J55钢在模拟CO2 注入井环空环境中的关键性腐蚀因素
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崔怀云, 刘智勇, 卢琳
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Critical Corrosion Factors for J55 Tubing Steel in a Simulated Annulus Environment of CO2 Injection Well
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CUI Huaiyun, LIU Zhiyong, LU Lin
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表5 J55钢在不同下的阻抗谱拟合数据
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Table 5 Fitting results of electrochemical impedance spectra of J55 steel with different
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| / MPa | Rs / Ω·cm2 | Qdl × 10-4 /Ω-1·cm-2·s-n | ndl | Rct / Ω·cm2 | RL / Ω·cm2 | L / H·cm-2 | Cf / F·cm-2 | Rpore / Ω·cm2 |
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| 4 | 7.10 | 6.23 | 0.812 | 56.67 | 217.9 | 112.3 | 1.349 | 12.77 | | 3 | 8.36 | 5.12 | 0.820 | 95.87 | 314.4 | 233 | 1.801 | 12.23 | | 2 | 7.80 | 5.12 | 0.817 | 115.1 | 449.2 | 451.7 | 1.386 | 10.84 | | 1 | 7.871 | 3.94 | 0.823 | 197.8 | 620.1 | 640 | 1.284 | 22.69 | | 0.1 | 6.163 | 2.84 | 0.847 | 268.7 | 933.2 | 1330 | 0.3175 | 25.57 |
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