Determination of Fe(III) using digital images: Study of corrosion in steel plates using a polyester laser printed device

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dc.contributor.authorFilho, Juliano Passaretti [UNESP]
dc.contributor.authorGomes Valente Junior, Marco Antônio [UNESP]
dc.contributor.authorDe Lima Gomes, Paulo Clairmont F. [UNESP]
dc.contributor.authorFugivara, Cecílio Sadao [UNESP]
dc.contributor.authorCardoso, Arnaldo Alves [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:31:17Z
dc.date.available2018-12-11T17:31:17Z
dc.date.issued2017-01-28
dc.description.abstractThe marketing of metals and metal alloys requires strategies for controlling the integrity of these materials. Corrosion of iron alloys results in the formation of oxides on the metal surface and can be quantified in units of mass loss of the metal. In this article, a method was developed for determining the mass of iron oxide formed on the surface of metal using a polyester laser printed spot device. The technique involves the oxidation of Fe(ii) to Fe(iii) and a subsequent reaction of Fe3+ with SCN- to form a colored species. This reaction, which is widely used in chemical methods, employs reagents that are readily available and inexpensive. A template with 90 spots of diameter 3.4 mm was printed on a transparency sheet using a commercial laser printer. Each spot was impregnated with 4 μL of 0.190 mol L-1 ammonium thiocyanate solution. The reaction of Fe3+ with SCN- resulted in a product that absorbed in the visible region. Detection of the colored spots formed was performed automatically by acquisition of images with a scanner and a cell phone. The method developed was applied to the determination of corrosion rates in samples subjected to controlled corrosion processes. For comparison purposes, the corrosion was also determined by the gravimetric standard method. No significant differences between the results of both methods were observed, showing good performance with respect to the ASTM conventional reference method. The method developed offers advantages for routine analyses, with several spots that can be analyzed simultaneously and only a few units of μL of sample were required. Other advantages inherent in the method are drastic reduction in the use of reagents and the analytical cost, as well as waste generation.en
dc.description.affiliationSão Paulo State University Department of Analytical Chemistry UNESP CEP 14800-970
dc.description.affiliationUnespSão Paulo State University Department of Analytical Chemistry UNESP CEP 14800-970
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 2015/23265-5
dc.description.sponsorshipIdFAPESP: 2016/03369-3
dc.description.sponsorshipIdCAPES: 33004030072p8
dc.format.extent655-663
dc.identifierhttp://dx.doi.org/10.1039/c6ay02590k
dc.identifier.citationAnalytical Methods, v. 9, n. 4, p. 655-663, 2017.
dc.identifier.doi10.1039/c6ay02590k
dc.identifier.issn1759-9679
dc.identifier.issn1759-9660
dc.identifier.lattes0049857977635051
dc.identifier.orcid0000-0002-4837-6352
dc.identifier.scopus2-s2.0-85010876635
dc.identifier.urihttp://hdl.handle.net/11449/178608
dc.language.isoeng
dc.relation.ispartofAnalytical Methods
dc.relation.ispartofsjr0,619
dc.relation.ispartofsjr0,619
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleDetermination of Fe(III) using digital images: Study of corrosion in steel plates using a polyester laser printed deviceen
dc.typeArtigo
unesp.author.lattes0049857977635051[3]
unesp.author.lattes9165109840414837[5]
unesp.author.lattes2797127887030838[4]
unesp.author.orcid0000-0002-4837-6352[3]
unesp.author.orcid0000-0003-2046-995X[5]
unesp.author.orcid0000-0002-2288-2601[4]

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Artigos - Físico Química - IQ
Artigos - Química Analítica - IQ