Sun Ming, Wang Xinhua, Cui Wei, Shi Chuntao
College of Mechanical & Energy Engineering, Beijing University of Technology, Beijing 100124, China.
China Special Equipment Inspection & Research Institute, Beijing 100129, China.
Microorganisms. 2025 Feb 24;13(3):500. doi: 10.3390/microorganisms13030500.
Microorganisms are often observed in the produced medium during the oil and gas extraction process. Corrosion caused by CO and microorganisms is found on the inner wall of the metal gathering pipelines during the production process. In order to explore the corrosion characteristics of L245 materials under the combined action of sulfate-reducing bacteria (SRB) and CO, a CO-SRB corrosion system was established in this paper. Experimental research on corrosion rate, surface morphology, and corrosion products analysis was conducted. The effect of temperature on the corrosion of SRB while CO is saturated and the partial pressure is 0.06 MPa was investigated. It was observed that the corrosion is more serious in the CO-SRB corrosion system than that in the single CO corrosion system. At 40 °C, the corrosion caused by CO is 0.0597 mm/a, and the corrosion caused by SRB is 0.0766 mm/a. So, more attention should be paid to the corrosion status of gathering pipelines with microorganisms. Further, the activity of SRB is stronger when the temperature of the medium is 40 °C, and corrosion on L245 samples is more obvious under the experimental conditions in this article. In order to reduce the corrosion damage of metal pipelines with microorganisms, the temperature should be well controlled to reduce the activity of SRB during the production process.
在油气开采过程中，常常会在产出介质中观察到微生物。在生产过程中，金属集输管道内壁发现了由CO和微生物引起的腐蚀。为了探究L245材料在硫酸盐还原菌（SRB）和CO共同作用下的腐蚀特性，本文建立了CO-SRB腐蚀体系。开展了腐蚀速率、表面形貌及腐蚀产物分析的实验研究。研究了在CO饱和且分压为0.06 MPa时温度对SRB腐蚀的影响。观察到CO-SRB腐蚀体系中的腐蚀比单一CO腐蚀体系中的更严重。在40℃时，CO引起的腐蚀速率为0.0597 mm/a，SRB引起的腐蚀速率为0.0766 mm/a。因此，应更加关注含有微生物集输管道的腐蚀状况。此外，在本文实验条件下，当介质温度为40℃时，SRB的活性更强，L245试样上的腐蚀更明显。为了减少微生物对金属管道的腐蚀破坏，在生产过程中应很好地控制温度以降低SRB的活性。
