2-氨基嘧啶在盐酸介质中对钢的缓蚀性能  

Corrosion Inhibition of 2-Aminopyrimidine for Steel in Hydrochloric Acid Media

作　　者：李向红[1] 邓书端[2] 付惠[1] 

机构地区：[1]西南林业大学理学院,昆明650224 [2]西南林业大学材料工程学院,昆明650224

出　　处：《应用化学》2012年第2期209-215,共7页Chinese Journal of Applied Chemistry

基　　金：云南省教育厅自然科学研究基金项目(09C0181)

摘　　要：用失重法、动电位极化曲线和电化学阻抗谱(EIS)研究了2-氨基嘧啶(2-AP)在1.0～5.0 mol/L HCl溶液中(20～50℃)对冷轧钢的缓蚀作用。结果表明,2-AP对冷轧钢在1.0 mol/L HCl中具有良好的缓蚀作用,且在钢表面的吸附符合校正的Langmuir吸附模型;缓蚀率随缓蚀剂浓度的增加而增大,但随温度的升高和HCl浓度的增加而降低。2-AP为混合抑制型缓蚀剂;EIS谱呈半圆容抗弧,电荷转移电阻随缓蚀剂浓度的增加而增大。The inhibition effect of 2-aminopyrimidine （2-AP） on the corrosion of cold rolled steel （CRS） in 1.0 -5.0 mol/L HCl media at 20 - 50 ℃ has been studied by mass loss, potentiodynamic polarization curves and electrochemical impedance spectroscopy （EIS） methods. The results showed that the neutral 2-AP is a good inhibitor for CRS, and the adsorption of 2-AP on the CRS surface follows the amended Langmuir adsorption isotherm equation. Inhibition efficiency increases with the inhibitor concentration, while decreases with temperature and the concentration of HCl. Polarization curves showed that 2-AP is a mixed-type inhibitor. EIS spectra exhibited one capacitive loop, and the charge transfer resistance increased with the inhibitor 2-AP concentration.

关 键 词：氨基嘧啶 盐酸 冷轧钢 缓蚀 吸附 

分 类 号：O646.6[理学—物理化学]