Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China.
Electrobiomaterials Institute, Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China.
ACS Appl Mater Interfaces. 2021 Oct 6;13(39):47272-47282. doi: 10.1021/acsami.1c14746. Epub 2021 Sep 27.
The development of environmentally friendly and sustainable corrosion protection technologies is a longstanding yet difficult problem, especially for the marine environment. The utilization of living biofilms isolated from local environments is an effective strategy for infrastructure protection. In this study, three aerobic marine bacteria, D-6, W-4, and sp. Y-6, with strong biofilm-forming abilities were isolated and evaluated for the corrosion protection of X80 carbon steel. The corrosion inhibitory effect of the bacteria was found to be closely related to their biofilm-forming abilities. This conclusion was corroborated by biofilm characterization, electrochemical tests, weight loss analysis, and corrosion product analysis. Moreover, secreted extracellular polymeric substances were identified to play significant roles in corrosion inhibition. Herein, we proposed a novel, eco-friendly, and cost-effective method for corrosion protection of carbon steels in the marine environment, providing guiding principles for identifying corrosion inhibitory bacteria from the local marine environment.
开发环保且可持续的腐蚀防护技术是一个长期存在但具有挑战性的问题，尤其是在海洋环境中。利用从当地环境中分离出来的具有生物活性的生物膜是基础设施保护的有效策略。在这项研究中，我们分离并评估了三种具有较强生物膜形成能力的好氧海洋细菌（D-6、W-4 和 sp. Y-6），以保护 X80 碳钢免受腐蚀。研究发现，细菌的腐蚀抑制效果与其生物膜形成能力密切相关。这一结论通过生物膜特性表征、电化学测试、失重分析和腐蚀产物分析得到了证实。此外，我们还发现，分泌的胞外聚合物在腐蚀抑制中发挥了重要作用。在此，我们提出了一种在海洋环境中保护碳钢的新型、环保且经济有效的方法，为从当地海洋环境中识别具有腐蚀抑制作用的细菌提供了指导原则。
