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中国腐蚀与防护学报  2026, Vol. 46 Issue (3): 845-854     CSTR: 32134.14.1005.4537.2025.203      DOI: 10.11902/1005.4537.2025.203
  研究报告 本期目录 | 过刊浏览 |
旱莲草提取物的缓蚀抑菌性能研究
贺三1(), 易思婕1, 蔡欣悦2, 罗建宏3, 蒋雨霏1, 杨琛1, 王圣毅1
1.西南石油大学石油与天然气工程学院 成都 610500
2.中海石油气电集团有限责任公司江苏分公司 南京 210019
3.中国石油西南油气田分公司 成都 610051
Corrosion Inhibition and Antibacterial Performance of Eclipta Prostrata Extract
HE San1(), YI Sijie1, CAI Xinyue2, LUO Jianhong3, JIANG Yufei1, YANG Chen1, WANG Shengyi1
1.College of Oil and Gas Engineering, Southwest Petroleum University, Chengdu 610500, China
2.China Sea Petroleum Power Group Co. Ltd., Jiangsu Branch, Nanjing 210019, China
3.Petrochina Southwest oil and Gasfield Company, Chengdu 610051, China
引用本文:

贺三, 易思婕, 蔡欣悦, 罗建宏, 蒋雨霏, 杨琛, 王圣毅. 旱莲草提取物的缓蚀抑菌性能研究[J]. 中国腐蚀与防护学报, 2026, 46(3): 845-854.
San HE, Sijie YI, Xinyue CAI, Jianhong LUO, Yufei JIANG, Chen YANG, Shengyi WANG. Corrosion Inhibition and Antibacterial Performance of Eclipta Prostrata Extract[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(3): 845-854.

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摘要: 

页岩气生产过程中CO2腐蚀和硫酸盐还原菌(SRB)腐蚀问题显著,传统有机缓蚀剂和杀菌剂对环境不友好。为开发绿色缓蚀抑菌剂,以旱莲草为原料,采用超声辅助乙醇萃取制备提取物,通过电化学测试法、失重实验、绝迹稀释法以及表面分析技术对其在20#钢表面的缓蚀性能和抑菌性能进行研究,通过FTIR和XPS对其官能团进行表征。结果表明,在35 ℃、提取物体积比为5%时,缓蚀率达到94.31%;随着体积比增加,对SRB的抑菌效果越好。提取物在钢片表面符合Langmuir吸附模型。提取物中的槲皮素、旱莲苷A等成分吸附在金属表面,形成致密保护膜。量子化学计算结果表明槲皮素的吸附性能比旱莲苷A和豆甾醇优异。此外,提取物中的黄酮类化合物与蛋白质结合使之变性实现抑菌。旱莲草提取物具有作为缓蚀抑菌双效药剂的应用潜力。

关键词 旱莲草CO2腐蚀SRB腐蚀20#钢    
Abstract

The rapid growth of shale gas production has led to frequent CO2 corrosion and SRB corrosion during operations. Traditional organic corrosion inhibitors and bactericides are not environmentally friendly. To develop a green dual-functional agent, Eclipta extract was prepared using ultrasonic-assisted ethanol extraction. The corrosion inhibition performance and antibacterial performance of the acquired Eclipta extract were studied by electrochemical test, weight loss measurement, extinction dilution method and surface analysis technology, while its functional groups was characterized by FTIR and XPS. Results showed that the corrosion inhibition efficiency of 20# steel in a real produced water from a gas field in the Southwest China at 35℃ reached 94.31% for a dosage of 5% Eclipta extract (in volume ratio). The antibacterial effect on SRB was enhenced with the increasing Eclipta extract volume ratio. The adsorption on 20# steel surface of Eclipta extract followed the Langmuir adsorption model. Effective components (e.g., quercetin and ecliptasaponin A) adsorbed onto the metal surface to form a dense protective film. Quantum chemical calculations showed that the adsorption properties of quercetin were superior to those of eclipcoside A and stigmasterol. Additionally, flavonoids in the extract could inhibit bacteria by binding and denaturing proteins. Eclipta extract shows good prospect as a green dual-functional agent for corrosion inhibition and bacterial suppression.

