Reduction of biofilm accumulation by constant and alternating potentials in static and dynamic field experiments

Schwarze, J. and Koc, J. and Koschitzki, F. and Gardner, H. and Hunsucker, K.Z. and Swain, G.W. and Rosenhahn, A.

Volume: Pages:
DOI: 10.1080/08927014.2022.2027923
Published: 2022

The application of electric fields to conductive coatings is an environmentally friendly way to reduce biofilm formation. In particular alternating potentials (APs) have received increasing attention in recent studies. Here, an electrochemical rotating disk setup for dynamic field exposure experiments was developed to study how APs alter the attachment of fouling organisms in a multispecies ocean environment. A specific focus of the device design was proper integration of the potentiostat in the strongly corroding saltwater environment. The effect of APs on the accumulation of fouling organisms in short term field exposures was studied. Potentials on conductive gold surfaces were periodically switched between −0.3 V and 0.3 V or between −0.8 V and 0.6 V at a frequency of 0.5 Hz. APs were capable of significantly reducing the attachment of marine fouling organisms compared with the conductive samples immersed at open circuit potentials. © 2022 Informa UK Limited, trading as Taylor & Francis Group.

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