表面活性剂溶液中铁极化曲线的测定  

Research on the Polarization Curves of Iron Electrode in Surfactant Aqueous Solution

作　　者：张晓冉[1] 王伟[1] 郝艳玲[1] 刘杰[1] 魏西莲[1] 

机构地区：[1]聊城大学山东省化学储能与新型电池技术重点实验室,山东聊城252059

出　　处：《聊城大学学报（自然科学版）》2013年第1期49-52,共4页Journal of Liaocheng University:Natural Science Edition

基　　金：山东省自然科学基金资助(ZR2012BQ013);聊城大学化学化工部教学专项资金(JX201004);聊城大学大学生科技文化创新基金(SF2012046)

摘　　要：碳钢极化曲线的测定对实际应用有着重要的指导意义,因此本实验采用恒电位法测定了碳钢电极在添加不同表面活性剂(SDS,DTAB,CTAB,Tween-80)的碳酸铵溶液中的阳极极化曲线,研究了表面活性剂的种类和浓度对碳钢电极缓蚀效应的影响.实验结果表明:几种表面活性剂的加入均对碳钢电极有较好的缓蚀作用,可以减小极化曲线的峰值电流.不同类型的表面活性剂在不同浓度下对碳钢电极的腐蚀钝化具有不同的影响,表现出不同的峰值电流.表面活性剂的浓度越大,其缓蚀作用越强,峰值电流越小.在相同的条件下四种表面活性剂对碳钢电极缓蚀效应的影响顺序为:Tween-80缓蚀效应最强,DTAB和CTAB次之,SDS最差.据推测该缓蚀效率与表面活性剂所带电荷及其在碳钢电极表面上的吸附有关.Research on the polarization curves of iron electrode is of importance to direct its applica- tions, thus the anode polarization of iron electrode in ammonium carbonate solution by addition of sur- factant was measured using the potentiostatic method, and the anticorrosive effect caused by the species and concentration of the surfactant had been investigated. The results showed that the addition of sever- al surfactants inhibited the corrosion of iron electrode to some extent, inducing the Marrease of the peak value current. The peak value current was influenced obviously by the species and concentration of the surfactant. The higher the surfactant concentration was, the stronger the anticorrosive effect became. Under the same conditions, the anticorrosive effect CTAB〉SOS. It was supposed that the efficiency of was in the order as follows： Tween-80〉DTAB≈ inhibition was related to the charge of the surfactantand the adsorptive behavior on the surface of the iron electrode.

关 键 词：阳极极化 SDS DTAB CTAB TWEEN-80 钝化 缓蚀剂 

分 类 号：TQ423.2[化学工程]