Wavelets analysis of electrochemical noise generated during corrosion processes of pure Al in NaCl solution  

作　　者：高云芳 张昭 李劲风 曹发和 程英亮 张鉴清 

机构地区：[1]Department of Chemistry

出　　处：《中国有色金属学会会刊：英文版》2003年第3期613-616,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(G19990 65 0 )supportedbytheNationalKeyFundamentalResearchandDevelopmentProgramofChina,project(50071054)supportedbytheNationalNaturalScienceFoundationofChina;projectsupportedbytheStateKeyLaboratoryforCorrosionandProtection,China

摘　　要：The potential noise during corrosion of pure aluminum in sodium chloride solution was recorded and analyzed with wavelet transform technique. The typical results show that the electrochemical noise (EN) signal is composed of distinct type of events, which can be classified according to their scales, i.e. time constants. And the process underlying the rapid fluctuations of EN, which is characterized by a small scaling value, i.e. high frequency components and which is usually used for local analysis, is not consistant with time; whilst those associated with slower processes or characterized by a large scaling value, which are usually used for global analysis, are continuous.The potential noise during corrosion of pure aluminum in sodium chloridesolution was recorded and analyzed with wavelet transform technique. The typical results show thatthe electrochemical noise (EN) signal is composed of distinct type of events, which can heclassified according to their scales, i. e. time constants. And the process underlying the rapidfluctuations of EN, which is characterized by a small scaling value, i. e. high-frequency componentsand which is usually used for local analysis, is not consistant with time; whilst those associatedwith slower processes or characterized by a large scaling value, which are usually used for globalanalysis, are continuous.

关 键 词：氯化钠溶液 纯铝 腐蚀过程 电化学噪声 小波分析 

分 类 号：TG172[金属学及工艺—金属表面处理]