Results 241 to 250 of about 2,501,691 (305)

Electrochemical noise at passive iron

Electrochimica Acta, 1988
Abstract With the apparatus described it was possible to measure under potentiostatic conditions at frequencies up to about 1 kHz spectral densities of current noise comparable to the thermal noise at resistances of the order M Ohm. The spectral densities of the current noise at passive iron microelectrodes in neutral borate or acetate buffer ...
K. Nachstedt, K.E. Heusler
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Evaluation of Corrosion Inhibitors by Electrochemical Noise Analysis

Journal of The Electrochemical Society, 1992
The corrosion potential fluctuations of aluminum alloy AA 6351 electrodes in 0.5M chloride solutions were recorded both in the absence and in the presence of the following inhibitors: 2-mercaptopyrimidine, sodium molybdate, and sodium nitrate. The corresponding spectral density plots, calculated over a wide frequency range, are discussed in order to ...
MONTICELLI, Cecilia, BRUNORO, Giancarlo, FRIGNANI, Alessandro, TRABANELLI, Giordano   +3 more
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On the determination of electrochemical noise resistance

Metals and Materials International, 2009
The effects of sampling duration and sampling frequency on noise resistance were investigated for Type 316 stainless steel in accordance with a standard procedure employed in polarization resistance measurements. Noise resistance was also determined by wavelet transform and compared with that from AC impedance measurements. An optimum sampling duration
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A crevice corrosion study by Electrochemical Noise Analysis

Materials and Corrosion, 2000
The use of the Electrochemical Noise Analysis (ENA) for the evaluation of crevice corrosion is illustrated in the case of AISI 430 stainless steel in 3% sodium chloride. A crevice former was used in order to induce a crevice corrosion attack. Current and potential noise signals were simultaneously recorded allowing the determination of the noise ...
GUSMANO, GUALTIERO, Marchioni F., MONTESPERELLI, GIAMPIERO   +2 more
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Electrochemical Noise - the Third Octave

CORROSION 2005, 2005
Abstract Electrochemical noise has been used as a corrosion monitoring tool for almost twenty-four years. During this time, the technique has received a high level of interest in both laboratory and field applications. Various analytical approaches in both the time and frequency domains have been developed for data evaluation.
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THE USE OF ELECTROCHEMICAL NOISE ANALYSIS ON CORRODING SYSTEMS

Fluctuation and Noise Letters, 2004
This paper gives an overview of the use of Electrochemical Noise (EN) for corrosion studying and monitoring. Since the quality and reliability of noise data are affected by a number of acquisition parameters, such as sampling interval, sampling duration, D.C. trend and instrumental noise, some experimental and practical aspects were discussed. The use
MONTESPERELLI, GIAMPIERO, GUSMANO, GUALTIERO   +1 more
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Electrochemical noise signals evaluation to classify the type of corrosion using Synchrosqueezing transform

Journal of Electroanalytical Chemistry, 2019
In this research, the corrosion type evaluation on the 6061-T6 aluminum alloy exposed to three different solutions using the Electrochemical Noise (EN) technique evaluated by the Synchrosqueezing Transform (SST), and the Shannon energy (SSE) methods is ...
J. H. Arellano-Pérez, R. Escobar-Jiménez, D. Granados-Lieberman, J. F. Gómez‐Aguilar, J. Uruchurtu-Chavarín, V. Alvarado-Martínez   +5 more
semanticscholar   +1 more source

Pattern formation in noise-reduced electrochemical deposition

Physical Review E, 1993
Noise-reduced electrodeposition is performed in an agarose gel medium containing ${\mathrm{CuSO}}_{4}$ solution. Instead of random fractal-like patterns usually seen in ${\mathrm{CuSO}}_{4}$ aqueous solution electrodeposition, the deposit shows a more ordered morphology. The dendritic pattern with an evident main stem can be seen.
, Wang, , Ming, , Bennema
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Validation of Electrochemical Noise Measurements

CORROSION 2012, 2012
Abstract Electrochemical noise measurement is established as a means of estimation of corrosion rate, and methods for the identification of localized corrosion have been proposed. Many of these methods make the assumption that two electrodes used to measure current noise have similar behavior; this paper examines tests based on measured ...
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Empirical study of noise dependence in electrochemical sensors

5th IEEE International Workshop on Advances in Sensors and Interfaces IWASI, 2013
We report the experimental study of noise in electrochemical biosensors as related to voltage and concentration. A comparison with experiments is performed for H2O2 and Ferrocyanide with bare sensors, and with sensors functionalized with Multi-Walled Carbon Nanotubes (MWCNT) modified electrodes. Chronoamperometry measurements at different voltages were
Sara S. Ghoreishizadeh, Gaurav Nanda, Sandro Carrara, Giovanni De Micheli   +3 more
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