Department of Chemical & Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, 45701, USA.
Research and Development Center, Saudi Arabian Oil Company, Dhahran, 31311, Saudi Arabia.
World J Microbiol Biotechnol. 2021 Sep 14;37(10):174. doi: 10.1007/s11274-021-03134-y.
Microbiologically influenced corrosion (MIC) is one of the major corrosion threats in the oil and gas industry. It is caused by environmental biofilms. Glutaraldehyde is a popular green biocide for mitigating biofilms and MIC. This work investigated the efficacy of glutaraldehyde enhancement by food-grade green chemical D-limonene in the biofilm prevention and MIC mitigation using a mixed-culture oilfield biofilm consortium. After 7 days of incubation at 37 °C in enriched artificial seawater in 125 mL anaerobic vials, the 100 ppm (w/w) glutaraldehyde + 200 ppm D-limonene combination treatment reduced the sessile cell counts on C1018 carbon steel coupons by 2.1-log, 1.7-log, and 2.3-log for sulfate reducing bacteria, acid producing bacteria, and general heterotrophic bacteria, respectively in comparison with the untreated control. The treatment achieved 68% weight loss reduction and 78% pit depth reduction. The 100 ppm glutaraldehyde + 200 ppm D-limonene combination treatment was found more effective in biofilm prevention and MIC mitigation than glutaraldehyde and D-limonene used individually. Electrochemical tests corroborated weight loss and pit depth data trends.
微生物影响腐蚀（MIC）是石油和天然气行业面临的主要腐蚀威胁之一。它是由环境生物膜引起的。戊二醛是一种流行的绿色杀生剂，可用于减轻生物膜和 MIC。本工作研究了食品级绿色化学物质 D-柠檬烯增强戊二醛在生物膜预防和 MIC 缓解中的功效，使用混合培养的油田生物膜联合体。在 37°C 下在 125 mL 厌氧小瓶中的富人工海水中孵育 7 天后，与未处理的对照相比，100 ppm（w/w）戊二醛+200 ppm D-柠檬烯组合处理分别使硫酸盐还原菌、产酸菌和一般异养菌在 C1018 碳钢试片上的固定细胞计数减少了 2.1-log、1.7-log 和 2.3-log。该处理实现了 68%的重量损失减少和 78%的凹坑深度减少。与单独使用戊二醛和 D-柠檬烯相比，100 ppm 戊二醛+200 ppm D-柠檬烯组合处理在生物膜预防和 MIC 缓解方面更有效。电化学测试证实了重量损失和凹坑深度数据的趋势。
