新型耐微生物腐蚀油管钢的硫酸盐还原菌腐蚀行为研究

doi:10.11902/1005.4537.2025.059

中国腐蚀与防护学报

2025, Vol. 45

Issue (6): 1755-1763 CSTR: 32134.14.1005.4537.2025.059 DOI: 10.11902/1005.4537.2025.059

研究报告

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新型耐微生物腐蚀油管钢的硫酸盐还原菌腐蚀行为研究

杨宝齐¹, 闫茂成²(

), 史显波², 高博文²

1 衡阳华菱钢管有限公司衡阳 421099
2 中国科学院金属研究所国家金属腐蚀控制工程技术研究中心沈阳 110016

SRB Induced Corrosion Behavior of a Novel Microbial Corrosion Resistant Pipeline Steel

YANG Baoqi¹, YAN Maocheng²(

), SHI Xianbo², GAO Bowen²

1 Hengyang Hualing Steel Pipe Corporation Limited, Hengyang 421099, China
2 National Engineering Research Center for Corrosion Control, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

杨宝齐, 闫茂成, 史显波, 高博文. 新型耐微生物腐蚀油管钢的硫酸盐还原菌腐蚀行为研究[J]. 中国腐蚀与防护学报, 2025, 45(6): 1755-1763.
Baoqi YANG, Maocheng YAN, Xianbo SHI, Bowen GAO. SRB Induced Corrosion Behavior of a Novel Microbial Corrosion Resistant Pipeline Steel[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1755-1763.

全文: PDF(10793 KB) HTML

摘要:

通过形貌观察、成分分析、微生物分析及电化学测试等方法，研究耐微生物腐蚀(MIC)油管钢的硫酸盐还原菌(SRB)腐蚀行为。结果表明：SRB环境中耐MIC钢表面附着的活跃细菌数量大幅减少，生物膜厚度减小，耐MIC钢有效抑制了表面生物膜的附着生长；耐MIC钢具有更高的自腐蚀电位、更低的腐蚀电流密度和更大的电荷转移电阻；耐MIC钢表面腐蚀产物少，主要为致密的α-FeOOH，而普通钢表面则以疏松的Fe₃O₄为主，普通钢的失重腐蚀速率约为耐MIC钢的1.83倍，通过优化Cu-Cr-Ni三元合金体系，所制备的油管钢抗菌与耐蚀性能均提升。

关键词 ：耐MIC钢, 管道钢, 微生物腐蚀, 硫酸盐还原菌, 微生物膜

Abstract：

The corrosion behavior of a microbial corrosion-resistant (MIC-resistant) pipeline steel induced by sulfate reducing bacteria (SRB) was investigated through morphology observation, composition analysis, microbial culture analysis and electrochemical testing. The results show that, in the SRB environment, the number of active bacteria adhered to the surface of MIC-resistant steel is significantly reduced, and accordingly the thickness of the biofilm decreases. The MIC-resistant steel effectively inhibits biofilm attachment and growth on its surface. The MIC-resistant steel exhibited higher open-circuit potential, lower corrosion current density, and higher charge transfer resistance. There are fewer corrosion products on the surface of the MIC-resistant steel, composed mainly of dense α-FeOOH scale, in the contrast, a loose Fe₃O₄ scale may emerge on the ordinary steel surface. The corrosion rate in mass loss of an ordinary steel is approximately 1.83 times that of the MIC-resistant steel. It follows that comprehensively optimizing the content of the three alloying elements Cu, Cr, and Ni, synergistic improvement in both anti-bacterial and anti-corrosion could be achieved for this novel steel.

Key words： MIC resistant steel pipeline steel microbial corrosion sulfate reducing bacteria biofilm

收稿日期: 2025-02-21 32134.14.1005.4537.2025.059

ZTFLH:

TG172

基金资助:国家自然科学基金(51471176)

通讯作者: 闫茂成，E-mail：yanmc@imr.ac.cn，研究方向为油气材料腐蚀及控制

Corresponding author: YAN Maocheng, E-mail: yanmc@imr.ac.cn

作者简介: 杨宝齐，男，1984年生，本科

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表1 实验用钢的化学成分

图1 耐MIC钢和普通油管钢的显微组织

图2 接菌培养基中浸泡14 d后耐MIC钢和普通钢表面腐蚀产物SEM形貌及EDS分析

图3 耐MIC钢和普通钢在接菌培养基中浸泡14 d后表面Raman图谱

图4 耐MIC钢和普通钢在接菌培养基中浸泡7 d后的CLSM像

图5 耐MIC钢和普通钢在接菌培养基中浸泡14 d，去除腐蚀产物后的表面形貌

图6 耐MIC钢和普通钢在接菌培养基中浸泡14 d后表面最大点蚀形貌

图7 耐MIC钢和普通钢在接菌培养基中浸泡14 d后的动电位极化曲线

表2 耐MIC钢和普通钢在接菌培养基中浸泡14 d后的动电位极化曲线拟合参数

图8 耐MIC钢和普通钢在接菌培养基中浸泡不同时间后的Nyquist和Bode图

图9 用于EIS拟合的等效电路模型

表3 接菌培养基中的EIS拟合结果

图10 耐MIC钢和普通钢在接菌培养基中Rct + Rbc随时间的变化曲线

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