Faradaic noise of complex electrochemical reactions

Tyagai, V. A.

doi:10.1016/0013-4686(71)85075-2

Cited by 99 publications

(48 citation statements)

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“…The measurement of electrochemical noise (EN) for corrosion studies was first described by Iverson in 1968 [1]. At the same time Tyagai examined EN [2] [3]. First studies on EN were carried out using only one working electrode, and consequently this will not allow the measurement of corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

Comparative Electrochemical Noise Study of the Corrosion of Different Alloys Exposed to Chloride Media

Nagiub¹

2014

ENG

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This paper describes the corrosion behavior of aluminum, copper, and mild steel when exposed to chloride media using both electrochemical noise analysis (ENA) and electrochemical impedance spectroscopy (EIS). Analysis of electrochemical noise (EN) data demonstrated the need for removal of drifts in both potential and current fluctuations. Statistical analysis such as noise resistance, localization index, skewness and kurtosis has been evaluated. Noise resistance showed a good agreement with polarization resistance. Fast Fourier transformation (FFT) has been applied to convert EN data from the time domain to the frequency domain. Spectral noise plots showed a good agreement with impedance spectra for the different alloys determined at the same exposure time. Spectral and statistical analysis can extract useful information from EN data.

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Section: Introductionmentioning

confidence: 99%

Comparative Electrochemical Noise Study of the Corrosion of Different Alloys Exposed to Chloride Media

Nagiub¹

2014

ENG

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“…17 Here, p is the probability that a channel is open. Accordingly, S H (0) is [20] p is found to be k 1 /(k 1 ϩ k 2 ) by solving Eq. 4 for the steady-state porosity.…”

Section: Mathematical Modelmentioning

confidence: 99%

Electrochemical Current Noise on Aluminum Microelectrodes

Isaac

Hebert

1999

J. Electrochem. Soc.

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Aluminum disk microelectrodes were used to investigate electrochemical current noise in pH 8.8 borate buffer. The current noise spectra, expressed in terms of the current spectral density, had a characteristic two‐plateau structure in the experimental bandwidth of 0.05–50 Hz, were potential‐independent, and increased proportionally to electrode area. Injection of NaCl solution near the electrode surface, at potentials below that of the onset of pitting corrosion, caused 0.1–1 Hz current fluctuations to appear. From the frequency and area dependence of the current spectral density in the chloride‐free solution, it was concluded that the noise arose from a number of discrete, approximately evenly distributed voltage noise sources positioned electrically in series with the inner barrier layer of the oxide film. A mathematical model for the current noise was developed which described a physical mechanism for noise production based on fluctuations in the widths of cracks or pores in the outer part of the surface film. The model was consistent with the observed area and frequency dependence of the current spectral density, suggesting that the physical process it described is a possible mechanism of noise generation. It could not be determined whether the noise sources were isolated defects or flaws, or pores in an outer precipitated portion of the oxide film. © 1999 The Electrochemical Society. All rights reserved.

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“…Noise measurements have been widely used not only in the 1960s in relation to communication systems [7] and semiconductors [8] but also from time to time in electrochemical studies [9][10][11][12]. Electrochemical noise can be caused by different phenomena such as turbulent mass transfer [13][14][15][16][17], gas evolution [18][19][20], electrode corrosion [21][22][23][24] and passivation [25], or water transfer in fuel cells [26].…”

Section: Introductionmentioning

confidence: 99%

New methodology of electrochemical noise analysis and applications for commercial Li-ion batteries

Martemianov

Adiutantov

Evdokimov³

et al. 2015

J Solid State Electrochem

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Electrochemical noise analysis (ENA) is performed on ICR 18650 commercial lithium-ion batteries. The interest of ENA relates with the possibility of in-situ diagnostics during charging or discharging of the battery. Thus, the extraction of small voltage fluctuations should take into account the time evolution of the mean signal. The non-stationary character of the phenomenon (charging and discharging battery) limits the use of traditional methods of signal filtering and attenuation, so a special methodology has been developed to calculate the noise standard deviation (STD). A good reproducibility of the results has been demonstrated, and V-shape form curves have been obtained with a minimum STD value at about 55 % of state of charge (SOC). It can be noted also that fast discharge provided with 3.3 Ω load is noisier than the slow one with 5 Ω load. Some promising results have been obtained regarding the possibility of battery state of health determination.

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Faradaic noise of complex electrochemical reactions

Cited by 99 publications

References 1 publication

Comparative Electrochemical Noise Study of the Corrosion of Different Alloys Exposed to Chloride Media

Comparative Electrochemical Noise Study of the Corrosion of Different Alloys Exposed to Chloride Media

Electrochemical Current Noise on Aluminum Microelectrodes

New methodology of electrochemical noise analysis and applications for commercial Li-ion batteries

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