以松香和二乙烯三胺为原料合成了松香基咪唑啉,并采用氯乙酸钠对合成产物进行季铵化改性,得到水溶性松香基咪唑啉季铵盐.通过失重法和电化学方法测试了该季铵盐在60℃的CO2饱和3%NaCl溶液中对Q235钢的缓蚀性能.结果表明,水溶性松香基咪唑啉季铵盐对Q235钢有很好的缓蚀作用,150 mg/L用量时缓蚀率超过90%.该缓蚀剂是一种以阳极抑制为主的缓蚀剂,遵循Langmuir吸附等温式,在钢表面发生自发吸附,存在较强的吸附作用力. The rosin-based imidazoline was synthesized from rosin and diethylenetriamine, and the product was quaternized with sodium chloroacetate to obtain the water-soluble rosin-based imidazolinium quaternary ammonium salt.The results of weight loss and electrochemical methods The corrosion inhibition performance of the quaternary ammonium salt to Q235 steel in CO2 saturated 3% NaCl solution at 60 ℃ showed that the water-soluble rosin-based imidazoline quaternary ammonium salt had a good corrosion inhibition effect on Q235 steel and the corrosion inhibition rate of Q235 steel was 150 mg / L, the corrosion inhibition rate is more than 90% .It is a kind of corrosion inhibitor mainly based on anode inhibition. Following Langmuir adsorption isotherm, spontaneous adsorption occurs on the steel surface, and there is strong adsorption force.