Marine bacteria inhibit corrosion of steel via synergistic biomineralization  

作　　者：Na Guo Yanan Wang Xinrui Hui Qianyu Zhao Zhenshun Zeng Shuai Pan Zhangwei Guo Yansheng Yin Tao Liu 

机构地区：[1]College of Ocean Science and Engineering,Instituce of Marine Materials Science and Engineering,Shanghai Maritime University.Shanghai 201306,China [2]Key Laboratory for Water Quality and Conservation of the Pearl River Delta,School of Environmental Science and Engineering,Guangzhou University,Guangzhou 510006,China [3]Key Laboratory of Tropical Marine Bio-resources and Ecology,the South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China

出　　处：《Journal of Materials Science & Technology》2021年第7期82-90,共9页材料科学技术（英文版）

基　　金：financially supported by the National Basic Research Program of China (No. 2016YFB0300700);the National Natural Science Foundation of China (Nos. 41976039, 41606179 and 51901127);the Shanghai Natural Science Fund (No. 19ZR1422100);the China Postdoctoral Science Foundation (No. 2018M641980)。

摘　　要：Metal corrosion often results in incalculable economic loss and significant safety hazards. Although numerous traditional methods have been used to mitigate the issue, such as coating and corrosion inhibitors, they are environmentally unfriendly and difficult to maintain. Therefore, in this study, an environmental approach was taken to protect steels from corrosion in a multi-species bacterial environment via synergistic biomineralization. The marine bacterium Pseudoalteromonas lipolytica mixed with Bacillus subtilis or Pseudomonas aeruginosa strains offered extraordinary corrosion protection for steel.The surface characterization and electrochemical tests showed that the biomineralized film generated by the mixed bacteria was more compact and protective than that induced by a single bacterium. Herein,we found that the synergistic mechanisms were rather different for the different bacterial groups. For Pseudoalteromonas lipolytica and Bacillus subtilis group, the related mechanisms were due to the increase of pH in the medium, secretion of carbonic anhydrase. As for Pseudoalteromonas lipolytica and Pseudomonas aeruginosa group, the synergistic mechanism was attributed to the inhibiting corrosive bacteria in biofilm by the growth advantage of Pseudoalteromonas lipolytica. Therefore, this study may introduce a new perspective for future use of biomineralization in a real marine environment.

关 键 词：Bacillus subtilis Pseudoalteromonas lipolytica Pseudomonas aeruginosa Biomineralized film ANTICORROSION Steel 

分 类 号：TG174[金属学及工艺—金属表面处理]