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Corrosion performance of thin amorphous carbon films on aluminum formed by ion beam-based coating techniques

Ensinger, W. and Lensch, O. and Matsutani, T. and Kiuchi, M. (2005):
Corrosion performance of thin amorphous carbon films on aluminum formed by ion beam-based coating techniques.
In: Surface and Coatings Technology, Elsevier, pp. 231-235, 196, (1-3), ISSN 02578972, [Online-Edition: http://dx.doi.org/10.1016/j.surfcoat.2004.08.182],
[Article]

Abstract

Thin amorphous carbon films were deposited onto aluminum samples at ambient temperature by ion beam-assisted evaporation and by ion beam sputter deposition. Their corrosion protection effect in sodium chloride solution where aluminum suffers from pitting corrosion was tested by means of electrochemical polarization measurements. The results showed that in case of ion beam-assisted deposition at a given ion irradiation intensity, the corrosion protection effect is strongly influenced by the deposition rate. There exists an optimal rate corresponding to a certain ratio of deposited atoms to impinging ions. In case of ion beam sputter deposition, it turned out that lower energies and lower currents of the sputtering ions were more favourable for corrosion protection. A comparison of the results of both techniques shows that under the present experimental conditions with sputter deposited films, a better corrosion protection performance could be achieved than with those formed by evaporation under ion assist.

Item Type: Article
Erschienen: 2005
Creators: Ensinger, W. and Lensch, O. and Matsutani, T. and Kiuchi, M.
Title: Corrosion performance of thin amorphous carbon films on aluminum formed by ion beam-based coating techniques
Language: English
Abstract:

Thin amorphous carbon films were deposited onto aluminum samples at ambient temperature by ion beam-assisted evaporation and by ion beam sputter deposition. Their corrosion protection effect in sodium chloride solution where aluminum suffers from pitting corrosion was tested by means of electrochemical polarization measurements. The results showed that in case of ion beam-assisted deposition at a given ion irradiation intensity, the corrosion protection effect is strongly influenced by the deposition rate. There exists an optimal rate corresponding to a certain ratio of deposited atoms to impinging ions. In case of ion beam sputter deposition, it turned out that lower energies and lower currents of the sputtering ions were more favourable for corrosion protection. A comparison of the results of both techniques shows that under the present experimental conditions with sputter deposited films, a better corrosion protection performance could be achieved than with those formed by evaporation under ion assist.

Journal or Publication Title: Surface and Coatings Technology
Volume: 196
Number: 1-3
Publisher: Elsevier
Uncontrolled Keywords: Ion beam assisted deposition, Corrosion, Amorphous carbon, Aluminum
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: 16 Nov 2012 12:22
Official URL: http://dx.doi.org/10.1016/j.surfcoat.2004.08.182
Identification Number: doi:10.1016/j.surfcoat.2004.08.182
Funders: This work has been supported by Deutsche Forschungsgemeinschaft.
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