A New Information Method to Determinate Corrosion Types from Electrochemical Noise  

作　　者：Jian Li Huan-Jun Zheng Ye Zheng Wei-Kang Kong Ke Wang 

机构地区：[1]State Key Laboratory of Precision Measuring Technology and Instrument,Tianjin University [2]School of Materials Science and Engineering,Tianjin University

出　　处：《Acta Metallurgica Sinica(English Letters)》2015年第4期449-453,共5页金属学报（英文版）

基　　金：financially supported by the National Basic Research Program of China (No.2011CB610505);National Natural Science Foundation of China (No.61240038)

摘　　要：Electrochemical noise data in the presence of different corrosion types were analyzed. A correlation between the corrosion type of the observed noise and the entropy rate was recognized. A sequence was transformed from each set of original electrochemical noise signal, then the Markov process M and stationary distribution μ were calculated. Finally, entropy rate of each sequence was obtained by the definition. From the entropy rate, it has been observed that local corrosion showed a lower entropy rate, while uniform corrosion showed a higher entropy rate.Electrochemical noise data in the presence of different corrosion types were analyzed. A correlation between the corrosion type of the observed noise and the entropy rate was recognized. A sequence was transformed from each set of original electrochemical noise signal, then the Markov process M and stationary distribution μ were calculated. Finally, entropy rate of each sequence was obtained by the definition. From the entropy rate, it has been observed that local corrosion showed a lower entropy rate, while uniform corrosion showed a higher entropy rate.

关 键 词：Entropy rate Stainless steel CORROSION Electrochemical behavior 

分 类 号：TG172[金属学及工艺—金属表面处理]