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Improvement of the electrochemical behaviour of Zn-electroplated steel using regenerated Cr(III) passivation baths

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Improvement of the electrochemical behaviour of Zn-electroplated steel using regenerated Cr(III) passivation baths

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dc.contributor.author	Garcia-Anton, Jose
dc.contributor.author	Fernández Domene, Ramón Manuel
dc.contributor.author	Sánchez-Tovar, Rita
dc.contributor.author	Escrivà-Cerdán, C.
dc.contributor.author	Leiva-García, Rafael
dc.contributor.author	García, V.
dc.contributor.author	Urtiaga, A.
dc.date.accessioned	2021-01-08T10:45:33Z
dc.date.available	2021-01-08T10:45:33Z
dc.date.issued	2014
dc.identifier.citation	García-Antón, Jose Fernández Domene, Ramón Manuel Sánchez-Tovar, Rita Escrivà-Cerdán, C. Leiva-García, Rafael García, V. Urtiaga, A. 2014 Improvement of the electrochemical behaviour of Zn-electroplated steel using regenerated Cr(III) passivation baths Chemical Engineering Science 111 402 409
dc.identifier.uri	https://hdl.handle.net/10550/76904
dc.description.abstract	Conversion coatings based on trivalent chromium are more sensitive to the presence of zinc and iron impurities than the chromate formulations. This fact contributes to a decrease in the quality of passivation and to the generation of a significant amount of hazardous liquid waste. Recently, a new eco-innovative process based on Emulsion Pertraction Technology (EPT) is being implemented at industrial scale for selectively removing Zn and Fe from spent passivation baths in order to enhance the lifetime of the Cr (III) baths. In this study, the effect of Zn and Fe removal on the electrochemical behaviour of Zn-electroplated steel samples was evaluated by means of polarisation curves and electrochemical impedance spectroscopy measurements at open circuit potential conditions in 3.5 g/L NaCl solutions. The main objective was to assess the benefits brought by EPT using electrochemical methods. Cr (III) passivation baths regenerated using the EPT process have been compared to the bath used in a local industry as well as to fresh and spent baths. According to the results, the samples passivated in the EPT regenerated bath showed a significant improvement in their electrochemical behaviour compared to the samples passivated in the spent baths. This study concluded the suitability of EPT for regenerating Cr (III) passivation baths.
dc.language.iso	eng
dc.relation.ispartof	Chemical Engineering Science, 2014, vol. 111, p. 402-409
dc.subject	Electroquímica
dc.subject	Acer Corrosió
dc.title	Improvement of the electrochemical behaviour of Zn-electroplated steel using regenerated Cr(III) passivation baths
dc.type	journal article	es_ES
dc.date.updated	2021-01-08T10:45:33Z
dc.identifier.doi	10.1016/j.ces.2014.03.005
dc.identifier.idgrec	140755
dc.rights.accessRights	open access	es_ES