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Effect of a Bacterial Consortium on Passivation Property of 2024 Aluminum Alloy

机译：细菌财团对2024铝合金钝化性能的影响

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摘要

A bacterial consortium was recollected from corrosion products formed on a vertical fin of a militaryhelicopter exposed to Antarctic environment for 4 years. For the identification and characterization ofthe consortium, DNA sequencing was performed showing that the consortium was mainly composedby three strains. Two of the strains showed a close affiliation to Bacillus toyonensis andStaphylococcus aureus. However, the third strain studied did not show affiliation by 16S rRNAanalysis to any genus so far described. Additionally, morphological and electrochemical studies of analuminum 2024-T3 alloy prior and after exposure to a sterile and inoculated minimal salt medium at 4?C were carried out by using scanning electron microscope, open circuit potential and electrochemicalimpedance spectroscopy. The experimental results revealed that steady-state properties of the passivefilm were modified by the bacterial consortium and isolates.
机译：从暴露于南极环境4年的军用直升机的垂直鳍上形成的腐蚀产物中收集了一个细菌财团。为了鉴定该财团，进行了DNA测序，结果表明该财团主要由三种菌株组成。其中两个菌株显示了与芽孢杆菌和金黄色葡萄球菌的紧密联系。但是，到目前为止，所研究的第三种菌株均未通过16S rRNA分析显示与任何属属。另外，通过使用扫描电子显微镜，开路电势和电化学阻抗谱，对2024-T3铝合金在4℃下暴露于无菌和接种的最小盐介质之前和之后的形态和电化学研究。实验结果表明，被动膜的稳态特性被细菌聚生体和分离物修饰。

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