Non-Destructive Electrochemical Testing for Stainless-Steel Components with Complex Geometry Using Innovative Gel Electrolytes

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dc.contributor.author Monrrabal Márquez, Gleidys
dc.contributor.author Ramirez Barat, Blanca
dc.contributor.author Bautista Arija, María Asunción
dc.contributor.author Velasco López, Francisco Javier
dc.contributor.author Cano, Emilio
dc.date.accessioned 2019-02-11T09:09:14Z
dc.date.available 2019-02-11T09:09:14Z
dc.date.issued 2018-06-29
dc.identifier.bibliographicCitation Monrrabal, G., Ramírez-Barat, B., Bautista, A., Velasco, F., Cano, E. (2018). Non-Destructive Electrochemical Testing for Stainless-Steel Components with Complex Geometry Using Innovative Gel Electrolytes. Metals, 8 (7), 500
dc.identifier.issn 2075-4701
dc.identifier.uri http://hdl.handle.net/10016/28037
dc.description.abstract Corrosion can be a problem for stainless steels in chloride-containing or other aggressive environments, especially when they are formed as components with complex shapes. Monitoring the corrosion performance of the stainless steels during their in-service life is not always an easy task. Traditional electrochemical cells can be difficult to adapt to complex surfaces, and undesired crevices or liquid electrolyte leaks can occur. In the presented work, the possible use of non-destructive techniques with innovative gel electrolytes was investigated using portable cells. The electrolytes were based on agar (used as a gelling agent with ionic conductivity), glycerol (a plasticizer that improves adaptability to complex surfaces), and NaCl or KClO4 salts (which improve the conductivity and control the aggression of the tests). X-ray photoelectron spectroscopy (XPS) and Mott&-Schottky analysis were carried out to obtain information about the influence of the electrolyte on the passive layer. The oxygen concentration and conductivity in the gels with various glycerol contents were compared to those in liquid electrolytes. Electrochemical impedance spectroscopy (EIS) measurements were carried out in liquids and gels. The performance of the gel cell on a stainless-steel component with a weld and complex shape was checked. The variation in the sensitivity of gels with and without chlorides to identify corrosion-susceptible regions was tested.
dc.description.sponsorship This research was funded by the Spanish Ministry of Economy (MINECO) project grant numbers TRA2014-56471-C4-2-R and HAR2014-54893-R (CREMEL II)), and Interreg SUDOE (project grant number SOE1/P1/E0307 (KrEaTive Habitat)).
dc.format.extent 18
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher MDPI
dc.rights © 2018 by the authors; licensee MDPI, Basel, Switzerland.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Stainless steel
dc.subject.other Corrosion monitoring
dc.subject.other Agar gel
dc.subject.other Welding
dc.subject.other Crevice corrosion
dc.subject.other Passive films
dc.subject.other EIS
dc.subject.other XPS
dc.subject.other Mott-Schottky
dc.title Non-Destructive Electrochemical Testing for Stainless-Steel Components with Complex Geometry Using Innovative Gel Electrolytes
dc.type article
dc.subject.eciencia Materiales
dc.identifier.doi https://doi.org/10.3390/met8070500
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. TRA2014-56471-C4-2-R
dc.relation.projectID Gobierno de España. HAR2014-54893-R
dc.type.version publishedVersion
dc.identifier.publicationissue 7
dc.identifier.publicationtitle Metals
dc.identifier.publicationvolume 9
dc.identifier.uxxi AR/0000022417
dc.contributor.funder Ministerio de Economía, Industria y Competitividad (España)
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