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Electrodeposition of zinc–silica composite coatings : challenges in incorporating functionalized silica particles into a zinc matrix

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Khan, Tabrisur Rahman, Erbe, Andreas, Auinger, Michael, Marlow, Frank and Rohwerder, Michael (2011) Electrodeposition of zinc–silica composite coatings : challenges in incorporating functionalized silica particles into a zinc matrix. Science and Technology of Advanced Materials, Volume 12 (Number 5). 055005. Article number 055005. doi:10.1088/1468-6996/12/5/055005

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Official URL: http://dx.doi.org/10.1088/1468-6996/12/5/055005

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Abstract

Zinc is a well-known sacrificial coating material for iron and co-deposition of suitable particles is of interest for further improving its corrosion protection performance. However, incorporation of particles that are well dispersible in aqueous electrolytes, such as silica particles, is extremely difficult. Here, we report a detailed study of Zn–SiO2 nanocomposite coatings deposited from a zinc sulfate solution at pH 3. The effect of functionalization of the silica particles on the electro-codeposition was investigated. The best incorporation was achieved for particles modified with SiO2–SH, dithiooxamide or cysteamine; these particles have functional groups that can strongly interact with zinc and therefore incorporate well into the metal matrix. Other modifications (SiO2–NH3+, SiO2–Cl and N,N-dimethyldodecylamine) of the silica particles lead to adsorption and entrapment only.

Item Type: Journal Article
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title: Science and Technology of Advanced Materials
Publisher: Institute of Physics Publishing Ltd.
ISSN: 1468-6996
Official Date: October 2011
Dates:
DateEvent
October 2011Published
14 September 2011Available
26 July 2011Accepted
9 May 2011Submitted
Volume: Volume 12
Number: Number 5
Page Range: 055005
Article Number: Article number 055005
DOI: 10.1088/1468-6996/12/5/055005
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
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