Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1

Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1

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 Langmuir adsorption isotherm. The infusion extract which presented more phenolic compounds than the acid extract showed higher inhibition efficiency. The apparent activation energy (Ea) for the dissolution of C-steel slightly increased when the infusion extract was used.

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Main Authors: Torres,Vanessa V., Cabral,Gabriela Borges, Silva,Ana Carolina Gomes da, Ferreira,Kelly Cristina Ribeiro, D'Elia,Eliane
Format: Digital revista
Language:Portuguese
Published: Sociedade Brasileira de Química 2016
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000400423
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spelling oai:scielo:S0100-404220160004004232016-05-25Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1Torres,Vanessa V.Cabral,Gabriela BorgesSilva,Ana Carolina Gomes daFerreira,Kelly Cristina RibeiroD'Elia,Eliane carbon steel EIS polarization weight loss measurements acid inhibition 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 Langmuir adsorption isotherm. The infusion extract which presented more phenolic compounds than the acid extract showed higher inhibition efficiency. The apparent activation energy (Ea) for the dissolution of C-steel slightly increased when the infusion extract was used.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaQuímica Nova v.39 n.4 20162016-05-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000400423pt10.5935/0100-4042.20160046
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language Portuguese
format Digital
author Torres,Vanessa V.
Cabral,Gabriela Borges
Silva,Ana Carolina Gomes da
Ferreira,Kelly Cristina Ribeiro
D'Elia,Eliane
spellingShingle Torres,Vanessa V.
Cabral,Gabriela Borges
Silva,Ana Carolina Gomes da
Ferreira,Kelly Cristina Ribeiro
D'Elia,Eliane
Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1
author_facet Torres,Vanessa V.
Cabral,Gabriela Borges
Silva,Ana Carolina Gomes da
Ferreira,Kelly Cristina Ribeiro
D'Elia,Eliane
author_sort Torres,Vanessa V.
title Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1
title_short Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1
title_full Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1
title_fullStr Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1
title_full_unstemmed Ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em HCL 1 mol L-1
title_sort ação inibidora de extratos da semente do mamão papaia na corrosão do aço-carbono 1020 em hcl 1 mol l-1
description 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 Langmuir adsorption isotherm. The infusion extract which presented more phenolic compounds than the acid extract showed higher inhibition efficiency. The apparent activation energy (Ea) for the dissolution of C-steel slightly increased when the infusion extract was used.
publisher Sociedade Brasileira de Química
publishDate 2016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000400423
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