Electrochemical Noise Measurements for Corrosion Studies

摘要

This paper examines the various techniques that may be used to analyse electrochemical noise data, and explores the theoretical basis of the more important methods.Methods considered include:1. Time domain analysis methods - including the direct measurement of the properties of transients from the time record.2. Statistical methods - including the measurement of the mean, standard deviation/variance, noise resistance, coefficient of variation, localisation parameter and other statistical parameters.3. Frequency domain analysis methods - including spectral estimation using various methods, including MEM and FFT, the determination of noise impedance, the determination of bispectra and wavelet analysis.4. Discriminant analysis - this is a general method for determining the ability of a particular measurement to discriminate between alternative behaviours, and its application to electrochemical noise analysis is indicated.