Here presented research deals with carbon steel samples cathodically protected with Zinc anodes controlling applied potential with resistances in the window for oxygen limiting discharge (-850±50 mV Ag/AgCl). Characterization of biofouling effects was made through comparison between electrodes immersed in aged tank of natural seawater and a control tank filled with not biologically active seawater. Both tanks were exposed to sunlight photoperiod for several days during the summer 2008. Cathodic current behaviours were monitored during dark hours, sunlight hours and during sunlight interruptions via temporary tank coverage. Observed variations showed that the biolayer induces appreciable and diversified effects. Particularly, these are considered to be induced by active contribution (O2 production/consumption cycles) and passive contribution (O2 diffusion shielding from the bulk), in addition to the passive one performed by underlying calcareous deposit per se growing under cathodic polarization in seawaters.

Benedetti, A., Basso, D., Isella, M., Cassola, M., Faimali, M., Pavanello, G. (2010). Effect of biofouling on cathodically protected carbon steel in shallow seawaters exposed to sunlight photoperiod. In Proceedings of the European Corrosion Congress 2009 (EUROCORR 2009).

Effect of biofouling on cathodically protected carbon steel in shallow seawaters exposed to sunlight photoperiod

BASSO, DANIELA MARIA;
2010

Abstract

Here presented research deals with carbon steel samples cathodically protected with Zinc anodes controlling applied potential with resistances in the window for oxygen limiting discharge (-850±50 mV Ag/AgCl). Characterization of biofouling effects was made through comparison between electrodes immersed in aged tank of natural seawater and a control tank filled with not biologically active seawater. Both tanks were exposed to sunlight photoperiod for several days during the summer 2008. Cathodic current behaviours were monitored during dark hours, sunlight hours and during sunlight interruptions via temporary tank coverage. Observed variations showed that the biolayer induces appreciable and diversified effects. Particularly, these are considered to be induced by active contribution (O2 production/consumption cycles) and passive contribution (O2 diffusion shielding from the bulk), in addition to the passive one performed by underlying calcareous deposit per se growing under cathodic polarization in seawaters.
paper
cathodic protection, biofouling, biolayer
English
EUROCORR 2009
2009
Proceedings of the European Corrosion Congress 2009 (EUROCORR 2009)
9781615677962
apr-2010
open
Benedetti, A., Basso, D., Isella, M., Cassola, M., Faimali, M., Pavanello, G. (2010). Effect of biofouling on cathodically protected carbon steel in shallow seawaters exposed to sunlight photoperiod. In Proceedings of the European Corrosion Congress 2009 (EUROCORR 2009).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/20940
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