Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution

Corrosion inhibition of biodegradable chemical compounds (L-leucine and trypsin complex) on high carbon steel in 1 M H2SO4 acid media was evaluated with potentiodynamic polarization technique, weight loss analysis, open circuit potential measurement, optical microscopy, and ATR-FTIR spectroscopy. Da...

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Autores:
Loto, Roland
Tipo de recurso:
Article of journal
Fecha de publicación:
2018
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/66246
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/66246
http://bdigital.unal.edu.co/67270/
Palabra clave:
54 Química y ciencias afines / Chemistry
corrosion
carbon steel
sulphuric acid
l-leucine
trypsin complex
corrosión
acero carbono
ácido sulfúrico
L-leucina
complejo de tripsina.
corrosão
Aço carbono
ácido sulfúrico
L-leucina
complexo de tripsina.
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_c5140d5d7205501911f81aa88236591c
oai_identifier_str oai:repositorio.unal.edu.co:unal/66246
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
title Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
spellingShingle Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
54 Química y ciencias afines / Chemistry
corrosion
carbon steel
sulphuric acid
l-leucine
trypsin complex
corrosión
acero carbono
ácido sulfúrico
L-leucina
complejo de tripsina.
corrosão
Aço carbono
ácido sulfúrico
L-leucina
complexo de tripsina.
title_short Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
title_full Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
title_fullStr Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
title_full_unstemmed Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
title_sort Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution
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
carbon steel
sulphuric acid
l-leucine
trypsin complex
corrosión
acero carbono
ácido sulfúrico
L-leucina
complejo de tripsina.
corrosão
Aço carbono
ácido sulfúrico
L-leucina
complexo de tripsina.
dc.subject.proposal.spa.fl_str_mv corrosion
carbon steel
sulphuric acid
l-leucine
trypsin complex
corrosión
acero carbono
ácido sulfúrico
L-leucina
complejo de tripsina.
corrosão
Aço carbono
ácido sulfúrico
L-leucina
complexo de tripsina.
description Corrosion inhibition of biodegradable chemical compounds (L-leucine and trypsin complex) on high carbon steel in 1 M H2SO4 acid media was evaluated with potentiodynamic polarization technique, weight loss analysis, open circuit potential measurement, optical microscopy, and ATR-FTIR spectroscopy. Data obtained showed the mixture has a maximum inhibition efficiency of 82.4% and 90.08% from the electrochemical tests with mixed type inhibition properties. The addition of the mixture shifts significantly the corrosion potential of the steel to passivation values from open circuit potential measurement. Results from thermodynamic calculations indicated chemisorption adsorption mechanism according to Langmuir, Freundlich, and Frumkin isotherms coupled with correlation coefficients of 0.9994, 0.9651 and 0.8834. Statistical analysis showed exposure time to be the most significant variable responsible for corrosion inhibition. Identified functional groups of the compound from ATF-FTIR spectroscopy were adsorbed completely on the carbon steel surface from observation of the decreased peak intensity. Optical microscopy images of the inhibited and uninhibited steel surfaces contrast each other with due to the presence of macro-pits and porous oxide on the uninhibited steel.
publishDate 2018
dc.date.issued.spa.fl_str_mv 2018-05-01
dc.date.accessioned.spa.fl_str_mv 2019-07-03T01:45:35Z
dc.date.available.spa.fl_str_mv 2019-07-03T01:45:35Z
dc.type.spa.fl_str_mv Artículo de revista
dc.type.coar.fl_str_mv http://purl.org/coar/resource_type/c_2df8fbb1
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/article
dc.type.version.spa.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.coar.spa.fl_str_mv http://purl.org/coar/resource_type/c_6501
dc.type.coarversion.spa.fl_str_mv http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.content.spa.fl_str_mv Text
dc.type.redcol.spa.fl_str_mv http://purl.org/redcol/resource_type/ART
format http://purl.org/coar/resource_type/c_6501
status_str publishedVersion
dc.identifier.issn.spa.fl_str_mv ISSN: 2357-3791
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/66246
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/67270/
identifier_str_mv ISSN: 2357-3791
url https://repositorio.unal.edu.co/handle/unal/66246
http://bdigital.unal.edu.co/67270/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/rcolquim/article/view/68058
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 (2018) Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution. Revista Colombiana de Química, 47 (2). pp. 12-20. 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
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
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/
http://purl.org/coar/access_right/c_abf2
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
bitstream.url.fl_str_mv https://repositorio.unal.edu.co/bitstream/unal/66246/1/68058-385687-1-PB.pdf
