Biofilm formation on aluminum alloy 2024: A laboratory study
| Autor: | Freddy Boehmwald, Andres Abarzua, Jenny M. Blamey, Mamie Sancy, Martiza Páez, Nelson Vejar, Grace Gómez, M. Ignacio Azócar |
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| Rok vydání: | 2015 |
| Předmět: |
biology
General Chemical Engineering Metallurgy Alloy Biofilm food and beverages chemistry.chemical_element Bacillus subtilis engineering.material biology.organism_classification Electrochemistry Analytical Chemistry Corrosion chemistry Aluminium Bacillus circulans engineering Bacteria Nuclear chemistry |
| Zdroj: | Journal of Electroanalytical Chemistry. 737:212-217 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2014.08.015 |
| Popis: | In this paper we studied the influence of bacterial consortia on corrosion of fuel tanks of aircraft used often for pilot training. In the first part, we proceeded to the isolation and characterization of the consortia by DNA sequencing. The consortium was mainly constituted by two bacteria, which have a close affiliation to Bacillus subtilis and to Bacillus circulans . The substrate used in fuel tanks was an aluminum alloy 2024. Electrochemical measurements and morphological characterization were performed for different immersion times (1, 2, 3, 7 and 14 days) in sterile minimal salt medium (MSM) and in inoculated media (MSM + B. subtilis and MSM + consortia). For all immersion times, impedance diagrams showed a capacitive behavior characterized by a single constant time. Although for short exposure times, no corrosion process was evidenced, for longer exposure time, the resistance of the aluminum oxide ( R ox ) decreased markedly, indicating that a corrosion process was taking place. |
| Databáze: | OpenAIRE |
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