Microbial under-deposit corrosion of pipeline steel in alkali/surfactant/polymer solution

IF 4.5 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Bioelectrochemistry Pub Date : 2025-08-27 DOI:10.1016/j.bioelechem.2025.109097

Victor Malachy Udowo , Maocheng Yan , Fuchun Liu , Peter C. Okafor , Alexander I. Ikeuba

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引用次数: 0

Abstract

Alkali surfactant polymer (ASP) flooding technique is deployed in the oil industry to enhance oil recovery (EOR), especially in aged reservoirs. Microorganisms have been found to utilize the polymer constituent as a nutrient source to accelerate steel corrosion. This work aimed at examining the contributions of microorganisms, sediments, and polymer degradation to the overall corrosion behavior of steel pipes used in ASP flooding system via electrochemical, microscopic, and spectroscopic characterization techniques. The results demonstrate that rust deposition significantly influenced the steel's electrochemical behavior in the SRB-containing ASP solution; driving internal polarization and potential difference with the bare metal thereby establishing a galvanic interaction to accelerate steel corrosion. After 14 days of testing in the SRB environment, the steel covered by rust deposits recorded the most severe localized corrosion of all samples under examination, whereas pitting severity significantly reduced on the bare steel and the sand-deposited coupon. Factors such as sediment conductivity, film development, and microbial activities played crucial role in exacerbating steel corrosion under the rust deposits in the SRB-inoculated ASP solution.

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管道钢在碱/表面活性剂/聚合物溶液中沉积下的微生物腐蚀

碱表面活性剂聚合物（ASP）驱油技术被应用于石油工业，以提高采收率（EOR），特别是在老旧油藏中。已经发现微生物利用聚合物成分作为营养源来加速钢的腐蚀。本研究旨在通过电化学、微观和光谱表征技术，研究微生物、沉积物和聚合物降解对三元复合驱系统中钢管整体腐蚀行为的影响。结果表明：在含srb的ASP溶液中，锈沉积对钢的电化学行为有显著影响；驱动内部极化和与裸金属的电位差，从而建立一个电相互作用，加速钢的腐蚀。在SRB环境中进行了14天的测试后，被锈层覆盖的钢在所有测试样品中记录了最严重的局部腐蚀，而裸钢和砂层的点蚀严重程度显著降低。在srb接种的ASP溶液中，沉积物电导率、膜发育和微生物活动等因素在锈层下加剧钢的腐蚀中发挥了关键作用。

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来源期刊

Bioelectrochemistry 生物-电化学

CiteScore

9.10

自引率

6.00%

发文量

238

审稿时长

38 days

期刊介绍： An International Journal Devoted to Electrochemical Aspects of Biology and Biological Aspects of Electrochemistry Bioelectrochemistry is an international journal devoted to electrochemical principles in biology and biological aspects of electrochemistry. It publishes experimental and theoretical papers dealing with the electrochemical aspects of: • Electrified interfaces (electric double layers, adsorption, electron transfer, protein electrochemistry, basic principles of biosensors, biosensor interfaces and bio-nanosensor design and construction. • Electric and magnetic field effects (field-dependent processes, field interactions with molecules, intramolecular field effects, sensory systems for electric and magnetic fields, molecular and cellular mechanisms) • Bioenergetics and signal transduction (energy conversion, photosynthetic and visual membranes) • Biomembranes and model membranes (thermodynamics and mechanics, membrane transport, electroporation, fusion and insertion) • Electrochemical applications in medicine and biotechnology (drug delivery and gene transfer to cells and tissues, iontophoresis, skin electroporation, injury and repair). • Organization and use of arrays in-vitro and in-vivo, including as part of feedback control. • Electrochemical interrogation of biofilms as generated by microorganisms and tissue reaction associated with medical implants.