TP110TS和P110钢在CO2注入井环空环境中应力腐蚀行为比较

李清, 张德平, 李晓荣, 王薇, 孙宝壮, 艾池

Comparison of Stress Corrosion Behavior of TP110TS and P110 Steel in a Simulated Annular Environment of CO2 Injection Well

LI Qing, ZHANG Deping, LI Xiaorong, WANG Wei, SUN Baozhuang, AI Chi

表4 不同缓蚀剂浓度下TP110TS和P110钢的电化学等效电路图拟合结果

Table 4 Fitting results of EIS of TP110TS and P110 steels

Condition Rs / Ω·cm2 Qf / Ω-1·cm-2·Sn Rf / Ω·cm2 Qdl / Ω-1·cm-2·Sn Rct / Ω·cm2 TP110TS-0.4 g/L 33.17 2.306×10-9 395.1 3.581×10-6 1.122×104 TP110TS-1 g/L 1701 1.720×10-4 870.8 2.832×10-4 1.05×106 P110-0.4 g/L 713.4 1.057×10-10 3.64 2.569×10-1 0.631×104 P110-1 g/L 1.353×10-4 6.495×10-8 74.5 1.499×10-4 7.056×1015