杨吉可,李众,王军磊,娄云天,李晓刚.杀菌剂THPS对X80管线钢应力腐蚀开裂影响及机理研究[J].表面技术,2024,53(20):69-81.
YANG Jike,LI Zhong,WANG Junlei,LOU Yuntian,LI Xiaogang.Mitigation of Stress Corrosion Cracking of X80 Steel Induced by Sulfate Reducing Desulfovibrio Vulgaris Biofilm Using THPS[J].Surface Technology,2024,53(20):69-81 |
| 杀菌剂THPS对X80管线钢应力腐蚀开裂影响及机理研究 |
| Mitigation of Stress Corrosion Cracking of X80 Steel Induced by Sulfate Reducing Desulfovibrio Vulgaris Biofilm Using THPS |
| 投稿时间：2023-11-22 修订日期：2023-12-04 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.20.006 |
| 中文关键词: 微生物腐蚀 硫酸盐还原菌 应力腐蚀开裂 杀菌剂 |
| 英文关键词:microbiologically influenced corrosion sulfate-reducing bacteria stress corrosion cracking THPS |
| 基金项目: |
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| Author | Institution |
| YANG Jike | Corrosion & Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;National Materials Corrosion and Protection Data Center, Beijing 100083, China |
| LI Zhong | Corrosion & Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;National Materials Corrosion and Protection Data Center, Beijing 100083, China |
| WANG Junlei | Defense Engineering Institute, AMS, PLA, Henan Luoyang 471000, China |
| LOU Yuntian | Corrosion & Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;National Materials Corrosion and Protection Data Center, Beijing 100083, China |
| LI Xiaogang | Corrosion & Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;National Materials Corrosion and Protection Data Center, Beijing 100083, China |
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| 中文摘要: |
| 目的 研究杀菌剂THPS对X80管线钢应力腐蚀开裂的影响及机理。方法 37 ℃下，将X80钢U弯和10 mm×10 mm平片浸泡在接种了硫酸弧菌(Desulfovibrio vulgaris)的150 mL ATCC 1249培养基(添加杀菌剂THPS质量浓度为0、15、30、45、60 mg/L)中培养14 d。通过细胞计数实验、失重测试、H2S和H2测量、扫描电子显微镜(SEM)测试、激光共聚焦荧光显微镜(CLSM)测试、开路电位(OCP)、电化学阻抗(EIS)、线性极化电阻(LPR)、动电位极化测试、热力学计算和光电子能谱仪XPS，分别对X80钢在不同浓度杀菌剂含量的D. vulgaris中的腐蚀活动、应力腐蚀开裂裂纹生长情况、杀菌剂对生物膜的影响以及腐蚀产物进行分析。结果 失重、固着细胞计数和浮游细胞计数3项数据均呈现随着THPS浓度升高而下降的趋势。同时，SEM也可以观察到X80钢U弯在不同浓度下的THPS中形成的裂纹长度随着THPS的浓度增大呈减小趋势。OCP、EIS、LPR和动电位极化结果证实了杀菌剂THPS浓度增加导致微生物腐蚀活动下降，而较慢的微生物腐蚀活动减缓了X80钢的应力腐蚀开裂。通过理论计算确定了THPS对X80钢U弯的吸附类型。结论 杀菌剂THPS对SRB具有有效杀灭和驱散作用，从而减缓了X80钢的应力腐蚀开裂，THPS对X80钢U弯的吸附类型为静电导致的物理吸附和电荷交换导致的化学吸附二者兼有。 |
| 英文摘要: |
| Microbiologically influenced corrosion (MIC) is a relatively recent research area in the corrosion field. The most common corrosive microorganism in MIC is sulfate-reducing bacteria (SRB), Desulfovibrio vulgaris. Meanwhile, stress corrosion cracking (SCC) which is induced by both applied stress on the metal and corrosive circumstance, always causes ruptures in industrial fields such as pipelines or storage tanks, leading to severe economic losses. The metabolic activities of D. vulgaris provide corrosion on metal surfaces. Disaster accidents in the industry often occur when pipelines are subjected to both SCC and MIC. X80 pipeline steel is a widely used material for oil and gas pipelines which is susceptible to both MIC and SCC. Hence, it is important to investigate how to mitigate the SCC behavior of X80 steel induced by MIC under continuous mechanical stress, using the X80 U-bend coupon which provides continuous stress on the X80 steel. To solve this problem, biocide, such as Tetrakis hydroxymethyl phosphonium sulfate (THPS) was used to inhibit microbial growth. Meanwhile, different concentration of injected THPS has different intensity on the mitigation process of D. vulgaris activity. X80 U-bend coupons were immersed in ATCC 1249 culture medium (250 mL in 450 mL anaerobic bottles) inoculated with D. vulgaris. Following a 14-day incubation period of D. vulgaris in ATCC 1249 culture medium at 37 ℃ with X80 U-bend coupons, the weight loss results were 2.7 mg/cm2 (0 mg/L), 1.4 mg/cm2 (15 mg/L), 1.1 mg/cm2 (30 mg/L), 0.7 mg/cm2 (45 mg/L) and 0.5 mg/cm2 (60 mg/L), respectively. The weight loss results indicate that the MIC rate declined with rising THPS concentration. When the THPS concentration is 60 mg/L, the MIC rate has been reduced to a relatively lower level. The sessile cell counts were 9.3×107 cells/cm2 (0 mg/L)，3.9×106 cells/cm2 (15 mg/L), 1.6×106 cells/cm2 (30 mg/L), 3.0×105 cells/cm2 (45 mg/L), 1.0×105 cells/cm2 (60 mg/L), respectively. The planktonic cell counts were 2.1×106 cells/mL (0 mg/L), 2.8×105 cells/mL (15 mg/L), 1.2×105 cells/mL (30 mg/L), 5.0×104 cells/mL (45 mg/L), 2.0×104 cells/mL (60 mg/L), respectively. Both types of cell counts describe that D. vulgaris was mitigated by the increasing THPS concentration. The weight loss results and cell count results describe that the MIC mechanism of X80 U-bend incubated with D. vulgaris follows the extracellular electron transfer (EET)-MIC mechanism. The SEM images of cracking on the X80 U-bend illustrated that the cracking on the X80 U-bend induced by D. vulgaris corresponds to slower crack propagation with higher THPS concentration. Open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), and potentiodynamic polarization results corroborated the increasing THPS concentration corresponding to decreasing MIC rate, which mitigate the SCC activity of X80 steel. Depending on the potentiodynamic polarization results, a theoretical calculation was formed to determine the adsorption mechanism between THPS and X80 U-bend. The standard Gibbs free energy of the adsorption process is −33.0 kJ/mol, which determines that the adsorption mechanism of THPS and X80 U-bend are both physical absorption and chemical absorption. Physical absorption is caused by the electrostatic effect between THPS and X80 U-bend and chemical absorption is caused by charge exchange between THPS and X80 U-bend. |
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