成品油输送管道微生物腐蚀案例分析

张斐, 王海涛, 何勇君, 张天遂, 刘宏芳

Case Analysis of Microbial Corrosion in Product Oil Pipeline

ZHANG Fei, WANG Haitao, HE Yongjun, ZHANG Tiansui, LIU Hongfang

表2 4种测试体系中X60碳钢的电化学阻抗图拟合所得电化学参数

Table 2 Electrochemical parameters fitted from EIS of X60 carbon steel in four test systems

Condition Rs / Ω·cm2 Qf / 10-4 F·cm-2 Qf-n Rf / Ω·cm2 Cdl / 10-2 F·cm-2 Cdl-n Rct / Ω·cm2 Rp / Ω·cm2 Medium 1 d 8.24 1.52×10-4 0.942 27348 2.71×10-4 0.841 15351 42699 3 d 6.847 2.15×10-4 0.946 13887 3.11×10-3 0.927 3562 17449 5 d 7.015 2.42×10-4 0.978 8446 3.45×10-4 0.873 9373 17819 8 d 6.915 3.12×10-4 0.945 17679 8.59×10-4 0.943 6298 23977 11 d 7.74 3.49×10-4 0.949 35676 8.23×10-4 0.922 11798 47474 14 d 7.63 4.40×10-4 0.953 47205 6.29×10-4 0.978 18193 65398 Oil-Medium 1 d 9.539 1.74×10-4 0.943 22410 2.82×10-4 0.854 14837 37247 3 d 8.362 2.12×10-4 0.947 6021 2.15×10-4 0.871 8600 14621 5 d 8.336 3.05×10-4 0.945 11289 7.57×10-4 0.875 4016 15305 8 d 11.11 3.68×10-4 0.950 33673 8.92×10-4 0.955 10177 43850 11 d 10.72 4.39×10-4 0.943 30237 3.94×10-4 0.953 15252 45489 14 d 11.39 4.65×10-4 0.952 39224 4.18×10-4 0.938 18966 58190 SRB solution 1 d 17.74 4.31×10-4 0.866 84.2 1.19×10-6 0.213 9144 9228.2 3 d 11.15 9.44×10-3 0.811 653.9 6.11×10-3 0.891 3567 4220.9 5 d 11.8 6.74×10-3 0.856 1780 3.98×10-3 0.872 7159 8939 8 d 13.31 3.74×10-3 0.924 7923 1.95×10-3 0.896 3749 11672 11 d 13.39 2.46×10-3 0.926 10844 1.09×10-4 0.913 17565 28409 14 d 13.73 2.19×10-3 0.925 18602 5.14×10-4 0.915 21160 39762 Oil-SRB solution 1 d 18.1 8.01×10-3 0.958 1502 7.53×10-5 0.303 11802 13304 3 d 15.79 1.68×10-3 0.934 4356 1.58×10-2 0.773 1268 5624 5 d 12.94 6.57×10-3 0.921 6523 7.59×10-5 0.975 13500 20023 8 d 14.51 5.25×10-3 0.924 7843 6.07×10-5 0.961 14799 22642 11 d 13.43 5.00×10-3 0.949 3351 3.87×10-4 0.976 15530 18881 14 d 13.97 4.58×10-3 0.987 1576 9.81×10-4 0.933 17548 19124