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Previous issue date: 2017-10-24 / O presente trabalho tem como objetivo o estudo e desenvolvimento de marcadores por tra?os de elementos qu?micos para identifica??o de cabos el?tricos de alum?nio e de cobre por meio da t?cnica anal?tica de espectroscopia por fluoresc?ncia de raios-X (FRX) com uso de equipamento port?til. O desenvolvimento dos marcadores qu?micos tem como prop?sito tentar solucionar ou minimizar o crescente problema de furtos de cabos el?tricos no pa?s, o qual tem causado enormes preju?zos e transtornos para empresas e popula??o. Neste sentido, foram desenvolvidos marcadores utilizando um verniz de base poli?ster e uma resina ep?xi de cor preta, os quais foram dopados com part?culas de Cr2O3. Os marcadores foram produzidos com adi??es de 1, 2, 5 e 10% do peso em massa de Cr2O3 nas resinas polim?ricas e foram aplicados em cabos de alum?nio nus e de cobre revestidos. Ap?s a aplica??o dos marcadores, os cabos foram analisados via FRX, em seguida fundidos, e novamente analisados via FRX para verificar a perman?ncia do elemento marcador, mesmo ap?s uma poss?vel reciclagem dos cabos. Os resultados mostraram que os marcadores qu?micos s?o eficientes para identifica??o do Cr via FRX de laborat?rio, mesmo com apenas 1% de adi??o de Cr2O3 na superf?cie de cabos de Al e Cu, com os dois tipos de resinas, contudo, n?o ? suficiente para identifica??o ap?s a refus?o dos condutores. Os marcadores contendo 2 e 5% de Cr2O3 mostraram-se pouco eficientes na identifica??o do Cr ap?s refus?o. Apenas os marcadores confeccionados com resina poli?ster contendo 10% de Cr2O3 se mostraram eficientes ap?s a refus?o do Al sendo identificados em todos os corpos de prova analisados. / The present work has as objective the study and development of markers based on traces of chemical elements for the identification of electrical cables of aluminum and copper by means of a X-ray fluorescence (XRF) portable equipment. The development of chemical markers has as purpose try to solve or minimize the problem of theft of electric cables in the country, which has caused huge losses and disorders for companies and population. In this sense, the markers were developed using a polyester-based varnish and a black epoxy resin, which were doped with Cr2O3 particles. The markers were produced with additions of 1, 2, 5 and 10% of bulk weight of Cr2O3 in polymer resins and they were applied on cables of bare aluminum and isolated copper. After the markers were applied, the cables were analyzed via XRF, then fused, and again analyzed by XRF to check the permanence of the marker element, even after a possible recycling of the cables. The results showed that the chemical markers are efficient for identifying the Cr element via laboratory FRX even with only 1% bulk addition of Cr2O3 on the surface of Al and Cu cables, with both types of resins, however, it is not sufficient for identification after re-fusion of the conductors. The markers containing 2 and 5% of Cr2O3 showed little efficiency in the identification of Cr after re-fusion. Only the markers made with polyester resin containing 10% of Cr2O3 proved to be efficient after the Al re-fusion and were identified in all analyzed samples.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24728 |
| Date | 24 October 2017 |
| Creators | Hon?rio, Pablo Rodrigo Padilha |
| Contributors | 30399564853, Louren?o, Jorge Magner, 65515404491, Castro, Nicolau Apoena, 27783773877, Buschinelli, Augusto Jos? de Almeida |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE MATERIAIS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Unknown |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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