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Optimization of espresso spent ground coffee waste extract preparation and the influence of its chemical composition as an eco-friendly corrosion inhibitor for carbon steel in acid medium

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dc.contributor.author Costa, Marina A. J. L. da
dc.contributor.author Gois, Jefferson S. de
dc.contributor.author Toaldo, Isabela M.
dc.contributor.author Bauerfeldt, Ana Clara Favilla
dc.contributor.author Batista, Diego B.
dc.contributor.author Bordignon-Luiz, Marilde T.
dc.contributor.author Lago, Dalva C. B. do
dc.contributor.author Luna, Aderval S.
dc.contributor.author Senna, Lilian F. de
dc.date.accessioned 2022-07-13T20:13:57Z
dc.date.available 2022-07-13T20:13:57Z
dc.date.issued 2020
dc.identifier.citation COSTA, M. A. J. L. et al. Optimization of espresso spent ground coffee waste extract preparation and the influence of its chemical composition as an eco-friendly corrosion inhibitor for carbon steel in acid medium. Materials Research, São Carlos, v. 23, n. 5, p. 1-12, 2020. pt_BR
dc.identifier.issn 1980-5373
dc.identifier.uri https://doi.org/10.1590/1980-5373-MR-2019-0591 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/13582
dc.description.abstract This work proposes the reuse of spent ground coffee waste (SCG) extracts as eco-friendly corrosion inhibitors for carbon steel in acid medium, and the correlation between their anticorrosive efficiency and chemical composition. The extraction method was optimized using a central composite design, and the chemical composition of the extracts was accessed using UV-Vis spectrometry, HPLC, and ICP-OES. EIS and Potentiodynamic Polarization (PP) tests evaluated the anticorrosive properties of the extracts. Total phenol content ranged from 93 mg L-1 to 219 mg L-1 Gallic Acid Equivalent. The highest concentration of phenolic compounds was observed for syringic acid (78.67 mg L-1), while the lowest concentration was verified for (-)-epigallocatechin-3-O-gallate (0.01 mg L-1). The Pearson correlation coefficient showed no correlation between the Rct and the total phenol content, although, positive correlations with the Rct was observed for caffeic acid, (+)-catechin, ferulic acid, and protocatechuic acid. EIS analysis revealed that all of the extracts could act as corrosion inhibitors. The best performance was verified for C3 extract (IE % = 94.83%). PP tests showed that this extract acted as a mixed inhibitor, with a predominant cathodic effect. Therefore, the valorization of the extracts as corrosion inhibitors was successfully achieved. pt_BR
dc.format pdf pt_BR
dc.language.iso en pt_BR
dc.publisher ABM, ABC, ABPol pt_BR
dc.relation.ispartofseries Materials Research;v.23, n.5, 2020
dc.rights Open Access pt_BR
dc.subject Spent ground coffee pt_BR
dc.subject Chemical characterization of food pt_BR
dc.subject Waste management pt_BR
dc.subject Pearson correlation pt_BR
dc.subject Green chemistry pt_BR
dc.subject Corrosion inhibitor pt_BR
dc.subject.classification Cafeicultura::Resíduos e subprodutos do café pt_BR
dc.title Optimization of espresso spent ground coffee waste extract preparation and the influence of its chemical composition as an eco-friendly corrosion inhibitor for carbon steel in acid medium pt_BR
dc.type Artigo pt_BR

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