Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media

Autores
Tomachuk, C. R.; Elsner, Cecilia Inés; Di Sarli, Alejandro Ramón; Ferraz, O. B.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The corrosion resistance of pure zinc coatings can be improved through the application of suitable chemical passivation treatments. Hexavalent chromium compounds have widely been used to formulate conversion layers providing better anticorrosive protection as well as anchorage properties to painting systems. However, taking into account that they are produced using hazardous chemical compounds, the development of alternative and “green” technologies with equivalent protective performance is a paramount purpose of many R&D laboratories working around the world. In the present paper, the corrosion behavior of zinc coatings obtained from free-cyanide alkaline baths and later subjected to a Cr3+ based passivation treatment, with and without a sealing treatment, was studied. The experimental work involved electrochemical impedance spectroscopy measurements in 0.5M NaCl solution, surface microstructural and morphological characterization by electronic microscopy as well as chemical analysis by EDXS. The salt spray test was also performed. The analysis and interpretation of all the data coming from this battery of tests allowed inferring that both the Cr3+ based conversion treatment + adequate sealer presented a good corrosion resistance and, therefore, they could be used as neither a polluting nor toxic alternative to the traditional chromate coatings.
Centro de Investigación y Desarrollo en Tecnología de Pinturas
Materia
Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/81946
Acceder
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network_name_str SEDICI (UNLP)
spelling Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing MediaTomachuk, C. R.Elsner, Cecilia InésDi Sarli, Alejandro RamónFerraz, O. B.QuímicaInterfacesCorrosionElectrochemical propertiesCoatingsSEMThe corrosion resistance of pure zinc coatings can be improved through the application of suitable chemical passivation treatments. Hexavalent chromium compounds have widely been used to formulate conversion layers providing better anticorrosive protection as well as anchorage properties to painting systems. However, taking into account that they are produced using hazardous chemical compounds, the development of alternative and “green” technologies with equivalent protective performance is a paramount purpose of many R&D laboratories working around the world. In the present paper, the corrosion behavior of zinc coatings obtained from free-cyanide alkaline baths and later subjected to a Cr3+ based passivation treatment, with and without a sealing treatment, was studied. The experimental work involved electrochemical impedance spectroscopy measurements in 0.5M NaCl solution, surface microstructural and morphological characterization by electronic microscopy as well as chemical analysis by EDXS. The salt spray test was also performed. The analysis and interpretation of all the data coming from this battery of tests allowed inferring that both the Cr3+ based conversion treatment + adequate sealer presented a good corrosion resistance and, therefore, they could be used as neither a polluting nor toxic alternative to the traditional chromate coatings.Centro de Investigación y Desarrollo en Tecnología de Pinturas2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf19-29http://sedici.unlp.edu.ar/handle/10915/81946enginfo:eu-repo/semantics/altIdentifier/issn/0254-0584info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2009.07.041info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:56:07Zoai:sedici.unlp.edu.ar:10915/81946Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:56:07.989SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
spellingShingle Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
Tomachuk, C. R.
Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
title_short Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_full Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_fullStr Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_full_unstemmed Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_sort Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
dc.creator.none.fl_str_mv Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Ferraz, O. B.
author Tomachuk, C. R.
author_facet Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Ferraz, O. B.
author_role author
author2 Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Ferraz, O. B.
author2_role author
author
author
dc.subject.none.fl_str_mv Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
topic Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
dc.description.none.fl_txt_mv The corrosion resistance of pure zinc coatings can be improved through the application of suitable chemical passivation treatments. Hexavalent chromium compounds have widely been used to formulate conversion layers providing better anticorrosive protection as well as anchorage properties to painting systems. However, taking into account that they are produced using hazardous chemical compounds, the development of alternative and “green” technologies with equivalent protective performance is a paramount purpose of many R&D laboratories working around the world. In the present paper, the corrosion behavior of zinc coatings obtained from free-cyanide alkaline baths and later subjected to a Cr3+ based passivation treatment, with and without a sealing treatment, was studied. The experimental work involved electrochemical impedance spectroscopy measurements in 0.5M NaCl solution, surface microstructural and morphological characterization by electronic microscopy as well as chemical analysis by EDXS. The salt spray test was also performed. The analysis and interpretation of all the data coming from this battery of tests allowed inferring that both the Cr3+ based conversion treatment + adequate sealer presented a good corrosion resistance and, therefore, they could be used as neither a polluting nor toxic alternative to the traditional chromate coatings.
Centro de Investigación y Desarrollo en Tecnología de Pinturas
description The corrosion resistance of pure zinc coatings can be improved through the application of suitable chemical passivation treatments. Hexavalent chromium compounds have widely been used to formulate conversion layers providing better anticorrosive protection as well as anchorage properties to painting systems. However, taking into account that they are produced using hazardous chemical compounds, the development of alternative and “green” technologies with equivalent protective performance is a paramount purpose of many R&D laboratories working around the world. In the present paper, the corrosion behavior of zinc coatings obtained from free-cyanide alkaline baths and later subjected to a Cr3+ based passivation treatment, with and without a sealing treatment, was studied. The experimental work involved electrochemical impedance spectroscopy measurements in 0.5M NaCl solution, surface microstructural and morphological characterization by electronic microscopy as well as chemical analysis by EDXS. The salt spray test was also performed. The analysis and interpretation of all the data coming from this battery of tests allowed inferring that both the Cr3+ based conversion treatment + adequate sealer presented a good corrosion resistance and, therefore, they could be used as neither a polluting nor toxic alternative to the traditional chromate coatings.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/81946
url http://sedici.unlp.edu.ar/handle/10915/81946
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0254-0584
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2009.07.041
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
19-29
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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