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2 X70钢电极在含不同浓度[VBIM]Cl、[VBIM]Br和[VBIM]I的0.5 mol/L H2SO4溶液中的极化曲线参数

Table 2 Polarization curve parameters of X70 steel electrode in 0.5 mol/L H2SO4 solutions with different concentrations of [VBIM]Cl, [VBIM]Br and [VBIM]I at 298 K

Inhibitor C / mmol·L-1 Ecorr SCE / V Icorr / mA·cm-2 -βc / mV·dec-1 βa / mV·dec-1 η / % Blank 0 -0.477 1.840 168.4 101.6 --- [VBIM]Cl 0.1 -0.468 1.463 167.0 108.0 20.5 0.5 -0.461 0.588 156.4 87.6 68.0 1 -0.466 0.374 146.1 83.4 79.7 2 -0.461 0.363 152.5 77.1 80.3 5 -0.463 0.286 151.9 76.8 84.5 [VBIM]Br 0.1 0.468 1.738 166.9 114.1 5.5 0.5 -0.469 1.415 164.9 98.4 23.1 1 -0.470 1.332 167.2 104.7 27.6 2 -0.470 1.227 173.2 114.6 33.3 5 -0.471 0.579 153.9 92.1 68.5 [VBIM]I 0.1 -0.478 0.747 145.0 91.9 59.4 0.5 -0.453 0.249 134.9 102.8 86.5 1 -0.433 0.086 130.2 105.4 95.4 2 -0.426 0.027 131.2 48.9 97.9 5 -0.399 0.010 140.5 37.4 99.4