3.4%NaCl介质中铁点蚀行为的表面拉曼光谱成像研究  

Two-dimensional Surface Raman Imaging of a Roughened Iron Electrode in Saline Solution

作　　者：曹佩根[1] 徐浩元[1] 曹文东[1] 郑军伟[1] 顾仁敖[1] 姚建林[2] 谢泳[2] 田中群[2] 

机构地区：[1]苏州大学化学化工系,苏州215006 [2]厦门大学固体表面国家重点实验室,化学系,厦门361005

出　　处：《光谱学与光谱分析》2000年第6期800-802,共3页Spectroscopy and Spectral Analysis

基　　金：江苏省自然科学基金课题资助项目

摘　　要：本文利用共焦拉曼光谱技术结合对铁电极的合适的粗糙化预处理 ,现场研究了 3 4%NaCl腐蚀介质中铁电极的点蚀行为 ,获得了点蚀坑内腐蚀产物的表面增强拉曼光谱 ,成功地将表面增强拉曼光谱技术拓宽至铁的腐蚀行为的研究中。利用共焦拉曼光谱仪的成像技术研究了位于 6 6 0cm-1处点蚀产物的二维分布图。研究表明 :在较正电位铁表面发生点蚀后 ,点蚀坑内腐蚀产物不是以单一物种存在 ,而是多种铁氧化合物共存 ,且这些铁的氧化腐蚀产物的点蚀坑内的分布也极不均匀。By using a confocal microprobe Raman system and proper surface roughening procedure for iron,the pit corrosion behavior of bare iron electrode in 3 4% NaCl (saline solution) solution has been investigated.The surface enhanced Raman scattering (SERS) spectra of the corrosion products due to the pit corrosion at positive potential was obtained with high ratio of signal to noise.The application of SERS technique has been extended successfully to the study of iron corrosion.The two dimensional surface Raman imaging acquired at 660 cm -1 was obtained also with the utility of surface Raman image technique.Results show that different iron oxides should coexist in the pit corrosion region and the distribution of the corrosion products was not uniform.

关 键 词：拉曼光谱成像 铁电极 点蚀 NACL介质 

分 类 号：TG172.6[金属学及工艺—金属表面处理]