Mitigating microbiologically influenced corrosion of an oilfield biofilm consortium on carbon steel in enriched hydrotest fluid using 2,2-dibromo-3-nitrilopropionamide (DBNPA) enhanced by a 14-mer peptide

• 作者: Di Wang Mahmoud Ramadan Sith Kumseranee Suchada Punpruk Tingyue Gu
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（22）
• 页码范围: 146-152
• 页数: 7页
• 语种: 英文

摘要

In the oil and gas industry,microbiologically influenced corrosion (MIC) is a major threat to hydrotest,a procedure which is required to certify whether a pipeline can be commissioned.Seawater is frequently used as a hydrotest fluid.In this biofilm prevention lab study,an oilfield biofllm consortium was grown in an enriched artificial seawater anaerobically at 37 ℃ for 60 days.The combination of 100 ppm (w/w) 2,2-dibromo-3-nitrilopropionamide (DBNPA) + 100 nM (180 ppb) Peptide A (a biofilm dispersal agent) led to extra SRB (sulfate reducing bacteria),APB (acid producing bacteria) and GHB (general heterotrophic bacteria) sessile cell count reductions of 0.9-log,0.8-log and 0.6-log,respectively,compared with the outcome obtained by using 100 ppm DBNPA only.The Peptide A enhancement also led to extra reductions of 44 ％ in weight loss,43 ％ in maximum pit depth,and 54 ％ in corrosion current density.