via generation of electron-hole pairs, induced convection via local heating can contribute to increased dissolution. Here, corrosion potential shifts of iron in HCl, aqueous NaCl and NaOH upon illumination with O(102 W cm−2) white light have been found to be O (10 mV), accompanied by increased corrosion rates. The increase in corrosion potential can be suppressed by stirring. These results are interpreted in the framework of the mixed potential theory. An increase in the diffusion limited current of the O2 reduction by increased O2 transport to the surface via induced convection leads to increased corrosion potentials, and thus increased corrosion rates. The induced convection mechanism of increased photocorrosion can be recognised by a delayed onset of corrosion potential shifts. In practice, this mechanism is anticipated to be important mainly in thin film electrolytes under strong illumination.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleConvection induced by illumination-based metal surface heating increases corrosion potential, corrosion ratesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.volume106nb_NO
dc.source.journalElectrochemistry communicationsnb_NO
dc.identifier.doi10.1016/j.elecom.2019.106513
dc.identifier.cristin1719666
dc.description.localcode© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).nb_NO
cristin.unitcode194,66,35,0
cristin.unitnameInstitutt for materialteknologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal