Fe/HCl体系中缓蚀剂吸脱附诱导的电流/电位振荡  

CURRENT/POTENTIAL OSCILLATIONS INDUCED BY ADSORPTION AND DESORPTION OF INHIBITOR IN Fe/HCl MEDIUM

作　　者：江俊伟[1,2] 汪的华[1,2] 甘复兴 

机构地区：[1]武汉大学资源与环境科学学院,武汉430072 [2]金属腐蚀与防护国家重点实验室

出　　处：《腐蚀科学与防护技术》2002年第2期89-91,共3页Corrosion Science and Protection Technology

摘　　要：研究了HCl介质中活性电位区有机缓蚀剂在Fe电极表面吸脱附诱导产生的电化学振荡现象 ,及缓蚀剂浓度、电极电位和溶液搅拌等因素对振荡行为的影响 .结果表明 ,在HCl介质中Fe电极的活性电位区同样得到了规整的电流振荡波 ,但相同条件下的振荡行为要弱于H2 SO4介质中 .随缓蚀剂浓度升高 ,振荡波的周期变长 ,振荡减弱 ;由阴极到阳极 ,电流振荡波形不同 ,周期也有所增长 ;搅拌对电流振荡无明显影响 .Electrochemical oscillations in HCl medium induced by the adsorption and desorption of the organic inhibitor on a rotating iron electrode in the active potential region of iron are observed and investigated.The effects of the inhibitor concentration,potential and stirring on the oscillation are studied.The results show that in the HCl medium the regular current oscillation waves are measured in the active potential region of iron electrode too,however the oscillations are feebler than those in the H 2SO 4 medium;The higher the concentration of the organic inhibitor,the longer the period is and the feebler the oscillations is;With the increase of the potential from cathode to anode,the oscillation waveform is changed and the period becomes longer;Furthermore,the stirring doesn't influence the electrochemical oscillation obviously.At the same time,a new potential oscillation is observed in the system.

关 键 词：缓蚀剂 吸脱附 电化学振荡 铁/氯化氢体系 

分 类 号：TG174.42[金属学及工艺—金属表面处理]