H_2O_2对钢表面稀土转化膜成膜的影响  

Effect of H_2O_2 on rare earth conversion on steel surface

作　　者：王永光[1] 吕坤[1] 薛丽华[1] 张学颖[1] 李文学[1] 张建旗[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2010年第2期132-135,共4页Journal of Inner Mongolia University of Science and Technology

摘　　要：应用交流阻抗技术(EIS)研究了H2O2浓度对特种钢表面稀土Ce转化膜成膜过程的影响、扫描电子显微镜(SEM)与能量散射能谱(EDS)分析膜表面形貌与成分.结果表明,EIS显示了在不同H2O2浓度转化液中成膜的动态过程,当H2O2的浓度相对0.012 M的Ce(NO3)3.6H2O达到一个优化浓度时(本实验为0.012 M)形成膜速度最快且最终膜的稳定阻抗值最大,达到2.1×105Ω.cm2;SEM显示在该溶液浓度下表面所形成的转化膜均匀致密,其成分主要由Ce、O、Fe元素组成.The effect of H2O2 concentration on rare earth conversion coating forming was studied using electrochemical impedance spectroscopy（EIS）.The surface morphology and composition of protective films were analyzed by SEM and EDS,respectively.The result indicates that the impedance of the Ce conversion protective films attains to maximum conversion at a fast speed when an optimal concentration of H2O2（in this case,0.012 M） reacts in the solution with Ce（NO3） 3·6H2O of 0.012 M,and a uniform and compact conversion coating was observed from SEM.The conversion coating is mainly composed of element Ce,Fe and O.

关 键 词：H2O2 稀土转化膜 成膜过程 

分 类 号：TG174[金属学及工艺—金属表面处理]