硫酸盐还原菌作用下管道钢耐蚀性的对比分析：L360、L245NS和抗菌钢的见解

IF 1.3 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science Pub Date : 2025-02-06 DOI:10.1016/j.ijoes.2025.100960

Shimeng He , Kongyang Wang , Yongyang Zhao , Yao Lu , Ruijing Jiang , Jikui Li , Yong Xiang

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引用次数: 0

摘要

针对油气管道中存在的微生物影响腐蚀（MIC）问题，采用失重法、表面分析技术和电化学测试等方法，对管道钢L360、L245NS和抗菌钢在含硫酸盐还原菌（SRB）环境中的腐蚀性能和机理进行了对比研究。结果表明：均匀腐蚀速率和点蚀速率依次为：L360 >； L245NS >； 抗菌钢；电化学试验进一步证实，抗菌钢具有优异的耐腐蚀性能，其自腐蚀电位最高，腐蚀电流密度为L360钢的五分之一。此外，抗菌钢在SRB环境中更容易钝化。暴露7天后，其电荷转移电阻和生物膜电阻之和约为L245NS钢的2.9倍，L360钢的3倍。在抗菌钢中添加Cu可能有助于抑制微生物生长和防止生物膜的形成，尽管这一机制存在争议。

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Comparative analysis of corrosion resistance of pipeline steels exposed to sulfate-reducing bacteria: Insights on L360, L245NS and antibacterial steels

In response to the microbiologically influenced corrosion (MIC) issues encountered in oil and gas pipelines, a comparative study was conducted on the corrosion properties and mechanisms of pipeline steels L360, L245NS, and antibacterial steel in environments containing sulfate-reducing bacteria (SRB) using the weight-loss method, surface analysis techniques, and electrochemical tests. The results showed that both the uniform corrosion rate and pitting rate followed the order: L360 > L245NS > antibacterial steel. Electrochemical tests further confirmed that the antibacterial steel demonstrated superior corrosion resistance, with the highest self-corrosion potential and a corrosion current density one-fifth that of L360 steel. Additionally, the antibacterial steel is more prone to passivation in the SRB environment. After 7 days of exposure, the sum of its charge transfer resistance and biofilm resistance was approximately 2.9 times that of L245NS steel and 3 times that of L360 steel. The addition of Cu to the antibacterial steel may contribute to inhibiting microbial growth and preventing biofilm formation, though this mechanism is controversial.

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来源期刊

International Journal of Electrochemical Science 工程技术-电化学

CiteScore

3.00

自引率

20.00%

发文量

714

审稿时长

2.6 months

期刊介绍： International Journal of Electrochemical Science is a peer-reviewed, open access journal that publishes original research articles, short communications as well as review articles in all areas of electrochemistry: Scope - Theoretical and Computational Electrochemistry - Processes on Electrodes - Electroanalytical Chemistry and Sensor Science - Corrosion - Electrochemical Energy Conversion and Storage - Electrochemical Engineering - Coatings - Electrochemical Synthesis - Bioelectrochemistry - Molecular Electrochemistry