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- The positive impact of biomineralization for marine corrosion protection of AA5083 alloyPublication . Marques, Maria João; Jaume, Julien; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Basseguy, Regine; Marcus, PhilippeABSTRACT: 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.
- Marine biomineralization for enhanced corrosion resistance: Insights from the ANR MICOATEC project [Poster]Publication . Marques, Maria João; Nkoua, C.; Jaume, Julien; Diderot, Anthony; Mercier, Dimitri; Seyeux, Antoine; Délia, Marie-Line; Silva, S. da; Fori, B.; Blanc, C.; Zanna, Sandrine; Marcus, Philippe; Basseguy, RegineABSTRACT: Concerns about marine pollution and ecological threats caused by traditional corrosion protection technologies have driven the development of new environmentally friendly anti-corrosion solutions. In recent years, it became clear that microorganisms have the potential to positively impact corrosion behavior, a phenomenon known as MICI (microbiologically influenced corrosion inhibition) [1,2]. Although research on MICI mechanisms is still in the beginning, two main mechanisms have been outlined: direct and indirect inhibition. In the first one, the microorganisms are responsible for the segregation of slow-release inhibitors or surfactants or consume oxygen, which affects the cathodic reaction process. The second one, indirect inhibition mechanism, is associated to the formation of a protective layer on the surface of the material due to metabolic activity of microorganisms. In this context, biomineralization attracted the attention of researchers as a solution to inhibit metal corrosion.
- Marine Microbial Induced Mineralization: Exploring Mechanisms for Bioinspired Anticorrosion solutionsPublication . Marques, Maria João; Zanna, Sandrine; Marcus, Philippe; Basseguy, RegineABSTRACT: In the field of corrosion, nature has proved to be a source of inspiration for developing new green protection concepts. Over the last decades, new emerging microbial-based technologies have been studied, based on the recognition that microorganisms can influence corrosion behaviour in an advantageous way, the so-called MICI (microbiologically influenced corrosion inhibition), opening different lines of research (1-5). In particular, the process of biomineralisation on the surface of materials was recently highlighted as a promising new environmentally-friendly approach to produce protective coatings.
- Exploring Marine Biomineralization on the Al-Mg Alloy as a Natural Process for In Situ LDH Growth to Improve Corrosion ResistancePublication . Marques, Maria João; Mercier, Dimitri; Seyeux, Antoine; Zanna, Sandrine; Tenailleau, Christophe; Duployer, Benjamin; Jeannin, Marc; Marcus, Philippe; Basséguy; BASSEGUY, RegineABSTRACT: This study provides a detailed characterization of the AA5083 aluminum alloy, surface, and interface over 6 months of immersion in seawater, employing techniques such as SEM/EDX, GIXRD, mu-Raman and XPS. The purpose was to evaluate the evolution of the biomineralization process that occurs on the Al-Mg alloy. By investigating the specific conditions that favor the in situ growth of layered double hydroxide (LDH) during seawater immersion as a result of biomineralization, this research provides insights into marine biomineralization, highlighting its potential as an innovative and sustainable strategy for corrosion protection.