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2 X70钢在不同温度下浸泡在含有不同浓度DDD的0.5 mol/L H2SO4溶液中EIS的拟合参数

Table 2 Fitting parameters of EIS of X70 steel immersed at different temperatures in 0.5 mol/L H2SO4 solutions without and with different concentrations of DDD

T / K 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 / % 298 0 0.78 227.2 0.91 141.1 28.3 161.2 233.5 --- 5 0.93 53.7 0.90 34.5 443.4 --- --- 93.6 303 0 0.88 193.6 0.93 100.3 25.1 215 235.6 --- 5 0.92 68.5 0.91 47.2 365.7 --- --- 93.1 308 0 1.85 316.5 0.87 155.2 23.5 51.1 169.5 --- 5 1.36 67.1 0.88 40.8 338.1 --- --- 93.0 313 0 0.57 160.2 0.97 134.3 18.1 182.4 134.1 --- 5 1.30 84.2 0.90 55.6 254.8 --- --- 92.8