Natuerliche Biozide und biozidfreie Mittel zur Bewuchshemmung, ihre Effektivitaet und Anwendung auf Schiffen im marinen Bereich. Teilvorhaben 1: Moeglichkeiten zur biozidfreien Konservierung technischer Produkte und Verfahren

Several different non-toxic antifouling techniques were tested. These techniques included non-stick coatings, biogenic biocides, and mechanical cleaning-cycles. In a preliminary study along the German coast it could be demonstrated that in all regions heavy marine macrofouling can occur. Field trials were conducted with coated panels in Cuxhaven, Meldorf, Kiel, and Schleimuende using stationary rafts and catamarans. Out of 13 non-stick coatings 4 turned out to be very effective. Out of 18 coatings with biogenic biocides some extracts from 3 macroalgae and a iodine coating showed a limited effectiveness. The application of an underwater tarpaulin revealed good results, but was uneasy to handle. Intermittent mechanical cleanings in 4 week cycles of an anticorrosive epoxy-coating was effective, only at low concentrations of cypris-larvae in the water. (orig.)SIGLEAvailable from TIB Hannover: RN 8422(1994,55) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Bonn (Germany)DEGerman