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Proceedings Paper

Chemically activated nanodiamonds for aluminum alloy corrosion protection and monitoring
Author(s): Inga Hannstein; Anne-Katrin Adler; Victoria Lapina; Vladimir Osipov; Jörg Opitz; Jürgen Schreiber; Norbert Meyendorf
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Paper Abstract

In the present study, a smart coating for light metal alloys was developed and investigated. Chemically activated nanodiamonds (CANDiT) were electrophoretically deposited onto anodized aluminum alloy AA2024 substrates in order to increase corrosion resistance, enhance bonding properties and establish a means of corrosion monitoring based on the fluorescence behavior of the particles. In order to create stable aqueous CANDiT dispersions suitable for electrophoretic deposition, mechanical milling had to be implemented under specific chemical conditions. The influence of the CANDiT volume fraction and pH of the dispersion on the electrochemical properties of the coated samples was investigated. Linear voltammetry measurements reveal that the chemical characteristics of the CANDiT dispersion have a distinct influence on the quality of the coating. The fluorescence spectra as well as fluorescence excitation spectra of the samples show that corrosion can be easily detected by optical means. Furthermore, an optimization on the basis of "smart" - algorithms for the data processing of a surface analysis by the laser-speckle-method is presented.

Paper Details

Date Published: 7 April 2009
PDF: 8 pages
Proc. SPIE 7293, Smart Sensor Phenomena, Technology, Networks, and Systems 2009, 72930O (7 April 2009); doi: 10.1117/12.815486
Show Author Affiliations
Inga Hannstein, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Anne-Katrin Adler, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Victoria Lapina, Institute of Physics (Belarus)
Vladimir Osipov, Institute of Physics (Belarus)
Jörg Opitz, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Jürgen Schreiber, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Norbert Meyendorf, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)

Published in SPIE Proceedings Vol. 7293:
Smart Sensor Phenomena, Technology, Networks, and Systems 2009
Norbert G. Meyendorf; Kara J. Peters; Wolfgang Ecke, Editor(s)

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