Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions
- Autores
- Yohai del Cerro, Lucía; Schreiner, Wido H.; Vazquez, Marcela Vivian; Valcarce, María Beatriz
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- This investigation focuses on sodium biphosphate (Na2HPO4) as corrosion inhibitor for construction steel. All the tests are carried out in a solution that simulates the composition of the pores in chloride-contaminated carbonated concrete. The carbonated solution (CS) contained Na2CO3 (0.0015 mol L-1), NaHCO3 (0.03 mol L-1) and NaCl (0.1 mol L-1), resulting in [Cl-]/[OH-]=10000. Inhibited solutions (IS20, IS60 and IS100) incorporated 20, 60, and 100 mmol L-1 Na2HPO4 respectively. These were labeled IS20, IS60 and IS100 respectively and result in [HPO42-]/[Cl-] = 0.2, 0.6, and 1. Cyclic voltammograms and anodic polarization curves were complemented with micro-Raman spectroscopy and XPS, to evaluate the surface film composition. The results show that chloride contamination promotes active corrosion. When phosphate ions are incorporated, steel becomes passive with a more positive corrosion potential (Ecorr), and pitting presents as the predominant form of localized corrosion. Raman spectra show a broad band, centred in 982 cm-1, suggesting that phosphates incorporate to the passive film. Phosphates are also present in the corrosion products. The surface film becomes more protective to pitting for the highest biphosphate content. However, after pitting no repassivation was detected. After over one month in immersion, steel remains passive in the condition IS100, with inhibition efficiency higher than 99%. In contrast, in the case of IS60 and IS20, pitting was detected.It can be concluded that phosphate ions are good candidates to be used as corrosion inhibitors for steel in chloride-contaminated concrete.
Fil: Yohai del Cerro, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Schreiner, Wido H.. Universidade Federal do Paraná; Brasil
Fil: Vazquez, Marcela Vivian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Valcarce, María Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina - Materia
-
Phosphate
Inhibitors
Chloride
Steel
Carbonated Concrete - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/33386
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Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ionsYohai del Cerro, LucíaSchreiner, Wido H.Vazquez, Marcela VivianValcarce, María BeatrizPhosphateInhibitorsChlorideSteelCarbonated Concretehttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2This investigation focuses on sodium biphosphate (Na2HPO4) as corrosion inhibitor for construction steel. All the tests are carried out in a solution that simulates the composition of the pores in chloride-contaminated carbonated concrete. The carbonated solution (CS) contained Na2CO3 (0.0015 mol L-1), NaHCO3 (0.03 mol L-1) and NaCl (0.1 mol L-1), resulting in [Cl-]/[OH-]=10000. Inhibited solutions (IS20, IS60 and IS100) incorporated 20, 60, and 100 mmol L-1 Na2HPO4 respectively. These were labeled IS20, IS60 and IS100 respectively and result in [HPO42-]/[Cl-] = 0.2, 0.6, and 1. Cyclic voltammograms and anodic polarization curves were complemented with micro-Raman spectroscopy and XPS, to evaluate the surface film composition. The results show that chloride contamination promotes active corrosion. When phosphate ions are incorporated, steel becomes passive with a more positive corrosion potential (Ecorr), and pitting presents as the predominant form of localized corrosion. Raman spectra show a broad band, centred in 982 cm-1, suggesting that phosphates incorporate to the passive film. Phosphates are also present in the corrosion products. The surface film becomes more protective to pitting for the highest biphosphate content. However, after pitting no repassivation was detected. After over one month in immersion, steel remains passive in the condition IS100, with inhibition efficiency higher than 99%. In contrast, in the case of IS60 and IS20, pitting was detected.It can be concluded that phosphate ions are good candidates to be used as corrosion inhibitors for steel in chloride-contaminated concrete.Fil: Yohai del Cerro, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Schreiner, Wido H.. Universidade Federal do Paraná; BrasilFil: Vazquez, Marcela Vivian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Valcarce, María Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaPergamon-Elsevier Science Ltd.2016-10-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/33386Yohai del Cerro, Lucía; Schreiner, Wido H.; Vazquez, Marcela Vivian; Valcarce, María Beatriz; Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions; Pergamon-Elsevier Science Ltd.; Electrochimica Acta; 202; 30-10-2016; 231-2420013-4686CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.electacta.2015.10.167info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0013468615307441?via%3Dihubinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:12:21Zoai:ri.conicet.gov.ar:11336/33386instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:12:22.139CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
title |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
spellingShingle |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions Yohai del Cerro, Lucía Phosphate Inhibitors Chloride Steel Carbonated Concrete |
title_short |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
title_full |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
