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金属在缓蚀剂体系中的阳极极化曲线上存在着电流迅速增加而形成的电位平阶现象。逆向扫描极化时，这个电位平阶消失。这一现象起因于吸附在电极表面的缓蚀剂发生阳极脱附。文中提出用一电化学参数—脱附电位Ｅｄｅｓ来表征缓蚀剂阳极脱附现象。Ｅｄｅｓ是缓蚀剂大量脱附时的电位，其物理意义为缓蚀剂在电极表面因阳极极化而引起脱附速度稍大于其吸附速度。缓蚀剂阳极脱附速度取决于外加电位与脱附电位的差值。外加电位越正于脱附电位，缓蚀剂脱附速度越大；反之，缓蚀剂不发生阳极脱附。
Metal anodic polarization curve in the corrosion inhibitor system there is a rapid increase in current and the formation of potential flat phenomenon. Reverse sweep polarization, the potential disappears. This phenomenon is caused by anodic desorption of corrosion inhibitor adsorbed on the electrode surface. In this paper, an electrochemical parameter - desorption potential Edes is proposed to characterize the corrosion inhibitor anode desorption phenomenon. Edes is a large amount of corrosion inhibitor desorption potential, the physical meaning of the corrosion inhibitor on the electrode surface due to anodic polarization caused by the desorption rate slightly greater than its adsorption rate. Corrosion inhibitor anode desorption rate depends on the applied potential and desorption potential difference. The more the applied potential is at the desorption potential, the greater the desorption rate of the corrosion inhibitor; on the contrary, the corrosion inhibitor does not undergo anodic desorption.