Study of an Antarctic thermophilic consortium and its influence on the electrochemical behavior of aluminum alloy 7075-T6.,Bioelectrochemistry

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Study of an Antarctic thermophilic consortium and its influence on the electrochemical behavior of aluminum alloy 7075-T6.
Bioelectrochemistry ( IF 4.8 ) Pub Date : 2019-12-28 , DOI: 10.1016/j.bioelechem.2019.107450
Joaquín Atalah ₁ , Lotsé Blamey ₁ , Hans Köhler ₁ , Hilda M Alfaro-Valdés ₁ , Carlos Galarce ₂ , Claudia Alvarado ₃ , Mamié Sancy ₄ , Maritza Páez ₅ , Jenny M Blamey ₆

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Common alloys used for the manufacture of aircrafts are subject to different forms of environmental deterioration. A major one is corrosion, and there is a strong body of evidence suggesting that environmental microorganisms initiate and accelerate it. The development of an appropriate strategy to reduce this process depends on the knowledge concerning the factors involved in corrosion. In this work, a biofilm forming bacterial consortium was extracted in situ from the corrosion products formed in an aircraft exposed to Antarctic media. Two thermophilic bacteria, an Anoxybacillus and a Staphylococcus strain, were successfully isolated from this consortium. Two extracellular enzymes previously speculated to participate in corrosion, catalase and peroxidase, were detected in the extracellular fraction of the consortium. Additionally, we assessed the individual contribution of those thermophilic microorganisms on the corrosion process of 7075-T6 aluminum alloy, which is widely used in aeronautical industry, through electrochemical methods and surface analysis techniques.

中文翻译：

南极嗜热性财团的研究及其对7075-T6铝合金电化学行为的影响。

用于飞机制造的普通合金会遭受不同形式的环境恶化。主要的腐蚀是腐蚀，并且有大量证据表明环境微生物会引发并加速腐蚀。减少该过程的合适策略的开发取决于与腐蚀有关的因素的知识。在这项工作中，从暴露于南极介质的飞机中形成的腐蚀产物中就地提取了形成生物膜的细菌财团。从该财团成功地分离出了两种嗜热细菌，即嗜热芽孢杆菌和葡萄球菌菌株。在财团的细胞外部分中检测到两种先前推测参与腐蚀的细胞外酶，过氧化氢酶和过氧化物酶。此外，

更新日期：2019-12-29

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