H2S分压对13Cr不锈钢在CO2注气井环空环境中应力腐蚀行为的影响

王峰, 韦春艳, 黄天杰, 崔中雨, 李晓刚

Effect of H2S Partial Pressure on Stress Corrosion Cracking Behavior of 13Cr Stainless Steel in Annulus Environment Around CO2 Injection Well

WANG Feng, WEI Chunyan, HUANG Tianjie, CUI Zhongyu, LI Xiaogang

表2 13Cr不锈钢在不同H2S分压下的EIS谱拟合结果

Table 2 Fitted electrochemical parameters for EIS of 13Cr stainless steel under different H2S partial pressures

H2S partial pressure / MPa Rs / Ωcm2 Qf / μFcm-2 n1 Rf / Ωcm2 CPEdl / μFcm-2 n2 Rct / Ωcm2 0 18.45 8.79×10-5 0.91 9.51×104 2.97×10-4 0.99 4.40×104 0.05 16.66 1.20×10-4 0.862 7.54×104 5.50×10-4 1 2.40×104 0.10 18.12 2.00×10-5 1 10.18 8.30×10-5 0.817 5.13×104 0.20 16.78 1.95×10-5 1 7.9 1.01×10-4 0.814 3.60×104 0.30 18.45 6.30×10-5 0.623 568.4 4.89×10-5 0.867 3.58×104