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| Registros recuperados : 19 | |
| 10. |  | PINTO, O. C. B.; YAHNER, J. E.; ROTH, C. B. Natureza e formação de caolinita em forma de pseudomica, em solos de Viçosa, Minas Gerais. Experientiae, Viçosa, MG, v. 13, n. 12, p. 383-421, jun. 1972. il.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 14. | | DERPSCH, R.; ROTH, C. H.; SIDIRAS, N.; KOPKE, U.; KRAUSE, R.; BLANKEN, J. Controle da erosão no Paraná, Brasil: sistemas de cobertura do solo, plantio direto e preparo conservacionista do solo. Eschborn: GTZ, 1991. 272 p. Traduzido por Irene Popper, Ademir Galegari.| Biblioteca(s): Embrapa Agropecuária Oeste; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Hortaliças; Embrapa Semiárido. |
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| 15. | | DERPSCH, R.; ROTH, C. H.; SIDRAS, N.; KOPKE, U.; KRAUSE, R.; BLANKEN, J. Controle da erosao no Parana, Brasil: sistemas de cobertura do solo, plantio direto e preparo conservacionista do solo. Eschborn: Deutsche Gesellschaft fur Technische Zusammenarbeit(GTZ)/GmbH, 1991. 268p. il. (Sonderpublikation der GTZ, 245).| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 19. | | SILVA, P. F. da; RIBEIRO, T. S.; GOMES, B. F.; SILVA, G. T. S. T. da; LOBO, C. M. S.; CARMO, M.; OLIVEIRA, C. R. de; BERNARDES FILHO, R.; ROTH, C.; COLNAGO, L. A. Miniaturized carbon fiber paper electrodes for In situ high resolution NMR analyses. Analalytical Chemistry, v. 94, 2022. 15223–15230| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 19 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
04/04/2022 |
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Data da última atualização: |
23/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MITRE, C. I. N.; PARIS, E. C.; LOBO, C. M. S.; ROTH, C.; COLNAGO, L. A. |
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Afiliação: |
ELAINE CRISTINA PARIS, CNPDIA; LUIZ ALBERTO COLNAGO, CNPDIA. |
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Título: |
Use of time domain nuclear magnetic resonance relaxometry to monitor the rffect of magnetic field on the copper corrosion rate in real time. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Magneto Chemistry, v. 8, 40, 2022. |
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Páginas: |
11 p. |
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ISSN: |
2312-7481 |
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DOI: |
10.3390/magnetochemistry800040 |
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Idioma: |
Inglês |
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Conteúdo: |
The corrosion of metals is a major problem of modern societies, demanding new technologies and studies to understand and minimize it. Here we evaluated the effect of a magnetic field (B) on the corrosion of copper in aqueous HCl solution under open circuit potential. The corrosion product, Cu2+, is a paramagnetic ion and its concentration in the solution was determined in real time in the corrosion cell by time-domain NMR relaxometry. The results show that the magnetic field (B = 0.23 T) of the time-domain NMR instrument reduces the corrosion rate by almost 50%, in comparison to when the corrosion reaction is performed in the absence of B. Atomic force microscopy and X-ray diffraction results of the analysis of the corroded surfaces reveal a detect-able CuCl phase and an altered morphology when B is present. The protective effect of B was explained by magnetic forces that maintain the Cu2+ in the solution/metal interface for a longer time, hindering the arrival of the new corrosive agents, and leading to the formation of a CuCl phase, which may contribute to the rougher surface. The time-domain NMR method proved to be useful to study the effect of B in the corrosion of other metals or other corrosive liquid media when the reactions produce or consume paramagnetic ions. |
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Palavras-Chave: |
Copper corrosion; Magnetocorrosion; Time-domain NMR relaxometry. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1141768/1/P-Use-of-time-domain-nuclear-magnetic-resonance-relaxometry-....pdf
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Marc: |
LEADER 02038naa a2200241 a 4500
001 2141768
005 2024-01-23
008 2022 bl uuuu u00u1 u #d
022 $a2312-7481
024 7 $a10.3390/magnetochemistry800040$2DOI
100 1 $aMITRE, C. I. N.
245 $aUse of time domain nuclear magnetic resonance relaxometry to monitor the rffect of magnetic field on the copper corrosion rate in real time.$h[electronic resource]
260 $c2022
300 $a11 p.
520 $aThe corrosion of metals is a major problem of modern societies, demanding new technologies and studies to understand and minimize it. Here we evaluated the effect of a magnetic field (B) on the corrosion of copper in aqueous HCl solution under open circuit potential. The corrosion product, Cu2+, is a paramagnetic ion and its concentration in the solution was determined in real time in the corrosion cell by time-domain NMR relaxometry. The results show that the magnetic field (B = 0.23 T) of the time-domain NMR instrument reduces the corrosion rate by almost 50%, in comparison to when the corrosion reaction is performed in the absence of B. Atomic force microscopy and X-ray diffraction results of the analysis of the corroded surfaces reveal a detect-able CuCl phase and an altered morphology when B is present. The protective effect of B was explained by magnetic forces that maintain the Cu2+ in the solution/metal interface for a longer time, hindering the arrival of the new corrosive agents, and leading to the formation of a CuCl phase, which may contribute to the rougher surface. The time-domain NMR method proved to be useful to study the effect of B in the corrosion of other metals or other corrosive liquid media when the reactions produce or consume paramagnetic ions.
653 $aCopper corrosion
653 $aMagnetocorrosion
653 $aTime-domain NMR relaxometry
700 1 $aPARIS, E. C.
700 1 $aLOBO, C. M. S.
700 1 $aROTH, C.
700 1 $aCOLNAGO, L. A.
773 $tMagneto Chemistry$gv. 8, 40, 2022.
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