Effect of Ferrous Ion on the Corrosion Behavior of Sulfate-reducing Bacteria
ZHANG Yani1,*, DUAN Bowen1, SONG Wei1, ZHANG Chengxin1, FAN Bing2, WANG Simin3
1 School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China; 2 China National Petroleum Engineering Materials Research Institute Co., Ltd., Xi'an 710077, China; 3 Shougang Group Changzhi Iron and Steel Co., Ltd., Changzhi 046031, Shanxi, China
Abstract: Ferrous ions (Fe2+) play an important role in the growth of SRB and MIC of carbon steel. In this work, the effects of Fe2+ on the corrosion behavior of X80 pipeline steel in the environment of sulfate-reducing bacteria were studied by biological culture technology, immersion experiment, electrochemistry and other experimental methods, combined with Na2S2O3 titration technology, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), laser confocal and other analytical methods. The results showed that the Fe2+ of 5 g/L concentration promoted the growth of SRB and prolonged the life cycle of SRB, with a peak SRB quantity of 5.15×107 cm-3. High concentrations Fe2+ (≥10 g/L) inhibited the growth of SRB and shortened the life cycle of SRB. In the low concentration of Fe2+ environment, the corrosion rate is determined by activation of the substrate surface and high activity of SRB in the initial stage, and determined by the dense SRB film layer in the middle and late stages, so the corrosion rate of X80 steel increases and then decreases with the extension of exposure time. In the high concentration of Fe2+ environment, the corrosion rate is determined by activation of the substrate surface and lower activity of SRB in the initial stage, and is determined by the multi-cleavage miscible film layer in the middle and later stages, and the corrosion rate increases with the exposure time. After 20 days exposure, the pitting corrosion rate and the average rate of weight loss of the X80 steel increase synchronously, and the maximum average rate of weight loss is 0.102 4 mm/a when the concentration of Fe2+ is 40 g/L.
张雅妮, 段博文, 宋伟, 张成鑫, 樊冰, 王思敏. 亚铁离子对硫酸盐还原菌腐蚀行为的影响[J]. 材料导报, 2026, 40(5): 25020003-9.
ZHANG Yani, DUAN Bowen, SONG Wei, ZHANG Chengxin, FAN Bing, WANG Simin. Effect of Ferrous Ion on the Corrosion Behavior of Sulfate-reducing Bacteria. Materials Reports, 2026, 40(5): 25020003-9.
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2026, Vol. 40 
