Localized corrosion of submerged steel H-piles was detected in a Florida bridge spanning over a brackish river. Analysis of the water showed proliferation of sulfate reducing bacteria (SRB). The steel piles had coincident heavy marine growth that may support biofilms and biocorrosion. The objective of the research described here was to identify the role of the physical morphologies of macrofouling on SRB activity and the aggravation of microbiologically influences corrosion (MIC) of submerged steel bridge. Laboratory experiments were carried out in nutrient-rich environments inoculated with SRB, with both porous and laminate crevice conditions characteristic of soft and hard marine fouling. It was confirmed that SRB proliferation can occur within the crevice environments, but aeration levels under crevices with interaction with the bulk solution can affect SRB activity. Electrochemical impedance spectroscopy provided separation of environmental parameters and surface reaction parameters for the complicated systems relating to corrosion under the porous and laminate crevice geometries.

在佛罗里达州一座横跨咸水河的桥梁中检测到淹没钢 H 型桩的局部腐蚀。对水的分析表明硫酸盐还原菌（SRB）的增殖。钢桩同时有大量的海洋生长，可能支持生物膜和生物腐蚀。这里描述的研究的目的是确定宏观污垢的物理形态对 SRB 活性的作用以及水下钢桥微生物影响腐蚀 (MIC) 的恶化。实验室实验是在用 SRB 接种的营养丰富的环境中进行的，具有软硬海洋污垢的多孔和层压缝隙条件特征。已证实 SRB 增殖可发生在缝隙环境中，但是裂缝下的曝气水平与散装溶液的相互作用会影响 SRB 的活性。电化学阻抗谱为与多孔和层压缝隙几何形状下的腐蚀相关的复杂系统提供了环境参数和表面反应参数的分离。