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Journal of Coatings Technology and Research
Erschienen in: Journal of Coatings Technology and Research 6/2010

01.11.2010

Corrosion protection of Mg alloys by cathodic electrodeposition coating pretreated with silane

verfasst von: Chaoyun Wu, Jin Zhang

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 6/2010

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Abstract

The corrosion resistance characteristics of three coatings on magnesium alloy AZ31—conventional paint with phosphate film, cathodic electrodeposition coating (E-coating), and E-coating pretreated with silane (Mg/silane/E-coating)—have been studied by means of electrochemical impedance spectroscopy (EIS) in a 3.5 wt% NaCl neutral aqueous solution and salt spray test using ASTM B117. Silane film was obtained by dipping AZ31 specimens in diluted hydroalcoholic silanic solutions and successively curing. It was found that the corrosion resistance of the Mg alloy with E-coating was superior to conventional paint and could be further enhanced with silane pretreatment as an interfacial film. The results of water volume fraction (Φsaturation) and diffusion coefficient (D) also indicated that the Mg/silane/E-coating possessed excellent compactness and corrosion resistance. A model of the corrosion mechanism for Mg/silane/E-coating has been presented through EIS analysis.
Vorheriger Artikel Penetration of 3-iodo-2-propynyl butylcarbamate (IPBC) in coniferous wood pre-treated with Physisporinus vitreus
Nächster Artikel Top coating of low-molecular weight polymer MALPB used for enhanced protection on anodized AZ31B Mg alloys

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Metadaten
Titel
Corrosion protection of Mg alloys by cathodic electrodeposition coating pretreated with silane
verfasst von
Chaoyun Wu
Jin Zhang
Publikationsdatum
01.11.2010
Verlag
Springer US
Erschienen in
Journal of Coatings Technology and Research / Ausgabe 6/2010
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-010-9260-7

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