Distinctive colonization of Bacillus sp. bacteria and the influence of the bacterial biofilm on electrochemical behaviors of aluminum coatings
Distinctive colonization of Bacillus sp. bacteria and the influence of the bacterial biofilm on electrochemical behaviors of aluminum coatings
复制标题
芽孢杆菌属的独特定殖。
DOI：
10.1016/j.colsurfb.2016.05.075
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Hua Li
中科院分区：
文献类型：
--
作者：
Leila Abdoli;Xinkun Suo;Hua Li
生物膜的形成是生物污损发展的关键，对海洋结构物的腐蚀起着至关重要的作用。在这里，我们报告的附着行为的Bacillussp。在人工海水中，不锈钢和热喷涂铝涂层上的细菌和随后的细菌生物膜的形成。在细菌生物膜生长的早期阶段，定植细菌加速了钢板的腐蚀，并显著提高了铝涂层的耐蚀性能。培养7天后，在钢上形成的生物膜是不均匀的，而在铝涂层上表现出均匀的特征。原子力显微镜检查揭示了与显着粗糙表面相关的钢板上形成局部点蚀的开始。电化学测试结果表明，生物膜对海洋结构物腐蚀行为的影响不是由生物膜本身决定的，而是生物膜和基底材料的物理化学特性共同作用的结果。
Formation of biofilm is usually essential for the development of biofouling and crucially impacts the corrosion of marine structures. Here we report the attachment behaviors ofBacillussp. bacteria and subsequent formation of bacterial biofilm on stainless steel and thermal sprayed aluminum coatings in artificial seawater. The colonized bacteria accelerate the corrosion of the steel plates, and markedly enhance the anti-corrosion performances of the Al coatings in early growth stage of the bacterial biofilm. After 7 days incubation, the biofilm formed on the steel is heterogeneous while exhibits homogeneous feature on the Al coating. Atomic force microscopy examination discloses inception of formation of local pitting on steel plates associated with significantly roughened surface. Electrochemical testing suggests that the impact of the bacterial biofilm on the corrosion behaviors of marine structures is not decided by the biofilm alone, it is instead attributed to synergistic influence by both the biofilm and physicochemical characteristics of the substratum materials.