石油与天然气化工2025，Vol.54Issue(3)：116-122,7.DOI:10.3969/j.issn.1007-3426.2025.03.016
Cl-对CO2饱和页岩气压裂液中N80钢和TP125V钢腐蚀行为研究
Effect of Cl-content on the corrosion behavior of N80 and TP125V steel in CO2-saturated shale gas fracturing fluid
摘要
Abstract
Objective In response to the complex corrosion environment in the shale gas field,the effect of Cl-content on the corrosion behavior of N80 steel and TP125V steel were explored under the condition of simulating CO2-saturated shale gas fracturing fluid environment.Method The influence of 5 000-30 000 mg/L Cl-mass concentration on the corrosion of N80 steel and TP125V steel was analyzed with weight loss method,surface analysis and electrochemical method.Result With the increase of Cl-mass concentration from 5 000 mg/L to 30 000 mg/L,the corrosion rate of N80 steel increased from 0.019 mm/a to 0.025 mm/a,and the corrosion rate of TP125V steel increased from 0.021 mm/a to 0.030 mm/a.The higher the Cl-mass concentration was,the more corrosion pits on the surface of the specimens increased,and the larger diameter of the pits became according to the surface morphology analysis of the specimens.Electrochemical testing indicated that as Cl-mass concentration gradually increased,the polarization resistance(Rp)of N80 steel gradually decreased,while the corrosion current(Icorr)gradually increased,further indicating that corrosion is more severe.Conclusion The increase of Cl-content can promote the corrosion of N80 and TP125V steel in a CO2-saturated shale gas fracturing fluid environment.关键词
Cl-/腐蚀/页岩气/N80钢/TP125V钢Key words
Cl-/corrosion/shale gas/N80 steel/TP125 V steel引用本文复制引用
彭林彩,陈文,王智,余华利,霍绍全,蒲铭凯,徐聪丽..Cl-对CO2饱和页岩气压裂液中N80钢和TP125V钢腐蚀行为研究[J].石油与天然气化工,2025,54(3):116-122,7.基金项目
中国石油西南油气田公司科研项目"非常规生产系统抗生物膜型杀菌剂的研究"(20230305-13) （20230305-13）
