Banca de QUALIFICAÇÃO: PABLO RODRIGO PADILHA HONÓRIO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : PABLO RODRIGO PADILHA HONÓRIO
DATA : 04/07/2017
HORA: 14:00
LOCAL: Sala de aulas do PPGCEM
TÍTULO:

DEVELOPMENT OF MARKERS BY TRACES OF CHEMICAL ELEMENTS FOR IDENTIFICATION OF ELECTRICAL CABLES VIA X-RAY FLUORESCENCE.

PALAVRAS-CHAVES:

Chemical markers. Identification. XRF.

PÁGINAS: 55
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
RESUMO:

The present work has to as objective the study and development of markers for traces of chemical elements for the identification of electrical cables of aluminum and copper by means of analytical technique of spectroscopy by X-ray fluorescence (XRF) with use of the 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, markers were developed using a polyester-based varnish and an 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, whit the objective to check the remained of the Cr element used as marker, even after a possible recycling of cables. The results showed that the Cr₂O₃ particles are efficient for identifying the Cr element via laboratory FRX even with only 1% bulk addition on the surface of Al and Cu cables, 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. The remain capacity of Cr after the re-fusion of conductors containing markers with 10 % Cr₂O₃ and the detection limit of portable equipment need to be better evaluated in the project sequence. In spite of being efficient, Cr₂O₃ is not interesting for the application in question due to its green coloration. An alternative route would be to use Cr powdered metal in the manufacture of markers.

MEMBROS DA BANCA:
Presidente - 2156996 - AUGUSTO JOSE DE ALMEIDA BUSCHINELLI
Interno - 1883170 - MAURICIO ROBERTO BOMIO DELMONTE
Interno - 1938946 - NICOLAU APOENA CASTRO