石油管材用含Cu钢焊接接头的微生物腐蚀研究

燕冰川, 曾云鹏, 张宁, 史显波, 严伟

Microbiologically Influenced Corrosion of Cu-bearing Steel Welded Joints for Petroleum Pipes

YAN Bingchuan, ZENG Yunpeng, ZHANG Ning, SHI Xianbo, YAN Wei

表3 EIS数据拟合结果

Table 3 Fitting results of EIS data

Area Time / d Rs / Ω·cm2 Yf / S·s n ·cm-2 nf Rf / Ω·cm2 Ydl / S·s n ·cm-2 ndl Rct / Ω·cm2 χ2 BM 1 339 5.77 × 10-4 0.607 195 3.61 × 10-4 0.924 3.70 × 105 2.97 × 10-5 4 323 6.55 × 10-4 0.629 147 2.43 × 10-4 0.911 3.85 × 105 5.82 × 10-4 7 268 6.72 × 10-4 0.640 93.3 2.19 × 10-4 0.914 4.02 × 105 1.29 × 10-4 10 246 7.23 × 10-4 0.632 73.5 1.97 × 10-4 0.916 4.06 × 105 1.03 × 10-4 14 238 5.54 × 10-4 0.688 44.2 1.77 × 10-4 0.900 4.39 × 105 3.23 × 10-4 WM 1 320 3.02 × 10-4 0.779 101 4.26 × 10-4 0.897 2.33 × 105 9.16 × 10-4 4 305 2.85 × 10-4 0.813 66.8 3.23 × 10-4 0.877 3.32 × 105 6.94 × 10-4 7 246 7.07 × 10-4 0.760 88.2 7.62 × 10-4 0.868 3.35 × 104 1.16 × 10-4 10 231 2.30 × 10-4 0.731 37.7 2.81 × 10-4 0.880 3.14 × 105 3.28 × 10-4 14 135 1.46 × 10-3 0.660 274 3.09 × 10-3 0.938 8.86 × 104 1.02 × 10-4 HAZ 1 279 3.40 × 10-4 0.760 87.3 3.85 × 10-4 0.866 3.45 × 105 9.38 × 10-4 4 262 3.79 × 10-4 0.755 88.3 3.92 × 10-4 0.870 3.47 × 105 1.92 × 10-4 7 255 6.99 × 10-4 0.722 125 6.47 × 10-4 0.893 4.09 × 104 1.38 × 10-4 10 213 3.00 × 10-4 0.792 46.0 3.23 × 10-4 0.878 2.20 × 105 4.98 × 10-4 14 148 1.43 × 10-4 0.703 193 3.03 × 10-3 0.937 9.46 × 104 1.21 × 10-4