Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized
- Autores
- Tomachuk, C. R.; Di Sarli, Alejandro Ramón; Elsner, Cecilia Inés
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Hexavalent chromium-based passivation treatments have been successfully used as promoters of conversion coatings for many years. Their effectiveness is without question although there are many problems with regard to their environmental suitability. Hexavalent chromium compounds are carcinogenic and toxic. These problems have lead researchers to evaluate other potential systems, with lower toxicity, to ascertain if they can replace chromates as effective passivators. Researchers have proposed several alternative passivation treatments; these are processes based on molybdates, permanganates, titanates, rare earth metal and Cr3+ (considered to be non-carcinogenic) compounds. In this work, zinc coatings obtained from free-cyanide alkaline bath and submitted to a Cr3+ based passivation treatment with different colors were studied. The corrosion behavior was studied by polarization measurements and mainly by electrochemical impedance spectroscopy in 0.6 N NaCl solution. Morphological observations on the coatings surface were also performed. The results indicate that the green-colored Cr3+ passivated coatings have a good corrosion resistance followed by yellow and blue-colored passivation respectively. They could be a less polluting alternative to the traditional chromated coatings.
Centro de Investigación y Desarrollo en Tecnología de Pinturas - Materia
-
Química
Zinc
Conversion Treatment
Impedance Spectroscopy
Salt Spray
Corrosion - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-nd/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/81948
Ver los metadatos del registro completo
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Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on ElectrogalvanizedTomachuk, C. R.Di Sarli, Alejandro RamónElsner, Cecilia InésQuímicaZincConversion TreatmentImpedance SpectroscopySalt SprayCorrosionHexavalent chromium-based passivation treatments have been successfully used as promoters of conversion coatings for many years. Their effectiveness is without question although there are many problems with regard to their environmental suitability. Hexavalent chromium compounds are carcinogenic and toxic. These problems have lead researchers to evaluate other potential systems, with lower toxicity, to ascertain if they can replace chromates as effective passivators. Researchers have proposed several alternative passivation treatments; these are processes based on molybdates, permanganates, titanates, rare earth metal and Cr3+ (considered to be non-carcinogenic) compounds. In this work, zinc coatings obtained from free-cyanide alkaline bath and submitted to a Cr3+ based passivation treatment with different colors were studied. The corrosion behavior was studied by polarization measurements and mainly by electrochemical impedance spectroscopy in 0.6 N NaCl solution. Morphological observations on the coatings surface were also performed. The results indicate that the green-colored Cr3+ passivated coatings have a good corrosion resistance followed by yellow and blue-colored passivation respectively. They could be a less polluting alternative to the traditional chromated 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/pdf202-209http://sedici.unlp.edu.ar/handle/10915/81948enginfo:eu-repo/semantics/altIdentifier/issn/2153-1188info:eu-repo/semantics/altIdentifier/doi/10.4236/msa.2010.14032info: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:UNLP2025-09-29T11:15:17Zoai:sedici.unlp.edu.ar:10915/81948Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:17.586SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
title |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
spellingShingle |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized Tomachuk, C. R. Química Zinc Conversion Treatment Impedance Spectroscopy Salt Spray Corrosion |
title_short |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
title_full |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
title_fullStr |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
title_full_unstemmed |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
title_sort |
Anti-Corrosion Performance of Cr+6-Free Passivating Layers Applied on Electrogalvanized |
dc.creator.none.fl_str_mv |
Tomachuk, C. R. Di Sarli, Alejandro Ramón Elsner, Cecilia Inés |
author |
Tomachuk, C. R. |
author_facet |
Tomachuk, C. R. Di Sarli, Alejandro Ramón Elsner, Cecilia Inés |
author_role |
author |
author2 |
Di Sarli, Alejandro Ramón Elsner, Cecilia Inés |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Química Zinc Conversion Treatment Impedance Spectroscopy Salt Spray Corrosion |
topic |
Química Zinc Conversion Treatment Impedance Spectroscopy Salt Spray Corrosion |
dc.description.none.fl_txt_mv |
Hexavalent chromium-based passivation treatments have been successfully used as promoters of conversion coatings for many years. Their effectiveness is without question although there are many problems with regard to their environmental suitability. Hexavalent chromium compounds are carcinogenic and toxic. These problems have lead researchers to evaluate other potential systems, with lower toxicity, to ascertain if they can replace chromates as effective passivators. Researchers have proposed several alternative passivation treatments; these are processes based on molybdates, permanganates, titanates, rare earth metal and Cr3+ (considered to be non-carcinogenic) compounds. In this work, zinc coatings obtained from free-cyanide alkaline bath and submitted to a Cr3+ based passivation treatment with different colors were studied. The corrosion behavior was studied by polarization measurements and mainly by electrochemical impedance spectroscopy in 0.6 N NaCl solution. Morphological observations on the coatings surface were also performed. The results indicate that the green-colored Cr3+ passivated coatings have a good corrosion resistance followed by yellow and blue-colored passivation respectively. They could be a less polluting alternative to the traditional chromated coatings. Centro de Investigación y Desarrollo en Tecnología de Pinturas |
description |
Hexavalent chromium-based passivation treatments have been successfully used as promoters of conversion coatings for many years. Their effectiveness is without question although there are many problems with regard to their environmental suitability. Hexavalent chromium compounds are carcinogenic and toxic. These problems have lead researchers to evaluate other potential systems, with lower toxicity, to ascertain if they can replace chromates as effective passivators. Researchers have proposed several alternative passivation treatments; these are processes based on molybdates, permanganates, titanates, rare earth metal and Cr3+ (considered to be non-carcinogenic) compounds. In this work, zinc coatings obtained from free-cyanide alkaline bath and submitted to a Cr3+ based passivation treatment with different colors were studied. The corrosion behavior was studied by polarization measurements and mainly by electrochemical impedance spectroscopy in 0.6 N NaCl solution. Morphological observations on the coatings surface were also performed. The results indicate that the green-colored Cr3+ passivated coatings have a good corrosion resistance followed by yellow and blue-colored passivation respectively. They could be a less polluting alternative to the traditional chromated 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/10915/81948 |
url |
http://sedici.unlp.edu.ar/handle/10915/81948 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/2153-1188 info:eu-repo/semantics/altIdentifier/doi/10.4236/msa.2010.14032 |
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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) |
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application/pdf 202-209 |
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SEDICI (UNLP) - Universidad Nacional de La Plata |
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