The positive impact of biomineralization for marine corrosion protection of AA5083 alloy

Marques, Maria João; Jaume, Julien; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Basseguy, Regine; Marcus, Philippe

http://hdl.handle.net/10400.9/4316

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Abstract(s)

ABSTRACT: This paper investigates, using surface characterisation techniques (SEM, XPS and ToF-SIMS), the impact of marine biological activity on AA5083 corrosion behaviour during seawater immersion. Different solar exposure (light vs. dark) results in distinct marine fouling development, influencing surface modifications. On the dark side, an Al/Mg oxide/hydroxide layer forms, allowing Cl - penetration. Pitting attack is observed after immersion. For the light side, a dual layer structure forms, with a hydrated Mg rich outer layer, showing barrier effect to Cl - penetration. No localized corrosion occurs. A comparison with abiotic conditions demonstrates the corrosion inhibiting effect of marine biological activity on AA5083.

Keywords

Aluminium alloys Marine corrosion inhibition Biomineralization Extracellular polymeric substances

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http://hdl.handle.net/10400.9/4316

Citation

Marques, M.J.F., Jaume, J.; Mercier, D., Seyeux, A., Zanna, S., Bassegur, R. & Marcus, P. (2024) The positive impact of biomineralization for marine corrosion protection of AA5083 alloy. In: Corrosion Science, 2024, vol. 233, article nº 112053. https://doi.org/10.1016/j.corsci.2024.112053