采用失重法、动电位扫描法、电化学交流阻抗法和SEM分析,研究了咪唑啉类缓蚀剂ZZF的缓蚀性能.结果表明：在50℃的5%HCl溶液中,4 mmol/L ZZF缓蚀剂能有效地提高碳钢的耐蚀性能；ZZF的缓蚀作用机理系几何覆盖效应,它在金属表面吸附成膜后,使阴极和阳极过程都受到了阻滞;ZZF试样膜质均匀、致密,厚度为6μm;根据EIS提出了相应的特征等效电路.
Inhibition performance of a complex imidazole inhibitor ZZF for carbon steel was studied by weight-loss measurement,potentiondynamic polarization curve and Electrochemical Impedance Spectroscopy(EIS).The results suggested that in 5% HCl solution at 50℃ the inhibitor ZZF could effectively prevent carbon steel from acid corrosion and the corrosion inhibition of ZZF followed a coverage mechanism.The anode and cathode processes were simultaneously suppressed due to a ZZF film covering the surface of carbon steel.In addition,based on the EIS display of absorption film on the surface of carbon steel,a equivalent circuit was proposed as its physical model.By scanning electron microscopy(SEM)observation,a netlike appearance can be clearly seen on the surface of the carbon steel treated in the solution with ZZF.The thickness of the film is about 6μm.
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