Use of time domain nuclear magnetic resonance relaxometry to monitor the rffect of magnetic field on the copper corrosion rate in real time
| Autor: | MITRE, C. I. N., PARIS, E. C., LOBO, C. M. S., ROTH, C., COLNAGO, L. A. |
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| Přispěvatelé: | ELAINE CRISTINA PARIS, CNPDIA, LUIZ ALBERTO COLNAGO, CNPDIA. |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| Popis: | 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. Made available in DSpace on 2022-04-13T11:00:52Z (GMT). No. of bitstreams: 1 P-Use-of-time-domain-nuclear-magnetic-resonance-relaxometry-....pdf: 3768079 bytes, checksum: 52633929db1223533e08d7dc395068ac (MD5) Previous issue date: 2022 |
| Databáze: | OpenAIRE |
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