Abstract Sulfate-reducing bacteria (SRB)-induced corrosion of 2205 duplex stainless steel (DSS) was investigated via novel high-resolution characterization. After 28 days of immersion, the corrosion rate of coupons in the SRB-inoculated medium was 10 times higher than that of coupons in the sterile medium. Corrosion products were absent from the top-part of the biofilm where acidic -COOH was present, which indicated corrosion was not caused by metabolites. SRB clung to the matrix and mutually dissolved, which may favor electron transmission. Extracellular electron transfer (EET), breakage of the passive film and inhibition of passive film repair contributed to SRB-induced corrosion in this study.

中文翻译：

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基于高分辨率表征的2205双相不锈钢微生物腐蚀研究

摘要 通过新型高分辨率表征研究了硫酸盐还原菌 (SRB) 对 2205 双相不锈钢 (DSS) 的腐蚀。浸泡 28 天后，试样在 SRB 接种介质中的腐蚀速率比无菌介质中试样的腐蚀速率高 10 倍。存在酸性-COOH 的生物膜顶部没有腐蚀产物，这表明腐蚀不是由代谢物引起的。SRB 附着在基质上并相互溶解，这可能有利于电子传输。在这项研究中，细胞外电子转移 (EET)、钝化膜的破裂和钝化膜修复的抑制有助于 SRB 诱导的腐蚀。