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中国腐蚀与防护学报  2021, Vol. 41 Issue (6): 795-803    DOI: 10.11902/1005.4537.2020.230
  研究报告 本期目录 | 过刊浏览 |
成品油输送管道微生物腐蚀案例分析
张斐1, 王海涛2, 何勇君3, 张天遂1, 刘宏芳1()
1.华中科技大学化学与化工学院 材料化学与服役失效湖北省重点实验室 武汉 430074
2.中国特种设备检测研究院 北京 100029
3.中国石化销售有限公司华南分公司 广州 510000
Case Analysis of Microbial Corrosion in Product Oil Pipeline
ZHANG Fei1, WANG Haitao2, HE Yongjun3, ZHANG Tiansui1, LIU Hongfang1()
1.Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2.China Special Equipment Inspection and Research Institute, Beijing 100029, China
3.SINOPEC Sales Co. Ltd. , (South China), Guangzhou 510000, China
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摘要: 

通过分析成品油输送管线腐蚀产物组成、酸溶特性，利用细菌培养法培养和测定了腐蚀产物中与金属材料微生物腐蚀相关的细菌如硫酸盐还原菌 (SRB)、铁细菌 (IOB) 的含量。模拟成品油输送管道厌氧环境和微量水存在情况，利用电化学极化曲线和电化学阻抗法、腐蚀失重法结合表面分析技术研究了X60管线钢在含SRB介质中的腐蚀行为。结果表明，多数管线腐蚀产物中存在SRB和IOB，管道沉积物以Fe3O4、FeS、Fe(OH)3、Fe2O3等形式存在。在含有成品油和SRB菌液的模拟实验中，X60钢表面形成大量疏松多孔的腐蚀产物和SRB细菌的聚集体，腐蚀程度较空白对照组严重，且腐蚀形态呈现点蚀特征，点蚀坑深度高达25.1 μm/14 d。
关键词 ： 成品油输送管线内腐蚀,  硫酸盐还原菌,  铁细菌,  X60碳钢,  微生物腐蚀    
Abstract：

The composition and acid-solubility characteristics of corrosion products in several product oil pipelines were investigated, and the content of bacteria related to microbiologically influenced corrosion of metal materials such as sulfate reducing bacteria (SRB) and iron bacteria (IOB) in corrosion products were cultured and determined by bacterial culture method. The corrosion behavior of X60 pipeline steel in SRB-containing medium was studied by means of electrochemical polarization curve measurement, alternating impedance method, corrosion mass loss method and surface analysis technology. The results show that SRB and IOB exist in most pipeline corrosion products, and the pipeline sediments consist mainly of Fe3O4, FeS, Fe(OH)3, and Fe2O3. The results of corrosion test in a simulated solution containing product oil and SRB bacterial revealed that a large number of loose and porous corrosion products and SRB bacterial aggregation were formed on the surface of X60 steel, while the corrosion degree was more serious than that of the blank control group. Moreover, the corrosion morphology of the steel showed pitting characteristics with pit depth up to 25.1 μm/14 d.
Key words： internal corrosion of product oil pipeline    sulfate-reducing bacteria (SRB)    iron oxidized bacteria (IOB)    X60 carbon steel    microbiologically influenced corrosion (MIC)
收稿日期: 2020-12-02     
ZTFLH:  TG174  
基金资助:中国石油化工股份有限公司项目(319008-8)
通讯作者: 刘宏芳     E-mail: liuhf@hust.edu.cn
Corresponding author: LIU Hongfang     E-mail: liuhf@hust.edu.cn
作者简介: 张斐，男，1995年生，硕士生
王海涛，男，1982年生，博士，高级工程师
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引用本文:

张斐, 王海涛, 何勇君, 张天遂, 刘宏芳. 成品油输送管道微生物腐蚀案例分析[J]. 中国腐蚀与防护学报, 2021, 41(6): 795-803.
Fei ZHANG, Haitao WANG, Yongjun HE, Tiansui ZHANG, Hongfang LIU. Case Analysis of Microbial Corrosion in Product Oil Pipeline. Journal of Chinese Society for Corrosion and protection, 2021, 41(6): 795-803.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.230      或      https://www.jcscp.org/CN/Y2021/V41/I6/795

