温度对5Cr钢在模拟油田高温高压环境中CO2 腐蚀行为的影响
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赵国仙, 刘冉冉, 丁浪勇, 张思琦, 郭梦龙, 王映超
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Effect of Temperature on CO2-inducedCorrosion Behavior of 5Cr Steel in a Simulated Oilfield Produced High-temperature and High-pressured Water
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ZHAO Guoxian, LIU Ranran, DING Langyong, ZHANG Siqi, GUO Menglong, WANG Yingchao
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表5 5Cr钢90℃温度下浸泡不同时间后阻抗谱拟合结果
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Table 5 Fitting parameters of EIS of 5Cr steel immersed at 90oC for different time
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Time d | Rs Ω·cm2 | Cf μF·cm-2 | Rt Ω·cm2 | Ydl(Ydl1) S·s n ·cm-2 | ndl(ndl1) | Ydl2 S·s n ·cm-2 | ndl2 | Rc1 Ω·cm2 | Rc2 Ω·cm2 | Lθ H·cm2 | RL Ω·cm2 |
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| 0 | 0.8580 | 13.0 | 52.60 | 7.841 × 10-4 | 0.6048 | / | / | 1117.0 | / | / | / | | 1 | 0.6924 | 1.7 | 2.29 | 1.562 × 10-4 | 0.7939 | / | / | 1317.0 | / | 41.86 | 30.76 | | 3 | 1.6320 | 4.3 | 5.29 | 3.556 × 10-4 | 0.7390 | / | / | 1511.0 | / | 81.65 | 31.42 | | 7 | 6.4520 | 12.7 | 172.19 | 1.063 × 10-4 | 0.3839 | 18.850 × 10-4 | 0.7600 | 177.2 | 5623.7 | / | / | | 12 | 1.1710 | 32.4 | 179.20 | 5.494 × 10-4 | 0.5940 | 15.240 × 10-4 | 0.6762 | 212.9 | 5277.8 | / | / | | 14 | 4.2420 | 41.2 | 136.28 | 12.900 10-4 | 0.6576 | 3.193 × 10-4 | 0.5784 | 123.2 | 5996.4 | / | / |
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