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| Cachet, H.; Festy, Dominique; Folcher, G.; Mazeas, Florence; Tribollet, B.. |
| Biofouling reduction is a major problem for underwater instrumentation, involving optical measurements or viewing. This paper presents an effective window protection technique based on seawater electrolysis for producing active chlorine species. This is achieved by depositing a transparent conductive tin dioxide coating by spray pyrolysis. A number of laboratory and in situ experiments were performed in order to assess the effectiveness of this window protection technique. It was found that Sb doping was more efficient with respect to electrical energy management and long term SnO2 coating stability than the fluorine doping. In the present state of the art, biofouling prevention was proved to be effective over 5 months at least |
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| Ano: 2002 |
URL: https://archimer.ifremer.fr/doc/00480/59144/61772.pdf |
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| Festy, Dominique; Forest, Bertrand; Keddam, M.; Marchal, R.; Monfort Moros, N.; Tribollet, B.. |
| The biofilm developing on carbon steel surfaces in anaerobic condition may induce localised corrosion. To be able to better understand this type of biocorrosion, this paper presents a new electrochemical technique, which has been developed in collaboration between IFREMER and the Laboratory for liquid physic and electrochemistry. Focussed on local aspect of this phenomenon, the described technique enables surface current density mapping to be performed and anodic or cathodic zones to be identified. A double microelectrode probe is placed closed to the steel sample surface and potential difference between them is measured. This value is directly connected to ohmic drop within electrolyte and consequently, to local current. By scanning the substrate surface,... |
| Tipo: Text |
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| Ano: 2002 |
URL: https://archimer.ifremer.fr/doc/00480/59140/61768.pdf |
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