SampleRate of acid insolubleCompositions analysisSRB content mLIOB content mL
Jianshui89%Fe3O4, FeS, Fe2O31.0×1051.0×103
Huanan78%Fe3O4, FeS1.0×1051.0×104
Maoming73.5%Fe3O4, FeS, Fe2O3, FeOOH1.0×1061.0×103
Kunming diesel63.5%Fe(OH)3, Fe2O3, FeOOHUndetected
Kunming gasoline89%Fe3O4
表1  酸溶实验、XRD成分分析、微生物培养及细菌含量测定表
图1  管道腐蚀沉积物的XRD图
图2  X60钢试样在含SRB菌液中浸泡不同时间的SEM像
图3  X60钢试样在4种不同测试体系中的电化学阻抗谱
图4  电化学阻抗拟合等效电路图
ConditionRs / Ω·cm2Qf / 10-4 F·cm-2Qf-nRf / Ω·cm2Cdl / 10-2 F·cm-2Cdl-nRct / Ω·cm2Rp / Ω·cm2
Medium1 d8.241.52×10-40.942273482.71×10-40.8411535142699
3 d6.8472.15×10-40.946138873.11×10-30.927356217449
5 d7.0152.42×10-40.97884463.45×10-40.873937317819
8 d6.9153.12×10-40.945176798.59×10-40.943629823977
11 d7.743.49×10-40.949356768.23×10-40.9221179847474
14 d7.634.40×10-40.953472056.29×10-40.9781819365398
Oil-Medium1 d9.5391.74×10-40.943224102.82×10-40.8541483737247
3 d8.3622.12×10-40.94760212.15×10-40.871860014621
5 d8.3363.05×10-40.945112897.57×10-40.875401615305
8 d11.113.68×10-40.950336738.92×10-40.9551017743850
11 d10.724.39×10-40.943302373.94×10-40.9531525245489
14 d11.394.65×10-40.952392244.18×10-40.9381896658190
SRB solution1 d17.744.31×10-40.86684.21.19×10-60.21391449228.2
3 d11.159.44×10-30.811653.96.11×10-30.89135674220.9
5 d11.86.74×10-30.85617803.98×10-30.87271598939
8 d13.313.74×10-30.92479231.95×10-30.896374911672
11 d13.392.46×10-30.926108441.09×10-40.9131756528409
14 d13.732.19×10-30.925186025.14×10-40.9152116039762
Oil-SRB solution1 d18.18.01×10-30.95815027.53×10-50.3031180213304
3 d15.791.68×10-30.93443561.58×10-20.77312685624
5 d12.946.57×10-30.92165237.59×10-50.9751350020023
8 d14.515.25×10-30.92478436.07×10-50.9611479922642
11 d13.435.00×10-30.94933513.87×10-40.9761553018881
14 d13.974.58×10-30.98715769.81×10-40.9331754819124
表2  4种测试体系中X60碳钢的电化学阻抗图拟合所得电化学参数
图5  X60碳钢在不同测试体系中电化学阻抗拟合Rp随时间变化图
图6  X60钢在4种不同体系中浸泡14 d后的动电位极化曲线
Conditionβa / V·dec-1βc / V·dec-1Ecorr, SCE / VIcorr / A·cm-2
Medium64.36-41.663-0.7453.02×10-7
Medium contains oil18.69-38.11-0.7595.69×10-7
SRB solution177.12-46.142-0.8137.11×10-7
SRB solution contains oil225.24-43.497-0.9502.41×10-6
表3  X60钢在几种不同体系中浸泡14 d后的动电位极化曲线拟合结果
图7  X60碳钢在4种腐蚀体系中浸泡14 d后的腐蚀产物膜形貌图
图8  X60碳钢在几种腐蚀体系中浸泡14 d后的腐蚀产物EDS分析
图9  X60碳钢浸泡14 d后去除腐蚀产物后的3D形貌
图10  X60钢试样在4种腐蚀体系中浸泡14 d后的失重图
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