Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel
- Autores
- Culcasi, José Daniel; Elsner, Cecilia Ines; Di Sarli, Alejandro Ramón; Palomino, Luis; Tomachuk, Celia Regina; Costa, Ilda
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Ce-based conversion films have been assessed as alternatives for replacement of Cr6+-based films,which have been forbidden for their toxicity and carcinogenic properties. However, corrosion protection associated with chromate films is difficult to achieve by other surface treatments. Experimental results have revealed that to obtain the highly satisfactory results provided by chromate-based conversion coatings, it is necessary to improve the anticorrosive properties of the new chromium-free coatings. The present work deals with the effect of the oxidant concentration in the cerium-based conversion baths on the corrosion resistance of the films deposited on galvanized steel. Electrogalvanized steel sheets were exposed to cerium chloride-based baths with different concentrations of oxidant for a minute. The surface of the treated samples was analyzed by XPS and SEM-EDXS, while its corrosion resistance was investigated using electrochemical tests (EIS) conducted in a 0.05 M NaCl solution and the impedance spectra evolution analyzed as a function of the exposure time. The results showed a direct relationship between oxidant concentration and corrosion resistance. When the oxidant concentration rose from2mL.L-1 to 12mL.L-1, the corrosion resistance increased about 5 times, and this was attributed to the decrease in the Ce3+/Ce4+ relationship of the conversion film.
Fil: Culcasi, José Daniel. Universidad Nacional de La Plata; Argentina
Fil: Elsner, Cecilia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Ópticas. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones Ópticas. Universidad Nacional de La Plata. Centro de Investigaciones Ópticas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Di Sarli, Alejandro Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Ópticas. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones Ópticas. Universidad Nacional de La Plata. Centro de Investigaciones Ópticas; Argentina
Fil: Palomino, Luis. Universidade de Sao Paulo; Brasil
Fil: Tomachuk, Celia Regina. Instituto de Investigaciones Energéticas y Nucleares. San Pablo; Brasil
Fil: Costa, Ilda. Instituto de Investigaciones Energéticas y Nucleares. San Pablo; Brasil - Materia
-
GALVANIZED STEEL
Ce-BASED CONVERSION FILMS
CORROSION
EIS
SEM
EDXS
XPS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/33500
Ver los metadatos del registro completo
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Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steelCulcasi, José DanielElsner, Cecilia InesDi Sarli, Alejandro RamónPalomino, LuisTomachuk, Celia ReginaCosta, IldaGALVANIZED STEELCe-BASED CONVERSION FILMSCORROSIONEISSEMEDXSXPShttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Ce-based conversion films have been assessed as alternatives for replacement of Cr6+-based films,which have been forbidden for their toxicity and carcinogenic properties. However, corrosion protection associated with chromate films is difficult to achieve by other surface treatments. Experimental results have revealed that to obtain the highly satisfactory results provided by chromate-based conversion coatings, it is necessary to improve the anticorrosive properties of the new chromium-free coatings. The present work deals with the effect of the oxidant concentration in the cerium-based conversion baths on the corrosion resistance of the films deposited on galvanized steel. Electrogalvanized steel sheets were exposed to cerium chloride-based baths with different concentrations of oxidant for a minute. The surface of the treated samples was analyzed by XPS and SEM-EDXS, while its corrosion resistance was investigated using electrochemical tests (EIS) conducted in a 0.05 M NaCl solution and the impedance spectra evolution analyzed as a function of the exposure time. The results showed a direct relationship between oxidant concentration and corrosion resistance. When the oxidant concentration rose from2mL.L-1 to 12mL.L-1, the corrosion resistance increased about 5 times, and this was attributed to the decrease in the Ce3+/Ce4+ relationship of the conversion film.Fil: Culcasi, José Daniel. Universidad Nacional de La Plata; ArgentinaFil: Elsner, Cecilia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Ópticas. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones Ópticas. Universidad Nacional de La Plata. Centro de Investigaciones Ópticas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Di Sarli, Alejandro Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Ópticas. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones Ópticas. Universidad Nacional de La Plata. Centro de Investigaciones Ópticas; ArgentinaFil: Palomino, Luis. Universidade de Sao Paulo; BrasilFil: Tomachuk, Celia Regina. Instituto de Investigaciones Energéticas y Nucleares. San Pablo; BrasilFil: Costa, Ilda. Instituto de Investigaciones Energéticas y Nucleares. San Pablo; BrasilTrade Science inc2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/33500Palomino, Luis; Culcasi, José Daniel; Tomachuk, Celia Regina; Costa, Ilda; Di Sarli, Alejandro Ramón; Elsner, Cecilia Ines; et al.; Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel; Trade Science inc; Chemical Technology: An Indian Journal; 9; 3; 9-2014; 85-940974-7443CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.tsijournals.com/abstract/effect-of-oxidizing-concentration-on-the-corrosion-resistance-of-the-cerium-conversion-coating-on-galvanized-steel-1581.htmlinfo:eu-repo/semantics/altIdentifier/url/http://www.tsijournals.com/articles/effect-of-oxidizing-concentration-on-the-corrosion-resistance-of-the-cerium-conversion-coating-on-galvanized-steel.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:57:44Zoai:ri.conicet.gov.ar:11336/33500instacron: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 09:57:44.751CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| title |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| spellingShingle |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel Culcasi, José Daniel GALVANIZED STEEL Ce-BASED CONVERSION FILMS CORROSION EIS SEM EDXS XPS |
