The corrosion behavior of aluminium-magnesium alloy in natural seawater: effects of the biological activity [Resumo]

ABSTRACT: Concerning the corrosion in seawater environments, microorganisms can cause corrosion (Microbiologically Influenced Corrosion - MIC) [1], but also inhibit it or protect against it, a process known as MIC Inhibition (MICI) [2-3]. Corrosion studies of Al-Mg alloys of the 5XXX series, widely used in the shipbuilding industry, requires wider comprehension regarding the impact of the microbial activity [4-7]. Recent studies indicate that the biological activity tends to mitigate the Al alloy corrosion processes [8-11]. The objective of the present study is to assess the influence of natural seawater and the related biological activity on the resistance of the AA5083 Al-Mg alloy by the means of immersion experiments in natural (biotic) vs control (abiotic) seawater. Ennoblement of the open circuit potential (OCP) on Stainless steel (SS) probes was used to monitor the biofilm growth [12].

Keywords

Materials Aluminium alloys Corrosion Seawater

URI

http://hdl.handle.net/10400.9/4376

Citation

Marques, M.J.F., Benedandti, A., Castelli, F., Delucchi, M., Faimali, M., Delsante, S., Valenza, F., Garaventa, F., Pavanello, G., Losurdo, M. & Basséguy, R. (2024) The corrosion behavior of aluminium-magnesium alloy in natural seawater: effects of the biological activity. In: AMPP2024 - 3rd Conference & Expo for Corrosion Prevention, Génova, Italy, 9-11 June, 2024