Key wordsEclipta prostrata    CO2 corrosion    SRB corrosion    20# steel
收稿日期: 2025-06-26      32134.14.1005.4537.2025.203
ZTFLH:  TG174  
基金资助:四川省科技厅基金项目(2020YJ0393);油气藏地质及开发工程国家重点实验室开放基金(PLN0448)
通讯作者: 贺三,E-mail:hesan@126.com,研究方向为管道腐蚀与防护
Corresponding author: HE San, E-mail: hesan@126.com
作者简介: 贺 三,男,1975年生,博士,教授
图1  不同温度、不同浓度旱莲草提取物在腐蚀溶液中的Nyquist图
图2  腐蚀溶液中不含和含旱莲草提取物的等效电路
T/ ℃Volumefraction / %Rs/ Ω·cm2Cdl/ μF·cm-2Rct/ Ω·cm2RL/ Ω·cm2Cf/ μF·cm-2Rf/ Ω·cm2W/ Ω·cm2·s1/2χ2η2/ %
2501.48224.5991.67169.15159.62--6.39 × 10-3-
11.11175.11180.75-128.16288.40.02997.32 × 10-349.28
21.85153.49229.13-92.61341.10.01345.66 × 10-359.99
30.72120.07371.8-85.73391.90.01075.39 × 10-375.34
41.36111.37405.21-65.41440.60.00994.58 × 10-377.38
51.4590.56589.65-54.24474.30.00978.74 × 10-384.45
3501.07255.1256.09127.63188.96--4.94 × 10-3-
11.57188.36339.56-135.87273.480.00874.14 × 10-383.48
21.77156.23473.88-99.91334.560.00711.47 × 10-388.16
31.61141.99581.42-75.72498.710.00649.33 × 10-390.35
41.39120.47622.26-63.55510.050.00627.85 × 10-390.99
51.54100.23673.13-45.03569.270.00592.02 × 10-391.67
4501.6271.5343.75100.99219.1--7.69 × 10-3-
10.72209.45255.1-159.98299.960.01026.28 × 10-382.85
21.49168.12305.77-144.26302.180.00972.91 × 10-385.69
31.25150.86356.16-108.01373.260.00926.74 × 10-387.72
42.18126.85379.25-91.37456.120.00885.19 × 10-388.46
51.88120.86422.75-73.93510.460.00744.86 × 10-389.65
表1  不同温度、不同浓度旱莲草提取物在腐蚀溶液中的电化学阻抗谱拟合结果
图3  不同温度、不同浓度旱莲草提取物在腐蚀溶液中的极化曲线
T/ ℃Volume fraction / %Ecorr/ mVIcorr/ μA·cm-2βa/ mV·dec-1βc/ mV·dec-1ƒaƒcƒa/ ƒcη1/ %
250-671.04118.6437.8897.78----
1-663.6224.6765.94108.430.17680.21190.834579.21
2-649.0721.88161.41115.170.15150.21000.721281.56
3-653.919.93228.73121.930.16230.20130.806183.2
4-658.0316.76237.17126.720.12750.14920.854385.87
5-661.4815.29240.58132.850.12140.13570.894387.11
350-685.15191.4848.17102.66----
1-619.7131.26171.98113.180.10780.28130.383483.67
2-607.625.13184.58128.770.08600.23910.359786.88
3-647.1422.91192.57138.460.09700.15550.623888.04
4-630.9916.57208.46122.440.06220.12540.495591.35
5-613.3610.89227.633137.940.03940.09100.433594.31
450-684.97229.4642.7881.932----
1-663.1141.8472.56102.70.13440.22470.598081.77
2-616.733.57137.97113.360.09230.27640.333985.37
3-644.4128.63168.35130.820.10010.17360.576487.52
4-622.1626.95183.44176.960.08440.16960.497988.26
5-625.6921.61209.81161.580.07080.13550.522390.58
表2  不同温度、不同浓度旱莲草提取物在腐蚀溶液中的极化曲线参数
图4  静态失重实验均匀腐蚀速率及平均缓蚀率
图5  腐蚀溶液中不含和含旱莲草提取物的腐蚀形貌
图6  35 ℃下旱莲草提取物在20#钢表面的吸附等温线
图7  不同温度下的Langmuir吸附模型
图8  旱莲草提取物红外光谱图
图9  旱莲草提取物XPS谱图
MoleculeOptimized molecular geometryHOMOLUMO
Quercetin
Ecliptasaponin A
Stigmasterol
表3  3种化合物FMO电荷密度分布
MoleculeEHOMO / eVELUMO / eVΔE / eVχ / eVη3 / eVσ / eV -1ΔN
Quercetin-4.89-2.232.673.571.330.751.29
Ecliptasaponin A-5.34-0.974.383.162.190.460.88
Stigmasterol-5.060.145.202.462.600.380.87
表4  3种化合物的量子化学参数
Volume fraction / %Test vial resultsViable cell count/ CFU·L-1

3

+++++-+-

+++++---

+++++---

40000

5

+++++---

+++++---

+++++---

25000

7

++++++--

++++-+--

++++-+--

16000

9

++++----

+++++---

+++++---

9500

11

+++-+---

+++++---

+++-----

1150

表5  旱莲草提取物抑菌评价效果
图10  不含和含旱莲草提取物的SRB腐蚀形貌
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