含氧注气驱高Ca2+ 浓度工况下C110钢腐蚀产物膜演变及腐蚀行为研究

赵密锋, 胡芳婷, 刘艳明, 宋文文, 谢俊峰, 吕祥鸿, 代盼, 胡航波

Evolution of Corrosion Products Film and Corrosion Behavior of C110 Steel Under High-temperature and High-pressure O2-CO2 Atmosphere in a Simulated Drilling Fluid with High Mineral Content and High Concentration of Ca2+

ZHAO Mifeng, HU Fangting, LIU Yanming, SONG Wenwen, XIE Junfeng, LV Xianghong, DAI Pan, HU Hangbo

表3 C110钢在不同氧分压环境下腐蚀72 h的阻抗谱拟合结果

Table 3 Impedance spectrum fitting results of C110 steel corroded at different oxygen partial pressures for 72 h

PO2 / MPa Rs / Ω·cm2 Qdl / 10-5 F/cm2 Rct / Ω·cm2 Qf / 10-4 F·cm-2 Rf / Ω·cm2 L / H·cm-2 RL / Ω·cm2 0 0.01 84.57 66.35 3.34 13060 - - 0.004 1.55 14.03 2.94 10.22 1997 - - 0.04 2.55 3.31 1.55 26.21 1097 - - 0.4 1.13 169.60 5.15 13.53 3.20 20.47 60.68