Novel time–frequency characterization of electrochemical noise data in corrosion studies using Hilbert spectra

Homborg, A.M.; Westing, E.P.M. van; Tinga, Tiedo; Zhang, X.; Oonincx, P.J.; Ferrari, G.; Wit, J.H.W. de; Mol, J.M.C.

doi:10.1016/j.corsci.2012.09.007

Cited by 92 publications

(47 citation statements)

References 63 publications

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“…This would be done by introducing a third area (e.g. C, the original areas being A and B), and then measuring electrochemical noise for AB, BC and AC sets and calculating the individual values of A, B and C. Further developments of field instruments could offer both arrangements (SS, NOCS) 21 as either a single (S) or a multiple measurement (M). Generally though the problem of asymmetric electrodes is inherent in the "normal" ENM method.…”

Section: Asymmetry Of Electrodesmentioning

confidence: 99%

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A critical review of electrochemical noise measurement as a tool for evaluation of organic coatings

Jamali

Mills

2016

Progress in Organic Coatings

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The simplicity of measuring equipment and versatility of data analysis makes electrochemical noise measurement an ideal technique for acquiring electrochemical information about the corrosion behavior of a painted metal relatively quickly. Hence the method has great potential for use in the laboratory as well as in field situations. However, special care must be taken in choosing data acquisition parameters, reference electrodes and symmetry of electrodes in order to achieve reproducible measurements. These areas have been discussed in this review along with methods of data analysis, alternative electrode configurations for on-site measurements and novel applications of the technique. AbstractThe simplicity of measuring equipment and versatility of data analysis makes electrochemical

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Section: Asymmetry Of Electrodesmentioning

confidence: 99%

“…Also statistical models such as shot noise theory [19,20] and mathematical analysis such as Hilbert spectra [21,22] can be implemented to obtain quantitative measures of corrosion mechanism.…”

mentioning

confidence: 99%

A critical review of electrochemical noise measurement as a tool for evaluation of organic coatings

Jamali

Mills

2016

Progress in Organic Coatings

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“…The calculation of (spectral) noise resistance or any parameter derived from the power spectral density assumes a stationary process and thus requires the removal of the DC drift or windowing beforehand [1,[16][17][18][19]. A different way to analyse EN signals is the application of time-frequency techniques [20,21]. The analysis of time-frequency information of EN offers some important advantages over the widely used Fourier transform [22].…”

Section: Introductionmentioning

confidence: 99%

“…In the analysis of EN, irregularities can be regarded as the transients that occur due to the underlying physico-chemical process. Metastable pitting of stainless steel, for example, generates clearly distinguishable irregularities, or transients, in the EN signal [20]. Traditionally Fourier analysis is used to analyze irregular behavior of signals.…”

Section: Introductionmentioning

confidence: 99%

Wavelet Transform Modulus Maxima and Holder Exponents Combined with Transient Detection for the Differentiation of Pitting Corrosion Using Electrochemical Noise

2018

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A potentially powerful tool to detect and classify corrosion mechanisms is the analysis of electrochemical noise (EN). Data analysis in the time-frequency domain using e.g. continuous wavelet transform (CWT) allows the extraction of localized frequency information, providing information on the type of corrosion, i.e. uniform or localized corrosion, from the EN signal. The CWT provides the opportunity to analyse changes in frequency behavior of electrochemical noise signals over time. In the presence of transients generated by pitting corrosion that occur only during short instants of time, this is an important property. This paper introduces the combination of automated transient detection with wavelet transform modulus maxima (WTMM) and the Holder exponent. WTMM enhances the determination of transient frequencies by indicating the ridges of a CWT spectrum. The Holder exponent, a measure of singularity of an EN signal, provides a single parameter discrimination tool based on WTMM and serves to differentiate between general corrosion and two types of pitting corrosion of stainless steel AISI304 exposed to aqueous HCl solutions of different concentrations and as such at different pH values.

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“…The fundamental principles of EMD. EMD is to determine instantaneous equilibrium position using the average value of the time series envelope and then decompose the nonstationary signal to a group of steady IMF [7] . Process a vibration signal X(t) by EMD.…”

Section: Introductionmentioning

confidence: 99%

Vibrating Wire Sensor Signal Denoising and Analysis based on HHT

Deng¹,

Wang²

2016

Proceedings of the 2016 4th International Conference on Sensors, Mechatronics and Automation (ICSMA 2016)

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Abstract. Vibrating wire sensor has advantages of strong anti-interference ability, high sensitivity, easy to long-distance transmission, etc. However, currently only used for static testing technique, in geotechnical engineering and other fields. In order to make the advantages into full play, expand its application field and make it widely used in the areas of port crane, requires further study of dynamic testing technique. Based on research and analysis of static testing technique, the exploratory research of dynamic testing technique is being in popular. This paper creatively puts forward a method for filtering environmental interference and noise and on this basis, constructs an algorithm for dynamic testing, namely the HHT spectrum filtering algorithm based on wavelet threshold pretreatment. The new algorithm provides a viable direction for the vibrating wire sensors used for dynamic testing.

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Novel time–frequency characterization of electrochemical noise data in corrosion studies using Hilbert spectra

Cited by 92 publications

References 63 publications

A critical review of electrochemical noise measurement as a tool for evaluation of organic coatings

A critical review of electrochemical noise measurement as a tool for evaluation of organic coatings

Wavelet Transform Modulus Maxima and Holder Exponents Combined with Transient Detection for the Differentiation of Pitting Corrosion Using Electrochemical Noise

Vibrating Wire Sensor Signal Denoising and Analysis based on HHT

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