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  Electrochemical electrolyte spreading studies of the protective properties of ultra-thin films on zinc galvanized steel

Posner, R., Fink, N., Wolpers, M., & Grundmeier, G. (2013). Electrochemical electrolyte spreading studies of the protective properties of ultra-thin films on zinc galvanized steel. Surface and Coatings Technology, 228, 286-295. doi:10.1016/j.surfcoat.2013.04.042.

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 Urheber:
Posner, Ralf1, Autor           
Fink, Nicole1, Autor           
Wolpers, Michael2, Autor           
Grundmeier, Guido3, Autor           
Affiliations:
1Christian Doppler Laboratory for Metal/Polymer Interfaces, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863353              
2Henkel AG and Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, Germany, ou_persistent22              
3University of Paderborn, Department of Technical and Macromolecular Chemistry, Warburger Str. 100, 33098 Paderborn, Germany, ou_persistent22              

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Schlagwörter: INDUCED ATMOSPHERIC CORROSION; OXIDE COVERED IRON; POLYMERIC COATINGS; POLYMER/OXIDE/METAL INTERFACES; MECHANISTIC APPROACH; TRANSPORT PROCESSES; ELECTROGALVANIZED STEEL; HYDRATED IONS; PART 3; DELAMINATIONMaterials Science; Physics; Conversion coating; Reactive electrolyte spreading; Accelerated corrosion testing; Cathodic delamination; Zinc galvanized steel;
 Zusammenfassung: Reactive electrolyte spreading along the surfaces of different conversion films on zinc galvanized steel in humid air was monitored visually and with a height-regulated scanning Kelvin Probe. Electrochemical impedance spectroscopy and current density-potential curves revealed that decelerated spreading kinetics are connected with increasing pore resistances of the pre-treatment layers and decreasing oxygen reduction current densities in the electron transfer controlled potential region. After a few days the progress ranking of electrolyte spreading along uncoated conversion films reflected the progress tendencies of cathodic delamination observed on epoxy coated conversion layers after long-time exposure to the same corrosive environment Such correlation was not discovered for pre-treatment films that do not provide relevant electrochemical barrier properties. The results suggest that oxygen reduction driven electrolyte wetting is an option for accelerated performance testing of anticorrosive ultra-thin films on metal substrates that can be subject to cathodic delamination. (C) 2013 Elsevier B.V. All rights reserved.

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Sprache(n): eng - English
 Datum: 2013-08
 Publikationsstatus: Erschienen
 Seiten: 10
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000321797100035
DOI: 10.1016/j.surfcoat.2013.04.042
 Art des Abschluß: -

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Titel: Surface and Coatings Technology
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: Lausanne : Elsevier
Seiten: - Band / Heft: 228 Artikelnummer: - Start- / Endseite: 286 - 295 Identifikator: ISSN: 0257-8972
CoNE: https://pure.mpg.de/cone/journals/resource/954925496044