以桐油为原料合成了桐油酸,使之先后与二乙烯三胺和氯化苄反应,制备了桐油酸咪唑啉苄基氯季铵盐,对其结构进行了红外表征。利用失重法和动电位极化曲线考察了合成的季铵盐在盐酸溶液中对N80钢的缓蚀性能。结果表明,桐油酸咪唑啉季铵盐能有效抑制N80钢在盐酸介质中的腐蚀;随着缓蚀剂浓度的增大,缓蚀效率增加;随着温度升高,腐蚀速率增大,缓蚀效率减小;随着盐酸浓度的增大,N80钢的腐蚀速率增大,缓蚀剂的缓蚀效率变化不明显;该缓蚀剂为阴极抑制为主的混合型缓蚀剂。
Quaternary ammonium salt of elacostearic imidazoline was synthesized by using elaeostearic acid,diethylenetriamine and benzyl chloride as the starting materials.The structure of the product was characterized by FITR spectrum.And its corrosion inhibition performance on N80 steel in HCl solution was investigated by weight loss and potentiodynamic polarization curve methods.The results show that the corrosion of N80 steel in HCl solution was inhibited in the presence of quaternary ammonium salt of elacostearic imidazoline.The corrosion inhibition efficiency of the product increased with the rise of inhibitor concentration.The corrosion rate of N80 steel increased with the rise of temperature and concentration of HCl solution,and the increase of HCl concentration did not change the corrosion inhibition efficiency of the inhibitor.Electrochemical results show that the quaternary ammonium salt is a mixed type inhibitor and mainly controls the cathodic reaction of N80 steel.
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