硫酸盐还原菌（SRB）在乙酸环境中对X65钢腐蚀行为的研究

何婷婷; 冯艺; 闫化云; 王毛毛; 于海涛; 陈迎锋; 陆科洁

doi:10.7643/ issn.1672-9242.2025.09.015

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装备环境工程 ›› 2025, Vol. 22 ›› Issue (9) : 138-146. DOI: 10.7643/ issn.1672-9242.2025.09.015

重大工程装备

硫酸盐还原菌（SRB）在乙酸环境中对X65钢腐蚀行为的研究

何婷婷¹, 冯艺^2,*, 闫化云¹, 王毛毛², 于海涛¹, 陈迎锋², 陆科洁¹

作者信息 +

Corrosion Behavior of X65 Steel by Sulphate Reducing Bacteria (SRB) in Acetic Acid Environment

HE Tingting¹, FENG Yi^2,*, YAN Huayun¹, WANG Maomao², YU Haitao¹, CHEN Yingfeng², LU Kejie¹

Author information +

文章历史 +

摘要

目的研究不同乙酸浓度介质中SRB的生长规律及不同乙酸环境下SRB对X65钢腐蚀行为的影响。方法通过电化学测试、静态浸泡腐蚀试验及表面形貌分析进行研究。结果在含乙酸体系中,SRB浓度显著高于无乙酸体系,其生长过程可分为快速生长期（0~7 d）和衰亡期（7~14 d）。无乙酸体系中,X65钢以均匀腐蚀为主,腐蚀速率为0.204~0.225 mm/a,腐蚀产物为Fe₃O₄。含乙酸体系中,试样表面形成局部腐蚀坑,坑内可见杆状SRB细菌,腐蚀产物为Fe₃O₄和FeS,局部腐蚀速率为0.365~1.564 mm/a,均匀腐蚀速率为0.046~0.068 mm/a。随着浸泡时间的延长,电化学腐蚀速率及局部腐蚀速率均出现下降趋势。结论乙酸的加入显著提高了SRB浓度,大量SRB附着在X65钢表面,其代谢过程、代谢产物及腐蚀产物膜三者共同作用导致腐蚀机制发生显著变化。均匀腐蚀倾向虽有所降低,但局部腐蚀风险显著增大。

Abstract

The work aims to study the growth pattern of SRB in different acetic acid concentration media and the effect of SRB on the corrosion behavior of X65 steel in different acetic acid environments. The study was conducted by electrochemical tests, static immersion corrosion tests and surface morphology analysis. The results showed that the concentration of SRB was significantly higher in the acetic acid-containing system than in the acetic acid-free system, and the growth process could be divided into a rapid growth period (0 d-7 d) and a decline period (7 d-14 d). In the acetic acid-free system, the X65 steel mainly underwent uniform corrosion, with a uniform corrosion rate ranged from 0.204 mm/a to 0.225 mm/a, and the corrosion product was Fe₃O₄. In the acetic acid-containing system, local corrosion pits were formed on the sample surface, with rod-shaped SRB bacteria visible inside the pits. The corrosion products were Fe₃O₄ and FeS, and the local corrosion rate ranged from 0.365 mm/a to1.564 mm/a, while the uniform corrosion rate ranged from 0.046 mm/a to 0.068 mm/a. With the prolongation of immersion time, the electrochemical corrosion rate and local corrosion rate showed a decreasing trend. The addition of acetic acid significantly increases the concentration of SRB, a large number of SRB attach to the surface of X65 steel, its metabolic process, metabolic products and corrosion product film together lead to significant changes in the corrosion mechanism. The uniform corrosion tendency is reduced, but the risk of local corrosion increases significantly.

导出引用

何婷婷, 冯艺, 闫化云, 王毛毛, 于海涛, 陈迎锋, 陆科洁. 硫酸盐还原菌（SRB）在乙酸环境中对X65钢腐蚀行为的研究[J]. 装备环境工程. 2025, 22(9): 138-146 https://doi.org/10.7643/ issn.1672-9242.2025.09.015

HE Tingting, FENG Yi, YAN Huayun, WANG Maomao, YU Haitao, CHEN Yingfeng, LU Kejie. Corrosion Behavior of X65 Steel by Sulphate Reducing Bacteria (SRB) in Acetic Acid Environment[J]. Equipment Environmental Engineering. 2025, 22(9): 138-146 https://doi.org/10.7643/ issn.1672-9242.2025.09.015

中图分类号： TG172

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