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Testing for microbial corrosion in natural waters


The device is an autonomous acquisition system for electrochemical corrosion data of material samples. Exposed to a natural water body, the data provide information on the corrosion behaviour of the tested materials including the microbial influences.


The corrosiveness of natural water for metallic materials is not only determined by the chemical composition, it is also influenced by microbial activity. Microbially Influenced Corrosion (MIC) may lead to unexpected corrosion damages in technical systems like hydropower plants, pipes, pumps, or heat exchangers. Assessing the MIC risk from water samples is very limited, as are laboratory tests lacking the complexity of the natural environment.

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Microbially Influenced Corrosion Risk Assessment buoy (MICRA-buoy) is a device which is placed in the water body of interest for a limited time (few weeks, typically). It carries specimens of metallic materials, which are connected to an integrated acquisition system for electrochemical data. After exposition, data evaluation provides information on the risk of MIC, and the biofilm on the specimens may be investigated.


  • Direct assessment of corrosion relevant electrochemical data
  • in the original environment with freely selectable materials
  • generating authentic biofilm


Microbial corrosion risk assessment / testing, in natural waters, for hydro-power and related projects, for failure analysis, for research

Mag. Dr. Angelika Valenta
+43 1 58801 41538
Karlsplatz 13
1040 Wien




microbial corrosion, natural water, fresh water hydropower, wells, water works, cooling water

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TechnologieAllianz e. V.
Christiane Bach-Kaienburg

c/o PROvendis GmbH
Schloßstr. 11-15
D-45468 Mülheim an der Ruhr