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Structural and electrochemical characterization of zirconium and silicon based sol-gel coatings for corrosion protection

Ochs, C. J. and Sittner, Falk and Ugas-Carrion, Ruperto and Yekehtaz, Mehdi and Flege, Stefan and Ensinger, Wolfgang :
Structural and electrochemical characterization of zirconium and silicon based sol-gel coatings for corrosion protection.
[Online-Edition: http://www.researchtrends.net/tia/abstract.asp?in=0&vn=13&ti...]
In: Current Topics in Electrochemistry, 13 pp. 59-65.
[Article] , (2008)

Official URL: http://www.researchtrends.net/tia/abstract.asp?in=0&vn=13&ti...

Abstract

Oxide thin films based on the sol-gel technique are well-known for a number of favourable features, such as high hardness and chemical inertness, however, they tend to form holes and cracks. As they are chemically highly stable, they should be well-suited for corrosion protection. The drawback is that for this purpose, cracks might be detrimental. The study aimed at investigating the properties of sol-gel based oxide films for their corrosion protection ability. Thin films of zirconium oxide, partially mixed with silicon oxide, were prepared by spin depositing sols of zirconium tetrapropoxide and phenyltriethoxy silane onto silicon wafers and iron samples. The samples were heat treated to form the respective oxide coatings. Film thickness was determined as a function of spin speed, spin time, drying time and sintering temperature. The so-called critical film thickness for crack formation was determined. The films were characterized with scanning electron microscopy (SEM), IR spectroscopy, and secondary ion mass spectrometry (SIMS). Electrochemical measurements (cyclic voltammetry) were carried out to find a relation between film parameters and corrosion protection potential of the various coatings. The films showed a similar quality in corrosion protection ability as comparable films formed by physical vapour deposition.

Item Type: Article
Erschienen: 2008
Creators: Ochs, C. J. and Sittner, Falk and Ugas-Carrion, Ruperto and Yekehtaz, Mehdi and Flege, Stefan and Ensinger, Wolfgang
Title: Structural and electrochemical characterization of zirconium and silicon based sol-gel coatings for corrosion protection
Language: English
Abstract:

Oxide thin films based on the sol-gel technique are well-known for a number of favourable features, such as high hardness and chemical inertness, however, they tend to form holes and cracks. As they are chemically highly stable, they should be well-suited for corrosion protection. The drawback is that for this purpose, cracks might be detrimental. The study aimed at investigating the properties of sol-gel based oxide films for their corrosion protection ability. Thin films of zirconium oxide, partially mixed with silicon oxide, were prepared by spin depositing sols of zirconium tetrapropoxide and phenyltriethoxy silane onto silicon wafers and iron samples. The samples were heat treated to form the respective oxide coatings. Film thickness was determined as a function of spin speed, spin time, drying time and sintering temperature. The so-called critical film thickness for crack formation was determined. The films were characterized with scanning electron microscopy (SEM), IR spectroscopy, and secondary ion mass spectrometry (SIMS). Electrochemical measurements (cyclic voltammetry) were carried out to find a relation between film parameters and corrosion protection potential of the various coatings. The films showed a similar quality in corrosion protection ability as comparable films formed by physical vapour deposition.

Journal or Publication Title: Current Topics in Electrochemistry
Volume: 13
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 17 Mar 2010 15:51
Official URL: http://www.researchtrends.net/tia/abstract.asp?in=0&vn=13&ti...
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