Microbial Corrosion Behavior of L245 Pipeline Steel in the Presence of Iron-Oxidizing Bacteria and Shewanella algae
Fanghui Zhu, Yiyang Liu, Chunsheng Wu, Kai Li, Yingshuai Hu, Wei Liu, Shuzhen Yu, Mingxing Li, Xiaohuan Dong, Haobo Yu
TL;DR
This study shows how two types of bacteria working together can worsen corrosion in oil pipelines, offering insights into preventing such damage.
Contribution
The novel contribution is identifying synergistic electron transfer between iron-oxidizing bacteria and Shewanella algae that accelerates localized corrosion.
Findings
Localized corrosion of L245 steel is significantly worse in a symbiotic bacterial environment.
Symbiotic bacteria enhance corrosion through electron transfer interactions.
Uniform corrosion rates in symbiosis fall between monoculture systems.
Abstract
Microbiologically influenced corrosion (MIC) poses significant challenges in oilfield water injection environments, leading to substantial socioeconomic losses. L245 steel, a low-alloy steel widely used in oil and gas pipelines due to its excellent mechanical properties and cost-effectiveness, remains highly vulnerable to MIC during long-term service. This study uses surface characterization and electrochemical techniques to investigate the corrosion behavior of L245 pipeline steel under short-cycle conditions in a symbiotic environment of iron-oxidizing bacteria (IOB) and Shewanella algae (S. algae). Key findings revealed that localized corrosion of L245 steel was markedly exacerbated under coexisting IOB and S. algae conditions compared to monoculture systems. However, the uniform corrosion rate under symbiosis fell between the rates observed in the individual IOB and S. algae…
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Taxonomy
TopicsCorrosion Behavior and Inhibition · Concrete Corrosion and Durability · Metal Extraction and Bioleaching