Data/hora: 30/05/2024 02:35:42

Biblioteca(s): 	Embrapa Instrumentação.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 1	
Data corrente: 	04/04/2022	
Data da última atualização: 	23/01/2024	
Autoria: 	MITRE, C. I. N.; PARIS, E. C.; LOBO, C. M. S.; ROTH, C.; COLNAGO, L. A.	
Afiliação: 	ELAINE CRISTINA PARIS, CNPDIA; LUIZ ALBERTO COLNAGO, CNPDIA.	
Título: 	Use of time domain nuclear magnetic resonance relaxometry to monitor the rffect of magnetic field on the copper corrosion rate in real time.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Magneto Chemistry, v. 8, 40, 2022.	
Páginas: 	11 p.	
ISSN: 	2312-7481	
DOI: 	10.3390/magnetochemistry800040	
Idioma: 	Inglês	
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.	
Palavras-Chave: 	Copper corrosion; Magnetocorrosion; Time-domain NMR relaxometry.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1141768/1/P-Use-of-time-domain-nuclear-magnetic-resonance-relaxometry-....pdf	
Registro original: 	Embrapa Instrumentação (CNPDIA)	
Exemplares: 	CNPDIA - (17977-1) - UPC - AP - DD - PROCI.22/38 -  - 2022/40 - DIS