亚铁离子对硫酸盐还原菌腐蚀行为的影响

doi:10.11896/cldb.25020003

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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.

Key words： sulfate-reducing bacteria ferrous ions X80 steel corrosion

Published: 10 March 2026 Online: 2026-03-10

CLC number:

TG172

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	Articles by authors
	ZHANG Yani
	DUAN Bowen
	SONG Wei
	ZHANG Chengxin
	FAN Bing
	WANG Simin

Cite this article:

ZHANG Yani,DUAN Bowen,SONG Wei, et al. Effect of Ferrous Ion on the Corrosion Behavior of Sulfate-reducing Bacteria[J]. Materials Reports, 2026, 40(5): 25020003-9.

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https://www.mater-rep.com/EN/10.11896/cldb.25020003 OR https://www.mater-rep.com/EN/Y2026/V40/I5/25020003

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