采用失重法和电化学法测试了不同浓度的一种油田用咪唑啉缓蚀剂在模拟油田现场环境中的缓蚀率。结果表明, 该缓蚀剂为混合抑制型缓蚀剂, 以阳极抑制为主, 质量浓度在200 mg·L-1时缓蚀率趋于稳定, 最高缓蚀率可达97.6％。电化学阻抗测试表明, 在不加缓蚀剂的电化学阻抗谱中具有三个时间常数, 随着缓蚀剂浓度的增加, 表层膜的的覆盖率θ越来越大, 高频区的感抗弧消失, 只有高频区和低频区的容抗弧两个时间常数。

Weight-loss method and electrochemical method were used to analyze the inhibition efficiency of an imidazolin inhibitor in a simulated oil field environment. The results show that the inhibitor is a multi-control type, while the anodic control is the main reason. The inhibitor had a corrosion inhibiting efficiency of 97.6% with an economical concentration about 200 mg·L-1. The EIS results show that there were three time constants in the solutions without inhibitor. With the increase of the inhibitor concentration, the inhibition efficiency increased and the inhibition coverage rate also increased. There were two time constants in high inhibition concentration, corres ponding to the capacitance arc in high and low frequency regions.