Chemically activated nanodiamonds for aluminum alloy corrosion protection and monitoring

Inga Hannstein*, Anne Katrin Adler, Victoria Lapina, Vladimir Osipov, Jorg Opitz, Jurgen Schreiber, Norbert Meyendorf

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish
Article number72930O
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 7 Apr 2009
EventSmart Sensor Phenomena, Technology, Networks, and Systems 2009 - San Diego, CA, United States
Duration: 9 Mar 200911 Mar 2009


  • Aluminum alloy
  • Corrosion monitoring
  • Corrosion protection
  • Nanodiamonds


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