Abstract

Hydrolyzed polyacrylamide (HPAM), a viscosity booster in the enhanced oil recovery process, has been found to be prone to microbial degradation. The effect of HPAM degradation on the electrochemical properties and corrosion behavior of C20 steel was examined in oilfield injection water containing sulfate-reducing bacteria (SRB). Microscopic and spectroscopic analyses showed that HPAM promoted SRB growth, which resulted in the precipitation of higher amount of ferrous sulfide in the test medium. Electrochemical investigations revealed that the HPAM biodegradation enhanced the corrosion rate and localized perforation of steel. These were possible because the HPAM degradation furnished the test medium with nutrients like acetate and ammonium ions, which sustained microbial activities, thus boosting the anodic dissolution of steel.

Graphical Abstract

中文翻译：

---

提高采收率聚丙烯酰胺凝胶中管线钢的硫酸盐还原菌腐蚀

摘要

水解聚丙烯酰胺 (HPAM) 是强化采油过程中的一种增粘剂，已被发现容易发生微生物降解。在含有硫酸盐还原菌 (SRB) 的油田注入水中检测了 HPAM 降解对 C20 钢电化学性能和腐蚀行为的影响。显微镜和光谱分析表明，HPAM 促进了 SRB 的生长，从而导致测试介质中硫化亚铁的沉淀量增加。电化学研究表明，HPAM 生物降解提高了钢的腐蚀速率和局部穿孔。这是可能的，因为 HPAM 降解为测试介质提供了醋酸盐和铵离子等营养物质，这些营养物质维持微生物活动，从而促进钢的阳极溶解。

图形概要