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Biocorrosion des aciers inoxydables en eaux de mer naturelles

Abstract : The present study deals with the electrochemical behavior and with the microbiological colonization of a 254SMO stainless steel (Fe-20Cr-18Ni-6Mo) immersed, either 10 days in a partially sterile natural seawater, or the same time in a non sterile natural seawater. Bacteria in seawater, and those forming the biofilm, are counted and identified during the two tests. Aerobic and anaerobic microorganisms are identified in two cases. Moreover, Ecorr was followed during the immersion. The values stay stable at about -0,10 V/SCE during immersion in sterilized seawater, whereas in non sterile seawater, Ecorr increases until +0,25 V/ECS after 10 days of immersion. Current density - potential curves, and Mott-Schottky plots, are also performed. Cathodic current densities and donors densities, are influenced by the presence or not of bacteria on the surface of the sample.
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Submitted on : Friday, January 8, 2016 - 4:07:06 PM
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V. l'Hostis, C. Dagbert, J. Galland, I. Dupont, M Roy, et al.. Biocorrosion des aciers inoxydables en eaux de mer naturelles. Matériaux & Techniques, EDP Sciences, 2002, 90 (9-10), pp.57-61. ⟨10.1051/mattech/200290090057⟩. ⟨hal-01253091⟩



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