卤素阴离子对离子液体缓蚀性能的影响

冯丽, 张胜涛, 郑思远, 胡志勇, 朱海林, 马雪梅

Effect of Halogen Anions on Corrosion Inhibition of Ionic Liquids

FENG Li, ZHANG Shengtao, ZHENG Siyuan, HU Zhiyong, ZHU Hailin, MA Xuemei

表1 X70钢电极在不同浓度[VBIM]Cl、[VBIM]Br和[VBI M]I的 0.5 mol/L H2SO4溶液中的电化学阻抗数据

Table 1 Electrochemical impedance data of X70 steel electrode in 0.5 mol/L H2SO4 solutions containing different concentrations of [VBIM]Cl, [VBIM]Br and [VBIM]I at 298 K

Inhibitor C / mmol·L-1 Rs / Ω·cm2 Y0 / 10-5 Ω·cm2 n Cdl / μF·cm-2 Rct / Ω·cm2 L / Ω·cm2 RL / Ω·cm2 η / % Blank 0 0.93 17.75 0.90 98.5 23.70 71.0 181.0 --- [VBIM]Cl 0.1 1.18 17.65 0.89 94.5 29.30 222.4 152.0 19.1 0.5 1.21 17.25 0.86 94.3 54.53 346.3 460.4 56.5 1 1.42 16.13 0.85 87.0 75.16 297.2 395.4 68.5 2 1.09 16.52 0.83 83.1 81.24 551.6 495.1 70.8 5 1.35 17.18 0.80 80.9 108.40 961.5 593.6 78.1 [VBIM]Br 0.1 1.22 17.61 0.89 98.1 24.80 144.1 112.7 4.4 0.5 0.93 16.94 0.90 96.0 29.45 284.8 148.5 19.5 1 1.67 14.71 0.85 95.7 32.07 105.9 183.6 26.1 2 1.68 13.81 0.94 94.9 37.24 588.0 225.6 36.4 5 1.37 12.44 0.82 84.7 58.81 176.2 406.4 59.7 [VBIM]I 0.1 0.77 15.93 0.90 90.8 49.40 100.1 347.0 52.0 0.5 0.74 13.72 0.88 79.8 140.90 155.5 567.0 83.2 1 0.90 10.06 0.87 58.2 285.60 --- --- 90.8 2 0.67 7.33 0.89 47.7 402.20 --- --- 94.1 5 1.02 5.51 0.91 39.9 669.10 --- --- 96.5