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Corrosion protection of pure aluminium and aluminium alloy (AA7075) in salt solution with silane-based sol-gel coatings

Younis, A. A. and Ensinger, Wolfgang and El-Sabbah, M. M. B. and Holze, R. :
Corrosion protection of pure aluminium and aluminium alloy (AA7075) in salt solution with silane-based sol-gel coatings.
[Online-Edition: http://onlinelibrary.wiley.com/doi/10.1002/maco.201206691/ab...]
In: Materials and Corrosion, 64 (4) pp. 276-283.
[Article] , (2013)

Official URL: http://onlinelibrary.wiley.com/doi/10.1002/maco.201206691/ab...

Abstract

Sol-gel films of tetraethoxysilane (TEOS), phenyltriethoxysilane (PTES) and phenyltrimethoxysilane (PTMS) were prepared on aluminium and aluminium alloy AA7075 and characterised. The corrosion inhibition properties of uncoated and coated specimens were evaluated with potentiodynamic polarisation scan, linear polarisation resistance and open circuit potential measurements. With scanning electron microscopy and optical microscopy effects of the sol-gel coating were shown. Weight loss measurements were performed at different pH-values. More hydrophobic coatings as PTMS show a considerably better corrosion inhibition capacity as compared to the capacity provided by less hydrophobic ones as TEOS and PTES.

Item Type: Article
Erschienen: 2013
Creators: Younis, A. A. and Ensinger, Wolfgang and El-Sabbah, M. M. B. and Holze, R.
Title: Corrosion protection of pure aluminium and aluminium alloy (AA7075) in salt solution with silane-based sol-gel coatings
Language: English
Abstract:

Sol-gel films of tetraethoxysilane (TEOS), phenyltriethoxysilane (PTES) and phenyltrimethoxysilane (PTMS) were prepared on aluminium and aluminium alloy AA7075 and characterised. The corrosion inhibition properties of uncoated and coated specimens were evaluated with potentiodynamic polarisation scan, linear polarisation resistance and open circuit potential measurements. With scanning electron microscopy and optical microscopy effects of the sol-gel coating were shown. Weight loss measurements were performed at different pH-values. More hydrophobic coatings as PTMS show a considerably better corrosion inhibition capacity as compared to the capacity provided by less hydrophobic ones as TEOS and PTES.

Journal or Publication Title: Materials and Corrosion
Volume: 64
Number: 4
Uncontrolled Keywords: Aluminium, aluminium alloy (AA7075), phenyltriethoxysilane, phenyltrimethoxysilane, sol-gel coating, tetraethoxysilane
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences
Date Deposited: 02 May 2013 11:10
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/maco.201206691/ab...
Identification Number: doi:10.1002/maco.201206691
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