Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 46, Pages 40317-40327Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b14991
Keywords
Pseudoalteromonas lipolytica; biomineralization; anticorrosion; steel; marine environment
Funding
- National Basic Research Program of China [2017YFC0506303, 2014CB643306, 2016YFB0300702, 2018YFC1406500]
- National Science Foundation of China [31625001]
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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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