Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China.
Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China.
Bioelectrochemistry. 2023 Dec;154:108539. doi: 10.1016/j.bioelechem.2023.108539. Epub 2023 Aug 5.
Deterioration corrosion occurs between the external surface of oil pipelines and aerobic oil-degrading microorganisms in oil fields. Microorganisms with aerobic oil pollution remediation capabilities may catalyze more serious anaerobic microbial corrosion due to the carbon source supply. In this study, Acinetobacter soli strains were isolated from oil-contaminated environments, and their role in the deterioration corrosion behavior of X70 steel in an oil-water environment was investigated using the EDS multipoint scanning method. The presence of oil controls the deposition of carbon and phosphorus and diffusion of oxygen, leading to significant adhesion attraction and initial growth inhibition of biofilm on the metal surface. A. soli facilitates oxygen transfer and iron ion dissolution, thereby accelerating the pitting corrosion of X70 steel. This corrosion of the X70 steel, in turn, further accelerates the microbial degradation of oil, inhibiting the appearance of calcareous scale in the later stage of corrosion. The corrosion of X70 steel is influenced by microbial degradation, and the specific corrosion behaviors are related to the activity of A. soli in the petroleum environment. This study sheds light on the corrosion mechanisms of X70 steel by A. soli at different stages, providing insights into the interactions between microorganisms, oil pollution, and metal corrosion in oil fields.
在油田中，石油管道的外表面与需氧的石油降解微生物之间会发生恶化腐蚀。具有需氧石油污染修复能力的微生物由于碳源的供应，可能会催化更严重的厌氧微生物腐蚀。在这项研究中，从受污染的环境中分离出不动杆菌属菌株，并使用 EDS 多点扫描法研究了其在油水环境中对 X70 钢恶化腐蚀行为的作用。油的存在控制了碳和磷的沉积以及氧的扩散，从而导致生物膜在金属表面的显著附着吸引力和初始生长抑制。不动杆菌属菌株促进了氧气的传递和铁离子的溶解，从而加速了 X70 钢的点蚀腐蚀。X70 钢的这种腐蚀反过来又进一步加速了石油的微生物降解，抑制了腐蚀后期方解石层的出现。X70 钢的腐蚀受到微生物降解的影响，具体的腐蚀行为与石油环境中不动杆菌属菌株的活性有关。本研究阐明了不同阶段不动杆菌属菌株对 X70 钢的腐蚀机制，为深入了解油田中微生物、石油污染和金属腐蚀之间的相互作用提供了新的视角。
