生物膜
腐蚀
材料科学
胞外聚合物
人工海水
细菌
生物污染
碳钢
海水
海洋噬菌体
环境友好型
杀生物剂
冶金
纳米技术
化学工程
有机化学
化学
生物
生态学
工程类
膜
生物化学
遗传学
作者
Tao Liu,Zhangwei Guo,Zhenshun Zeng,Na Guo,Yanhua Lei,Tong Liu,Shibin Sun,Xueting Chang,Yansheng Yin,Pengxia Wang
标识
DOI:10.1021/acsami.8b14991
摘要
Steel corrosion is a global problem in marine engineering. Numerous inhibitory treatments have been applied to mitigate the degradation of metallic materials; however, they typically have a high cost and are not environmental friendly. Here, we present a novel and "green" approach for the protection of steel by a marine bacterium Pseudoalteromonas lipolytica. This approach protects steel from corrosion in seawater via the formation of a biofilm followed by the formation of an organic-inorganic hybrid film. The hybrid film is composed of multiple layers of calcite and bacterial extracellular polymeric substances, exhibiting high and stable barrier protection efficiency and further providing an in situ self-healing activity. The process involving the key transition from biofilm to biomineralized film is essential for its lasting anticorrosion activity, which overcomes the instability of biofilm protection on corrosion. Therefore, this study introduces a new perspective and an option for anticorrosion control in marine environments.
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