title_fullStr |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
title_full_unstemmed |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
title_sort |
Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions |
dc.creator.none.fl_str_mv |
Yohai del Cerro, Lucía Schreiner, Wido H. Vazquez, Marcela Vivian Valcarce, María Beatriz |
author |
Yohai del Cerro, Lucía |
author_facet |
Yohai del Cerro, Lucía Schreiner, Wido H. Vazquez, Marcela Vivian Valcarce, María Beatriz |
author_role |
author |
author2 |
Schreiner, Wido H. Vazquez, Marcela Vivian Valcarce, María Beatriz |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Phosphate Inhibitors Chloride Steel Carbonated Concrete |
topic |
Phosphate Inhibitors Chloride Steel Carbonated Concrete |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
This investigation focuses on sodium biphosphate (Na2HPO4) as corrosion inhibitor for construction steel. All the tests are carried out in a solution that simulates the composition of the pores in chloride-contaminated carbonated concrete. The carbonated solution (CS) contained Na2CO3 (0.0015 mol L-1), NaHCO3 (0.03 mol L-1) and NaCl (0.1 mol L-1), resulting in [Cl-]/[OH-]=10000. Inhibited solutions (IS20, IS60 and IS100) incorporated 20, 60, and 100 mmol L-1 Na2HPO4 respectively. These were labeled IS20, IS60 and IS100 respectively and result in [HPO42-]/[Cl-] = 0.2, 0.6, and 1. Cyclic voltammograms and anodic polarization curves were complemented with micro-Raman spectroscopy and XPS, to evaluate the surface film composition. The results show that chloride contamination promotes active corrosion. When phosphate ions are incorporated, steel becomes passive with a more positive corrosion potential (Ecorr), and pitting presents as the predominant form of localized corrosion. Raman spectra show a broad band, centred in 982 cm-1, suggesting that phosphates incorporate to the passive film. Phosphates are also present in the corrosion products. The surface film becomes more protective to pitting for the highest biphosphate content. However, after pitting no repassivation was detected. After over one month in immersion, steel remains passive in the condition IS100, with inhibition efficiency higher than 99%. In contrast, in the case of IS60 and IS20, pitting was detected.It can be concluded that phosphate ions are good candidates to be used as corrosion inhibitors for steel in chloride-contaminated concrete. Fil: Yohai del Cerro, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina Fil: Schreiner, Wido H.. Universidade Federal do Paraná; Brasil Fil: Vazquez, Marcela Vivian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina Fil: Valcarce, María Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina |
description |
This investigation focuses on sodium biphosphate (Na2HPO4) as corrosion inhibitor for construction steel. All the tests are carried out in a solution that simulates the composition of the pores in chloride-contaminated carbonated concrete. The carbonated solution (CS) contained Na2CO3 (0.0015 mol L-1), NaHCO3 (0.03 mol L-1) and NaCl (0.1 mol L-1), resulting in [Cl-]/[OH-]=10000. Inhibited solutions (IS20, IS60 and IS100) incorporated 20, 60, and 100 mmol L-1 Na2HPO4 respectively. These were labeled IS20, IS60 and IS100 respectively and result in [HPO42-]/[Cl-] = 0.2, 0.6, and 1. Cyclic voltammograms and anodic polarization curves were complemented with micro-Raman spectroscopy and XPS, to evaluate the surface film composition. The results show that chloride contamination promotes active corrosion. When phosphate ions are incorporated, steel becomes passive with a more positive corrosion potential (Ecorr), and pitting presents as the predominant form of localized corrosion. Raman spectra show a broad band, centred in 982 cm-1, suggesting that phosphates incorporate to the passive film. Phosphates are also present in the corrosion products. The surface film becomes more protective to pitting for the highest biphosphate content. However, after pitting no repassivation was detected. After over one month in immersion, steel remains passive in the condition IS100, with inhibition efficiency higher than 99%. In contrast, in the case of IS60 and IS20, pitting was detected.It can be concluded that phosphate ions are good candidates to be used as corrosion inhibitors for steel in chloride-contaminated concrete. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-10-30 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/33386 Yohai del Cerro, Lucía; Schreiner, Wido H.; Vazquez, Marcela Vivian; Valcarce, María Beatriz; Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions; Pergamon-Elsevier Science Ltd.; Electrochimica Acta; 202; 30-10-2016; 231-242 0013-4686 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/33386 |
identifier_str_mv |
Yohai del Cerro, Lucía; Schreiner, Wido H.; Vazquez, Marcela Vivian; Valcarce, María Beatriz; Phosphate ions as effective inhibitors for carbon steel in carbonated solutions contaminated with chloride ions; Pergamon-Elsevier Science Ltd.; Electrochimica Acta; 202; 30-10-2016; 231-242 0013-4686 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.electacta.2015.10.167 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0013468615307441?via%3Dihub |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd. |
publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd. |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844614030279311360 |
score |
13.070432 |