复配缓蚀剂在油水混合液中的缓蚀性能

以2-巯基苯并咪唑（MBI）为缓蚀剂，MBI与十六烷基三甲基溴化铵(CTAB)为复配缓蚀剂，考察其在模拟油田情况下对20#钢的缓蚀性能的影响。采用SEM和AES考察缓蚀剂使用前后碳钢的表面形貌和各元素含量，利用腐蚀速率快速评定仪对20#钢材料的腐蚀速率进行测定，由电化学工作站测试20#钢的极化曲线和交流阻抗曲线。实验结果表明，当测试温度为30℃时，单独使用MBI对20#钢有一定缓蚀效果， MBI质量浓度为1.98g/L时缓蚀效率最高，为86.04%；当采用MBI+CTAB复配缓蚀剂时，缓蚀效果优于单独使用MBI时的缓蚀效果， CTAB质量浓度为0.3g/L时缓蚀效率达到95.87%。

The corrosion inhibition performance of complex inhibitors in oil-water mixtures

We compared the corrosion inhibition performance with 20# steel of 2-mercaptobenzimidazole (MBI) as a single inhibitor, and MBI and cetyltrimethylammonium bromide (CTAB) as a complex inhibitor. The surface morphology and elemental composition of the carbon steel were analyzed by scanning electron microscopy (SEM) and Auger electronic spectroscopy (AES). A corrosion rate assessment instrument was used to test the corrosion rate of materials, and polarization curves and electrochemical impedance curves were analyzed using an electrochemical workstation. The results showed that MBI has reasonable corrosion inhibition performance for 20# steel at a temperature of 30℃ and when the MBI concentration was 1.98g/L the inhibition efficiency reached 86.04%. When MBI and CTAB were used as a complex inhibitor, the inhibition effect was better than when using MBI alone and the inhibition efficiency reached 95.87% when the concentration of CTAB was 0.3g/L.