硫脲基松香咪唑啉季铵盐 对A3碳钢的缓蚀性能研究

合成了硫脲基松香咪唑啉季铵盐，对其结构进行了红外和核磁表征。采用失重法、动电位极化曲线、交流阻抗以及接触角测试分析了目标产物在质量分数为15%HCl溶液中对A3碳钢的缓蚀性能。采用AFM以及XPS测试对产物的吸附膜进行了表征。结果表明：目标产物的缓蚀效率随添加质量分数的增加先增大后减小，当目标产物质量分数增加到占盐酸质量的0.4%时，缓蚀效率最高达到90.78%；此物质是一种阴极控制为主的混合型缓蚀剂；AFM以及XPS结果证实目标产物确实可以在碳钢表面形成缓蚀剂吸附膜。

The Study on Corrosion Inhibition Performance of Thiourea Base Rosin Imidazoline Quaternary Ammonium Salt for A3 Mild Steel

Thiourea base rosin imidazoline quaternary ammonium salt was synthesized,and the structure of thiourea base rosin imidazoline quaternary ammonium salt was characterized by FT-IR and 13C NMR.The static weight-loss method,potentiodynamic polarization test,electrochemical impedance spectroscopy test and contact angle test were conducted to investigate the corrosion performance of target product for A3 carbon steel in the mass fraction of 15% hydrochloric acid solution.The adsorption film of the product was characterized by atomic force microscope test and X-ray electron spectroscopy test.The results showed that the corrosion inhibition efficiency of the product increases first and then decreases with the increase of the mass fraction of the product,and the highest inhibition efficiency reached 90.78% at the product mass fraction is the quality of hydrochloric acid 0.4%;This product acted as the mixed type corrosion inhibitor dominated by cathode;AFM and XPS results show that the target product can form inhibitor adsorption film on the surface of carbon steel.