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Influence of a dual-species biofilm on the corrosion of mild steel

机译:两种生物膜对低碳钢腐蚀的影响

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摘要

The effect of a dual-species biofilm on the corrosion of carbon steel was examined using two bacterial species: the iron-reducer, Shewanella oneidensis (MR-1), and the sulfate-reducer, Des-ulfovibrio desulfuricans (G20). These experiments exploit the fact that the products of their metabolism (ferrous iron or sulfide) affect the corrosion rate of carbon steel in opposite ways. Electrochemical impedance spectroscopy (EIS) shows that over a short time period, co-cultures of MR-1 and G20 protect steel from corrosion. The fact that an iron-reducing bacterium can inhibit corrosion when a corrosion-enhancing bacterium is present warrants future study with respect to its potential applicability to the design of biological corrosion-control measures.
机译:使用两种细菌检查了双物种生物膜对碳钢腐蚀的影响:铁还原剂希瓦氏菌(Shewanella oneidensis)(MR-1)和硫酸盐还原剂Des-ulfovibrio desulfuricans(G20)。这些实验利用了这样一个事实,即它们的新陈代谢产物(亚铁或硫化物)以相反的方式影响碳钢的腐蚀速率。电化学阻抗谱(EIS)显示,在短时间内,MR-1和G20的共培养可保护钢免受腐蚀。当存在增强腐蚀的细菌时,还原铁细菌可以抑制腐蚀这一事实值得进一步研究,因为其在生物腐蚀控制措施设计方面的潜在适用性。

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