Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution

Published on Jan 1, 2019in Materials Research-ibero-american Journal of Materials1.524
· DOI :10.1590/1980-5373-MR-2018-0839
Samantha Alcântara Fernandes Ramos1
Estimated H-index: 1
(UERJ: Rio de Janeiro State University),
Lilian Ferreira de Senna16
Estimated H-index: 16
(UERJ: Rio de Janeiro State University),
Dalva Cristina Baptista do Lago9
Estimated H-index: 9
(UERJ: Rio de Janeiro State University)
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Abstract
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2008
1 Author (T. Umamathi)
References20
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A quantidade de residuos gerados durante o beneficiamento do cafe no Brasil (principalmente casca) representa aproximadamente 50% da producao. Visando diminuir este problema, o objetivo deste trabalho foi obter diferentes extratos das cascas de cafe, avaliar sua composicao e atividade antimicrobiana. Utilizando extracoes por Soxhlet, com solventes de diferentes polaridades e seletividades e analisando estes extratos por Cromatografia Gasosa acoplada a Espectrometria de Massas e Espectroscopia de...
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The behavior of roasted coffee extract and its isolated high molecular weight fraction have been investigated as carbon steel corrosion inhibitors in HCl solution by weight loss measurements, potentiodynamic polarization curves, electrochemical impedance and scanning electron microscopy analysis. All results showed that the high molecular weight fraction, rich in melanoidins, present an important role in the inhibitory action of the roasted coffee extract in the acid corrosion of carbon steel.
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#1Vanessa Vasconcelos Torres (UFRJ: Federal University of Rio de Janeiro)H-Index: 3
Last. Eliane D'Elia (UFRJ: Federal University of Rio de Janeiro)H-Index: 18
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The effect of two papaya seed extracts (infusion and acid extracts) on the corrosion of carbon steel in 1 mol L-1 HCl was examined. The efficiency for inhibiting the corrosion of C-steel in 1 mol L-1 HCl increased with the extract concentration and decreased slightly with the temperature. The inhibitory property of the extract is discussed in terms of the mechanism by which its components adsorb onto the C-steel surface decreasing the active surface area. This adsorption process obeyed a Langmui...
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#1Viviane M. Teixeira (UFRJ: Federal University of Rio de Janeiro)H-Index: 1
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Last. Eliane D'Elia (UFRJ: Federal University of Rio de Janeiro)H-Index: 18
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O efeito do extrato da Camellia sinensis na corrosao do aco-carbono em HCl 1 mol L -1 foi investigado. As curvas de polarizacao mostram que este extrato age como inibidor misto com caracteristica predominantemente catodica. A eficiencia de inibicao obtida a partir das curvas de polarizacao e da tecnica de impedância eletroquimica aumentou com a concentracao do extrato, chegando a 89 % na presenca de 1500 ppm do extrato. A energia de ativacao aparente para a dissolucao do aco-carbono aumentou lig...
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Abstract The alcoholic extracts of eight plants namely Lycium shawii , Teucrium oliverianum , Ochradenus baccatus , Anvillea garcinii , Cassia italica , Artemisia sieberi , Carthamus tinctorius , and Tripleurospermum auriculatum grown in Saudi Arabia were studied for their corrosion inhibitive effect on mild steel in 0.5 M HCl media using the open circuit potential (OCP), Tafel plots and A.C. impedance methods. All the plant extracts inhibited the corrosion of mild steel in acidic media through ...
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#1Débora Cristiane Bassani (Centro Universitário das Faculdades Metropolitanas Unidas)H-Index: 2
Last. Daniel GranatoH-Index: 61
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This study focused on maximizing the extraction of total phenolics and flavonoids as well as the antioxidant activity measured by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay from roasted yerba mate (Ilex paraguariensis) as a function of time (5, 7.5 and 10 min) and temperature of extraction (60, 75 and 90°C). The data were subjected to Response Surface Methodology and the results showed that polynomial equations were significant, did not present lack of fit, and presented adjusted determinati...
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#1Maria Beatriz Mesquita Cansanção Felipe (UFRN: Federal University of Rio Grande do Norte)H-Index: 5
#2Maria Aparecida Medeiros Maciel (UFRN: Federal University of Rio Grande do Norte)H-Index: 21
Last. Djalma Ribeiro da Silva (UFRN: Federal University of Rio Grande do Norte)H-Index: 20
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A corrosao constitui um processo natural que pode ser facilmente encontrado em diferentes tipos de superficies e representa uma das principais causas de perdas economicas no setor industrial. Atualmente, o controle da corrosao metalica tem fundamental importância economica, tecnica e ambiental. Geralmente os processos reacionais que desencadeiam a corrosao sao espontâneos, de carater quimico, eletroquimico ou eletrolitico e tendem a modificar as caracteristicas fisico-quimicas dos materiais. Inc...
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#1Anees A. Khadom (University of Diyala)H-Index: 23
Last. Nabaa B. Ali (University of Diyala)
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Abstract null null The corrosion prevention mechanism of steel by apricot juice as green chemicals was better understood using molecular dynamics and quantum chemistry simulations. Furthermore, mathematical and statistical analysis were a powerful tool for building a relationship between inhibitor performance and independent variables. Eighteen main compounds of apricot juice were investigated using quantum chemical calculations. HOMO energy, LUMO energy, energy gap, chemical hardness, electroph...
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