界面缓蚀剂的吸附稳定性  

The Adsorption Stability of Interface Corrosion Inhibitor

作　　者：甘复兴[1] 汪的华[1] 邹津耘[1] 

机构地区：[1]武汉大学环境科学系

出　　处：《电化学》1999年第2期157-161,共5页Journal of Electrochemistry

基　　金：国家自然科学基金;金属腐蚀与防护国家重点实验室资助

摘　　要：研究表明：在一定条件下，阳极脱附电位可作为评价缓蚀剂吸附稳定性的一个经验参数；缓蚀剂吸脱附诱导的电化学振荡是缓蚀体系的一种特殊失稳状态，即缓蚀剂吸附过程与电极反应中间吸附态产物耦合的结果；卤素离子的协同作用不仅可以提高某些有机缓蚀剂的吸附复盖度，而且可以增强其吸附稳定性；Some new results on the adsorption stability of interface corrosion inhibitor are presented. The concept of adsorption stability and the factors influencing the adsorption stability were discussed. It is shown that the anodic desorption potential can be employed to evaluate the adsorption stability of the inhibitor as an empirical character in some conditions. Electrochemical oscillations phenomena were observed for the first time on a rotating iron electrode in H2SO4 solution containing organic inhibitor in the active potential region. These potentiostatic current oscillations can occur under cathodic polarization, as well as under anodic plarization. The oscillation period, amplitude, incubation time and waveform changed with the applied potential and electrode rotating speed. The oscillations sustained even with strong stirring, but were inhibited by the codsorption of organic molecules and halides. This periodic behavior of oscillation may be attributed to the cycle between the partial desorptioon the iron surface. The synergistic effect of organic molecules and halides ions may enhance the adsorption stability of the inhibitor on the metal surface. A differential polarization curve method was proposed to study the adsorption stability and anodic desorption behaviors of the inhibitor.

关 键 词：界面缓蚀剂 吸附稳定性 阳极脱附 缓蚀剂 

分 类 号：TG174.42[金属学及工艺—金属表面处理]