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In situ monitoring of pit nucleation and growth at iron passive oxide layer using combined atomic force and scanning electrochemical microscopy
dc.contributor.author | Souto, Ricardo Manuel | |
dc.contributor.author | Izquierdo Pérez, Javier | |
dc.contributor.author | Eifert, Alexander | |
dc.contributor.author | Kranz, Christine | |
dc.date.accessioned | 2020-03-25T19:05:18Z | |
dc.date.available | 2020-03-25T19:05:18Z | |
dc.date.issued | 2015 | es_ES |
dc.identifier.uri | http://riull.ull.es/xmlui/handle/915/19071 | |
dc.description.abstract | Generation of single corrosion pits and in situ monitoring of pit growth on iron exposed to 0.5 M NaCl solution was achieved using combined atomic force - scanning electrochemical microscopy (AFM-SECM). Pits as small as 2.7 μm in diameter were formed at arbitrary locations on the substrate by local generation of highly concentrated nitric acid in the vicinity of the AFM-SECM probe. Addition of nitrite ions to the environment, which act as corrosion inhibitors for iron, ensures passivation of the metal, and hinders metal corrosion despite exposure to the chloride-containing media. Localized acidification was achieved by oxidizing nitrite ions at the probe. Acidification in combination with the high chloride content in the solution leads to a local rapid attack at the surface and pit generation below the AFM-SECM probe. Besides improved spatial resolution and precise control of the pit nucleation site, combined AFM-SECM allows simultaneous imaging of the generated pits by the AFM tip. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | es_ES |
dc.relation.ispartofseries | ChemElectroChem, 2 (11), 1847-1856 (2015) | es_ES |
dc.rights | Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 Internacional) | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es_ES | |
dc.title | In situ monitoring of pit nucleation and growth at iron passive oxide layer using combined atomic force and scanning electrochemical microscopy | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1002/celc.201500100 | |
dc.subject.keyword | localized corrosion | en |
dc.subject.keyword | single pit nucleation | en |
dc.subject.keyword | iron | en |
dc.subject.keyword | combined AFM–SECM | en |
dc.subject.keyword | imaging | en |