Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media

Mild steel corrosion is responsible for economic and industrial losses due to accelerated deterioration. Synthesized derivatives of thiourea and phenolic aldehydes containing heteroatoms are capable of inhibiting corrosion by adsorption onto the steel through formation of strong bonds. Thus, the ele...

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Autores:
Loto, Roland
Tipo de recurso:
Article of journal
Fecha de publicación:
2017
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/66271
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/66271
http://bdigital.unal.edu.co/67295/
Palabra clave:
54 Química y ciencias afines / Chemistry
Corrosion
adsorción
corrosión
acero dulce
inhibidor
ácido clorhídrico
ácido sulfúrico
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_c8bd5b0f2a19c754d75418ca09159d35
oai_identifier_str oai:repositorio.unal.edu.co:unal/66271
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
title Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
spellingShingle Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
54 Química y ciencias afines / Chemistry
Corrosion
adsorción
corrosión
acero dulce
inhibidor
ácido clorhídrico
ácido sulfúrico
title_short Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
title_full Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
title_fullStr Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
title_full_unstemmed Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
title_sort Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media
dc.creator.fl_str_mv Loto, Roland
dc.contributor.author.spa.fl_str_mv Loto, Roland
dc.subject.ddc.spa.fl_str_mv 54 Química y ciencias afines / Chemistry
topic 54 Química y ciencias afines / Chemistry
Corrosion
adsorción
corrosión
acero dulce
inhibidor
ácido clorhídrico
ácido sulfúrico
dc.subject.proposal.spa.fl_str_mv Corrosion
adsorción
corrosión
acero dulce
inhibidor
ácido clorhídrico
ácido sulfúrico
description Mild steel corrosion is responsible for economic and industrial losses due to accelerated deterioration. Synthesized derivatives of thiourea and phenolic aldehydes containing heteroatoms are capable of inhibiting corrosion by adsorption onto the steel through formation of strong bonds. Thus, the electrochemical corrosion inhibition properties of the combined admixture of 1,3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in 1 M H2SO4 andHCl acid media were studied through weight loss analysis, potentiodynamic polarization method, optical microscopy and IR spectroscopy. Results showed that the organic mixture effectively inhibited the corrosion of mild steel in both solutions with an optimal inhibition efficiency of 97.4% and 97.47% in H2SO4 from weight loss and potentiodynamic polarization test, while the corresponding values in HCl were 94.71% and 89.73% respectively. Thermodynamic calculations showed that the compound chemisorbed onto the steel surface blocking the diffusion of corrosive anions. Observations from micro-analytical images confirmed the effective inhibition property of the compound and its presence on the surface topography of the steel. Infrared spectra revealed the presence of the functional groups of the organic compound responsible for corrosion inhibition. The adsorption of the compound was deduced to obey the Langmuir, Frumkin and Freundlich adsorption isotherm.
publishDate 2017
dc.date.issued.spa.fl_str_mv 2017-01-01
dc.date.accessioned.spa.fl_str_mv 2019-07-03T01:48:34Z
dc.date.available.spa.fl_str_mv 2019-07-03T01:48:34Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.identifier.issn.spa.fl_str_mv ISSN: 2357-3791
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identifier_str_mv ISSN: 2357-3791
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dc.language.iso.spa.fl_str_mv spa
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dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/rcolquim/article/view/59578
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Química
Revista Colombiana de Química
dc.relation.references.spa.fl_str_mv Loto, Roland (2017) Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media. Revista Colombiana de Química, 46 (1). pp. 20-32. ISSN 2357-3791
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
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eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.spa.fl_str_mv Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química