| title_short |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| title_full |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| title_fullStr |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| title_full_unstemmed |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| title_sort |
Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel |
| dc.creator.none.fl_str_mv |
Culcasi, José Daniel Elsner, Cecilia Ines Di Sarli, Alejandro Ramón Palomino, Luis Tomachuk, Celia Regina Costa, Ilda |
| author |
Culcasi, José Daniel |
| author_facet |
Culcasi, José Daniel Elsner, Cecilia Ines Di Sarli, Alejandro Ramón Palomino, Luis Tomachuk, Celia Regina Costa, Ilda |
| author_role |
author |
| author2 |
Elsner, Cecilia Ines Di Sarli, Alejandro Ramón Palomino, Luis Tomachuk, Celia Regina Costa, Ilda |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
GALVANIZED STEEL Ce-BASED CONVERSION FILMS CORROSION EIS SEM EDXS XPS |
| topic |
GALVANIZED STEEL Ce-BASED CONVERSION FILMS CORROSION EIS SEM EDXS XPS |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
| dc.description.none.fl_txt_mv |
Ce-based conversion films have been assessed as alternatives for replacement of Cr6+-based films,which have been forbidden for their toxicity and carcinogenic properties. However, corrosion protection associated with chromate films is difficult to achieve by other surface treatments. Experimental results have revealed that to obtain the highly satisfactory results provided by chromate-based conversion coatings, it is necessary to improve the anticorrosive properties of the new chromium-free coatings. The present work deals with the effect of the oxidant concentration in the cerium-based conversion baths on the corrosion resistance of the films deposited on galvanized steel. Electrogalvanized steel sheets were exposed to cerium chloride-based baths with different concentrations of oxidant for a minute. The surface of the treated samples was analyzed by XPS and SEM-EDXS, while its corrosion resistance was investigated using electrochemical tests (EIS) conducted in a 0.05 M NaCl solution and the impedance spectra evolution analyzed as a function of the exposure time. The results showed a direct relationship between oxidant concentration and corrosion resistance. When the oxidant concentration rose from2mL.L-1 to 12mL.L-1, the corrosion resistance increased about 5 times, and this was attributed to the decrease in the Ce3+/Ce4+ relationship of the conversion film. Fil: Culcasi, José Daniel. Universidad Nacional de La Plata; Argentina Fil: Elsner, Cecilia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Ópticas. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones Ópticas. Universidad Nacional de La Plata. Centro de Investigaciones Ópticas; Argentina. Universidad Nacional de La Plata; Argentina Fil: Di Sarli, Alejandro Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Ópticas. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones Ópticas. Universidad Nacional de La Plata. Centro de Investigaciones Ópticas; Argentina Fil: Palomino, Luis. Universidade de Sao Paulo; Brasil Fil: Tomachuk, Celia Regina. Instituto de Investigaciones Energéticas y Nucleares. San Pablo; Brasil Fil: Costa, Ilda. Instituto de Investigaciones Energéticas y Nucleares. San Pablo; Brasil |
| description |
Ce-based conversion films have been assessed as alternatives for replacement of Cr6+-based films,which have been forbidden for their toxicity and carcinogenic properties. However, corrosion protection associated with chromate films is difficult to achieve by other surface treatments. Experimental results have revealed that to obtain the highly satisfactory results provided by chromate-based conversion coatings, it is necessary to improve the anticorrosive properties of the new chromium-free coatings. The present work deals with the effect of the oxidant concentration in the cerium-based conversion baths on the corrosion resistance of the films deposited on galvanized steel. Electrogalvanized steel sheets were exposed to cerium chloride-based baths with different concentrations of oxidant for a minute. The surface of the treated samples was analyzed by XPS and SEM-EDXS, while its corrosion resistance was investigated using electrochemical tests (EIS) conducted in a 0.05 M NaCl solution and the impedance spectra evolution analyzed as a function of the exposure time. The results showed a direct relationship between oxidant concentration and corrosion resistance. When the oxidant concentration rose from2mL.L-1 to 12mL.L-1, the corrosion resistance increased about 5 times, and this was attributed to the decrease in the Ce3+/Ce4+ relationship of the conversion film. |
| publishDate |
2014 |
| dc.date.none.fl_str_mv |
2014-09 |
| 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/11336/33500 Palomino, Luis; Culcasi, José Daniel; Tomachuk, Celia Regina; Costa, Ilda; Di Sarli, Alejandro Ramón; Elsner, Cecilia Ines; et al.; Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel; Trade Science inc; Chemical Technology: An Indian Journal; 9; 3; 9-2014; 85-94 0974-7443 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/33500 |
| identifier_str_mv |
Palomino, Luis; Culcasi, José Daniel; Tomachuk, Celia Regina; Costa, Ilda; Di Sarli, Alejandro Ramón; Elsner, Cecilia Ines; et al.; Effect of oxidizing concentration on the corrosion resistance of the cerium conversion coating on galvanized steel; Trade Science inc; Chemical Technology: An Indian Journal; 9; 3; 9-2014; 85-94 0974-7443 CONICET Digital CONICET |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.tsijournals.com/abstract/effect-of-oxidizing-concentration-on-the-corrosion-resistance-of-the-cerium-conversion-coating-on-galvanized-steel-1581.html info:eu-repo/semantics/altIdentifier/url/http://www.tsijournals.com/articles/effect-of-oxidizing-concentration-on-the-corrosion-resistance-of-the-cerium-conversion-coating-on-galvanized-steel.pdf |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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openAccess |
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Trade Science inc |
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Trade Science inc |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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