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Journal of Coatings Technology and Research
Erschienen in: Journal of Coatings Technology and Research 2/2017

04.01.2017

Photogenerated cathodic protection and invalidation of silane/TiO2 hybrid coatings

verfasst von: Weiwei Zhang, Hanlin Guo, Haiqing Sun, Rong-Chang Zeng

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 2/2017

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Abstract

Silane/TiO2 hybrid coatings were prepared on 304 stainless steel (304 SS) by a simple dipping method, where the silane is d-γ-methylacryloxy propyl trimethoxyl silane (CH2=C(CH3)COO(CH2)3Si(OCH3)3, MPMS). The photogenerated cathodic protection and invalidation of the hybrid coatings were evaluated by microstructure and electrochemical characterization. The coupling agent MPMS reduced the agglomeration of the nanosized TiO2 powders and promoted the adhesion of the coatings. Barrier protection of the coupled metal was promoted for the hybrid coatings in a short corrosion time. However, MPMS decreased the carrier concentration of the TiO2 electrode due to the large interface resistance. As a result, the corrosion potential shifted positively and the photogenerated cathodic protection decreased. In long-time corrosion, the hybrid coatings became invalid because of the accumulation of electropositive holes that may weaken the Ti–O bond and destroy the barrier effect.
Vorheriger Artikel Effect of polyaniline-modified glass fibers on the anticorrosion performance of epoxy coatings
Nächster Artikel Effect of sol–gel layers obtained from GLYMO/MTES mixtures on the delamination of a cataphoretic paint on AA1050

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Metadaten
Titel
Photogenerated cathodic protection and invalidation of silane/TiO2 hybrid coatings
verfasst von
Weiwei Zhang
Hanlin Guo
Haiqing Sun
Rong-Chang Zeng
Publikationsdatum
04.01.2017
Verlag
Springer US
Erschienen in
Journal of Coatings Technology and Research / Ausgabe 2/2017
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-016-9859-4

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