利用脂肪酸与多胺合成咪唑啉, 对咪唑啉进行改性得到一种新型含硫磷的咪唑啉类缓蚀剂HGY-T。通过高温高压动态测试和电化学方法研究了HGY-T在温度为80 ℃, CO2分压为1 MPa高矿化度的模拟油田水中的缓蚀性能。结果表明, 在高温高压二氧化碳介质中, 50 mg/L的缓蚀剂就有很好的缓蚀性能, 腐蚀速率低于0.076 mm/a, 缓蚀率达到95%。该缓蚀剂为阳极型缓蚀剂, 遵循Frumkin吸附等温式。

A new kind of modified imidazoline corrosion inhibitor containing sulfur and phosphor was synthesized using fatty acid and polyamine. The inhibition effect of modified imidazoline HGY-T was investigated using autoclave and electrochemical method in simulated well producing water saturated with 1 MPa CO2 at 80 ℃. The results showed that in the medium with high pressure and high temperature CO2, the corrosion rate of steel was less than 0.076 mm/a with adding 50 mg/L inhibitor. The modified imidazoline is an anodic inhibitor and obeys the Frumkin adsorption isothermal equation.