普通脱硫弧菌对2205双相不锈钢腐蚀的影响

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-07-20 DOI:10.1016/j.electacta.2025.146967

Maryann C. Ebeagwu , Boxin Wei , Zheng Cai , Inime I. Udoh , Jin Xu , Cheng Sun

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引用次数: 0

摘要

温度对2205双相不锈钢（DSS）在海洋环境中硫酸盐还原菌（SRB）引起的腐蚀有重要影响。本研究检测了2205 DSS在模拟海水中超过14天的SRB活性和腐蚀行为。电化学测试和表面分析表明，在40°C时SRB活性和生物膜形成最大，大大增加了腐蚀速率。硫化物（FeS₂，FeS）降解了钝化膜，增加了缺陷密度和点蚀敏感性。在60°C时，热应力抑制SRB活力，尽管残余硫化物和氯化物驱动的非生物腐蚀比无菌对照持续更高的腐蚀速率。这些发现表明，在25-40°C时，SRB具有温度依赖性的协同腐蚀机制，在60°C时，SRB转向热加速的非生物降解。

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Insights into temperature-dependent microbiologically influenced corrosion of 2205 duplex stainless steel induced by Desulfovibrio vulgaris

Temperature critically influences sulfate-reducing bacteria (SRB)-induced corrosion of 2205 duplex stainless steel (DSS) in marine environments. This study examines SRB activity and corrosion behaviour of 2205 DSS over 14 days in simulated seawater. Electrochemical testing and surface analyses revealed maximum SRB activity and biofilm formation at 40 °C, substantially increasing corrosion rates. Sulfide species (FeS₂, FeS) degraded the passive film, increasing defect density and pitting susceptibility. At 60 °C, thermal stress inhibited SRB viability, though residual sulfides and chloride-driven abiotic corrosion sustained higher corrosion rates than sterile controls. These findings demonstrate a temperature-dependent synergistic SRB corrosion mechanism at 25–40 °C and a shift to thermally accelerated abiotic degradation at 60 °C.

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.