Interaction of Sulfate-Reducing Bacteria and Carbon Steel Q 235 in Biofilm

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• 作者：Cheng Sun ; Jin Xu ; Fuhui Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：November 16, 2011
• 年：2011
• 卷：50
• 期：22
• 页码：12797-12806
• 全文大小：1343K
• 年卷期：v.50,no.22(November 16, 2011)
• ISSN：1520-5045

文摘

The effect of sulfate-reducing bacteria (SRB) on corrosion of carbon steels and interaction between SRB and the carbon steel Q 235 are investigated in soil-extract solutions (SES). The results show that corrosion rates are smaller in the SES with SRB during growing period of SRB, but bigger during dying period. The procedures of interactions of SRB and the steel are studied by scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDXA). SRB do not aggregate on the surface of the steel until an anaerobic space is formed. SRB defend themselves against free oxygen by absorbing substances containing nonfree oxygen.