自组装席夫碱缓蚀膜在油田水中对碳钢的缓蚀行为

Inhibition Behavior of Self-assembled Films of Schiff Base for Crabon Steel in Oilfield Water

碳钢表面自组装邻氧乙酸苯甲醛缩间氨基苯甲酸二钾席夫碱(K_2L2)缓蚀膜。采用极化曲线、电化学阻抗谱和扫描电镜研究了自组装缓蚀膜在模拟实际工作环境中对碳钢的缓蚀性能。结果表明:矿化度、温度、pH、流动状态和H_2S含量对自组装缓蚀膜在CO_2饱和油田水中的缓蚀性能具有一定的影响,但仍有较高的缓蚀率,当油田水中H_2S质量分数为200mg/L时,缓蚀率达到80.0%。

Self-assembled inhibition films were prepared by 2-[（3-carboxyl）phenyl iminomethyane]phenoxy acetic acid Schiff base（K_2L2）on carbon steel surface,and the inhibition performance for carbon steel in the environment of the actual work was studied by polarization curve,electrochemical impedance spectroscopy and scanning electron microscopy（SEM）.The results indicated that the oil water salinity,temperature,pH value,flow velocity and H_2S concentration had infulences on the inhibition perpormance of self-assembled films of K_2L2 in saturation CO_2 oilfield water,but there was still a higher inhibition efficiency,and the inhibition efficiency of self-assembled films of K_2L2 still reached 80.0% with 200mg/L H_2S in oilfield water.