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repository.name.fl_str_mv Repositorio Institucional 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-c05f8a7bece13002019-07-03T01:45:35Z2019-07-03T01:45:35Z2018-05-01ISSN: 2357-3791https://repositorio.unal.edu.co/handle/unal/66246http://bdigital.unal.edu.co/67270/Corrosion inhibition of biodegradable chemical compounds (L-leucine and trypsin complex) on high carbon steel in 1 M H2SO4 acid media was evaluated with potentiodynamic polarization technique, weight loss analysis, open circuit potential measurement, optical microscopy, and ATR-FTIR spectroscopy. Data obtained showed the mixture has a maximum inhibition efficiency of 82.4% and 90.08% from the electrochemical tests with mixed type inhibition properties. The addition of the mixture shifts significantly the corrosion potential of the steel to passivation values from open circuit potential measurement. Results from thermodynamic calculations indicated chemisorption adsorption mechanism according to Langmuir, Freundlich, and Frumkin isotherms coupled with correlation coefficients of 0.9994, 0.9651 and 0.8834. Statistical analysis showed exposure time to be the most significant variable responsible for corrosion inhibition. Identified functional groups of the compound from ATF-FTIR spectroscopy were adsorbed completely on the carbon steel surface from observation of the decreased peak intensity. Optical microscopy images of the inhibited and uninhibited steel surfaces contrast each other with due to the presence of macro-pits and porous oxide on the uninhibited steel.Se evaluó la inhibición de la corrosión por parte de compuestos químicos biodegradables (complejo de L-leucina y tripsina) sobre acero de alto contenido de carbono en H2SO4 1 M a través de técnica de polarización potenciodinámica, análisis de pérdida de peso, medición de potencial de circuito abierto, microscopía óptica y espectroscopia ATR-FTIR. Los datos obtenidos mostraron que la mezcla tiene una eficacia de inhibición máxima de 82,4% y 90,08%, a partir de las pruebas electroquímicas con propiedades de inhibición de tipo mixto. La adición de la mezcla cambia significativamente el potencial de corrosión del acero a los valores de pasivación de la medición del potencial de circuito abierto. Los resultados de los cálculos termodinámicos indicaron un mecanismo de adsorción por quimisorción de acuerdo con las isotermas Langmuir, Freundlich y Frumkin, acopladas con coeficientes de correlación de 0,9994; 0,9651 y 0,8834, respectivamente. El análisis estadístico mostró que el tiempo de exposición es la variable más importante en la inhibición de la corrosión. Los grupos funcionales de la mezcla, identificados mediante espectroscopía ATF-FTIR, fueron completamente adsorbidos en la superficie de acero al carbono; esto se dedujo a partir de la observación de la disminución de la intensidad de pico. Las imágenes de microscopía óptica de las superficies de acero inhibidas y desinhibidas contrastan entre sí, debido a la presencia de macro-pozos y óxido poroso en el acero desinhibido.Foram feitos estudos de inibição da corrosão de compostos químicos biodegradáveis ccomplexo de L-leucina e tripsina) em aço de alto conteúdo de carbono em meio de H2SO4 1 M, estes foram avaliados com técnica de polarização potenciodinâmica, análise de perda de peso, medição de potencial de circuito aberto, microscopia óptica e espectroscopia ATR-FTIR. Os dados obtidos mostram que a mistura tem uma eficiência de inibição máxima de 82,4% e 90,08% dos testes eletroquímicos com propriedades de inibição do tipo misto. A adição da mistura desloca significativamente o potencial de corrosão do aço para valores de passivação da medição de potencial de circuito aberto. Os resultados dos cálculos termodinâmicos indicam o mecanismo de adsorção de quimisorção de acordo com as isotermas de Langmuir, Freundlich e Frumkin, juntamente com coeficientes de correlação de 0,9994; 0,9651 e 0,8834 respectivamente. A análise estatística mostrou que o tempo de exposição é a variável mais significativa da inibição da corrosão. Os grupos funcionais identificados pela espectroscopia ATF-FTIR foram completamente adsorvidos na superfície do aço ao carbono, de acordo com a observação da intensidade de pico diminuída. As imagens de microscopia óptica das superfícies de aço inibidas e desinibidas contrastam entre si devido à presença de macro-poços e óxido poroso no aço desinibido.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Químicahttps://revistas.unal.edu.co/index.php/rcolquim/article/view/68058Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de QuímicaRevista Colombiana de QuímicaLoto, Roland (2018) Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solution. Revista Colombiana de Química, 47 (2). pp. 12-20. ISSN 2357-379154 Química y ciencias afines / Chemistrycorrosioncarbon steelsulphuric acidl-leucinetrypsin complexcorrosiónacero carbonoácido sulfúricoL-leucinacomplejo de tripsina.corrosãoAço carbonoácido sulfúricoL-leucinacomplexo de tripsina.Electrochemical analysis of the corrosion inhibition properties of L-leucine and trypsin complex admixture on high carbon steel in 1 M H2SO4 solutionArtículo 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/ARTORIGINAL68058-385687-1-PB.pdfapplication/pdf1010313https://repositorio.unal.edu.co/bitstream/unal/66246/1/68058-385687-1-PB.pdfe7bf0f3d15788aff1952c3e4c6e25121MD51THUMBNAIL68058-385687-1-PB.pdf.jpg68058-385687-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg8348https://repositorio.unal.edu.co/bitstream/unal/66246/2/68058-385687-1-PB.pdf.jpg4e493d154bfc0d3face2598e4468a5c3MD52unal/66246oai:repositorio.unal.edu.co:unal/662462023-05-24 23:02:50.248Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co

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