institution Universidad Nacional de Colombia
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Loto, Roland2d2d68a4-d4dd-4c59-85e1-c05f8a7bece13002019-07-03T01:48:34Z2019-07-03T01:48:34Z2017-01-01ISSN: 2357-3791https://repositorio.unal.edu.co/handle/unal/66271http://bdigital.unal.edu.co/67295/Mild steel corrosion is responsible for economic and industrial losses due to accelerated deterioration. Synthesized derivatives of thiourea and phenolic aldehydes containing heteroatoms are capable of inhibiting corrosion by adsorption onto the steel through formation of strong bonds. Thus, the electrochemical corrosion inhibition properties of the combined admixture of 1,3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in 1 M H2SO4 andHCl acid media were studied through weight loss analysis, potentiodynamic polarization method, optical microscopy and IR spectroscopy. Results showed that the organic mixture effectively inhibited the corrosion of mild steel in both solutions with an optimal inhibition efficiency of 97.4% and 97.47% in H2SO4 from weight loss and potentiodynamic polarization test, while the corresponding values in HCl were 94.71% and 89.73% respectively. Thermodynamic calculations showed that the compound chemisorbed onto the steel surface blocking the diffusion of corrosive anions. Observations from micro-analytical images confirmed the effective inhibition property of the compound and its presence on the surface topography of the steel. Infrared spectra revealed the presence of the functional groups of the organic compound responsible for corrosion inhibition. The adsorption of the compound was deduced to obey the Langmuir, Frumkin and Freundlich adsorption isotherm.La corrosión de acero dulce es responsable de pérdidas económicas e industriales debido a su deterioro acelerado. Los derivados sintetizados de tiourea y aldehídos fenólicos con heteroátomos inhiben la corrosión por adsorción sobre el acero mediante la formación de enlaces fuertes. Por tanto, se estudiaron las propiedades de inhibición de la corrosión electroquímica de la mezcla combinada de 1,3-difenil-2-tiourea y 4-hidroxi-3-metoxibenzaldehído sobre acero dulce en medios de H2SO4 y HCl 1 M mediante análisis de pérdida de peso, método de polarización potenciodinámica, microscopía óptica y espectroscopia IR. Los resultados mostraron que la mezcla inhibe eficazmente la corrosión del acero dulce en ambas soluciones con una eficacia de inhibición óptima de 97,4% y 97,47% en H2SO4, mientras que los valorescorrespondientes al HCl son 94,71% y 89,73%. Los cálculos termodinámicos demostraron que el compuesto quimiosorbido sobre la superficie de acero bloquea la difusión de aniones corrosivos. Las imágenes micro-analíticas confirmaron la efectiva propiedad de inhibición del compuesto y su presencia en la topografía superficial del acero. Los espectros infrarrojos revelaron la presencia de los grupos funcionales del compuesto orgánico responsable de la inhibición de la corrosión. La adsorción del compuesto se dedujo siguiendo las isotermas de adsorción de Langmuir, Frumkin y Freundlich.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Químicahttps://revistas.unal.edu.co/index.php/rcolquim/article/view/59578Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de QuímicaRevista Colombiana de QuímicaLoto, Roland (2017) Corrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid media. Revista Colombiana de Química, 46 (1). pp. 20-32. ISSN 2357-379154 Química y ciencias afines / ChemistryCorrosionadsorcióncorrosiónacero dulceinhibidorácido clorhídricoácido sulfúricoCorrosion inhibition studies of the combined admixture of 1, 3-diphenyl-2-thiourea and 4-hydroxy-3-methoxybenzaldehyde on mild steel in dilute acid mediaArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL59578-324049-1-PB.pdfapplication/pdf5699314https://repositorio.unal.edu.co/bitstream/unal/66271/1/59578-324049-1-PB.pdfb53fa198fa74b89d2935c86959163a7fMD51THUMBNAIL59578-324049-1-PB.pdf.jpg59578-324049-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg9763https://repositorio.unal.edu.co/bitstream/unal/66271/2/59578-324049-1-PB.pdf.jpg2d0b6fcaf0256f29b94034b9ef5d3873MD52unal/66271oai:repositorio.unal.edu.co:unal/662712023-05-24 23:02:57.412Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co

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