Electrochemical behaviour of thermally sprayed Cr3C2-NiCr coatings in 0.5 M H2SO4 media

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSuegama, P. H.
dc.creatorFugivara, Cecilio Sadao
dc.creatorBenedetti, Assis Vicente
dc.creatorFernandez, J.
dc.creatorDelgado, J.
dc.creatorGuilemany, J. M.
dc.date2014-05-20T14:18:04Z
dc.date2016-10-25T17:40:20Z
dc.date2014-05-20T14:18:04Z
dc.date2016-10-25T17:40:20Z
dc.date2002-11-01
dc.date.accessioned2017-04-05T22:27:04Z
dc.date.available2017-04-05T22:27:04Z
dc.identifierJournal of Applied Electrochemistry. Dordrecht: Kluwer Academic Publ, v. 32, n. 11, p. 1287-1295, 2002.
dc.identifier0021-891X
dc.identifierhttp://hdl.handle.net/11449/25437
dc.identifierhttp://acervodigital.unesp.br/handle/11449/25437
dc.identifier10.1023/A:1021654628416
dc.identifierWOS:000179881800014
dc.identifierhttp://dx.doi.org/10.1023/A:1021654628416
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/870324
dc.descriptionThe electrochemical behaviour of coated Cr3C2-NiCr steel in aerated 0.5 M H2SO4 solution was studied by means of electrochemical a.c. and d.c. measurements. A complete structural characterization of the coated steel before and after electrochemical tests was also carried out to access the corrosion mechanism of coated steel, electrolyte penetration through the coating, and to confirm the results obtained using electrochemical techniques. Two types of Cr3C2-NiCr coatings produced by a high velocity oxy-fuel spraying system (HVOF) were studied. Differences between coated steels are related to the spraying parameters reflecting their behaviour against corrosion phenomena. The electrochemical behaviour of the coated steel was strongly influenced by porosity and the presence of microcracks in the coating. Once the electrolyte reaches the steel substrate, it corrodes in a galvanic manner resulting in coating detachment from the steel.
dc.languageeng
dc.publisherKluwer Academic Publ
dc.relationJournal of Applied Electrochemistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectcorrosion
dc.subjectCr3C2-NiCr coating
dc.subjectelectrochemical techniques
dc.subjectHVOF
dc.subjectsteel protection
dc.subjectthermal spraying
dc.titleElectrochemical behaviour of thermally sprayed Cr3C2-NiCr coatings in 0.5 M H2SO4 media
dc.typeOtro


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