咪唑啉类衍生物缓蚀性能研究

刘建国,高歌,徐亚洲,李自力,季菀然

Corrosion Inhibition Performance of Imidazoline Derivatives

Jianguo LIU,Ge GAO,Yazhou XU,Zili LI,Wanran JI

表4 20#碳钢在不同温度下含有不同浓度十六烷基咪唑啉的3.5%NaCl溶液中的极化曲线拟合参数

Table 4 Fitting parameters of polarization curves of 20# carbon steel in 3.5%NaCl solutions containing different concentrations of sixteen alkyl imidazoline at different temperatures

Concentration / mg·L-1 Temperature / ℃ Ecorr/ mV Icorr/ μA·cm-2 Ba/ mV Bc/ mV fa fc IE / % 140 25 -634.242 8.384 31.33 197.26 0.00742 0.08796 83.09 30 -639.918 10.34 53.62 372.76 0.00708 0.08725 85.98 40 -645.157 2.72 51.87 553.95 0.00173 0.02239 96.36 50 -617.773 24.80 63.89 635.89 0.00124 0.05545 84.74 60 -654.449 33.15 76.46 548.86 0.01833 0.18408 81.54 200 25 -639.918 3.1 27.15 260.48 0.01035 0.04114 79.14 30 -659.89 7.23 41.34 352.31 0.02505 0.09275 93.44 40 -643.29 2.9 42.23 445.12 0.00967 0.03690 95.37 50 -628.306 14.5 39.17 662.15 0.01421 0.10283 95.66 60 -631.844 15.42 21.15 192.46 0.01749 0.09893 96.76 300 25 -645.17 2.72 59.56 223.38 0.00951 0.03931 94.51 30 -698.14 2.31 47.43 121.89 0.01589 0.03412 96.3 40 -658.34 2.76 55.22 150.67 0.01824 0.04050 95.6 50 -626.807 11.87 30.64 662.16 0.01045 0.09359 94.26 60 -645.422 15.39 23.36 351.23 0.02118 0.11130 93.78 600 25 -617.773 2.48 32.33 119.21 0.00001 0.02445 94.78 30 -631.101 3.539 44.80 533.89 0.00001 0.03297 94.34 40 -641.18 3.56 55.51 260.38 0.00001 0.03276 95.32 50 -653.04 10.95 35.65 261.7 0.00006 0.06675 95.17 60 -647.16 13.35 24.76 221.87 0.00011 0.07276 96.54