食用香料1,4-二硫-2,5-二醇环保型缓蚀剂对X70钢在0.5 mol/L H2SO4溶液中的缓蚀性能研究

谭伯川, 张胜涛, 李文坡, 向斌, 强玉杰

Food Spices 2,5-Dihydroxy-1,4-dithiane as an Eco-friendly Corrosion Inhibitor for X70 Steel in 0.5 mol/L H2SO4 Solution

TAN Bochuan, ZHANG Shengtao, LI Wenpo, XIANG Bin, QIANG Yujie

表1 X70钢在298 K下含有不同浓度DDD的0.5 mol/L H2SO4溶液中浸泡时的EIS拟合参数

Table 1 Fitting parameters of EIS of X70 steel immersed at 298 K in 0.5 mol/L H2SO4 solutions without and with different concentrations of DDD

C / mmol·L-1 Rs / Ω·cm2 Y0×10-6 / S·sn·cm-2 n Cdl / μF·cm-2 Rct / Ω·cm2 L / Ω·cm2 RL / Ω·cm2 η / % Blank DDD 0.78 227.2 0.91 141.1 28.3 161.2 233.5 --- 0.5 2.24 163.2 0.89 101.3 125.1 155.3 179.2 77.4 1 0.78 107.4 0.91 72.7 163.7 --- --- 82.7 2 1.43 96.4 0.87 53.5 243.5 --- --- 88.4 5 0.93 53.7 0.90 34.5 443.4 --- --- 93.6