Measuring atmospheric corrosion with electrochemical noise: A review of contemporary methods

Ma, Chao; Wang, Zeqing; Behnamian, Yashar; Gao, Zhiming; Wu, Zhong; Qin, Zhenbo; Xia, Da-Hai

doi:10.1016/j.measurement.2019.02.027

Cited by 54 publications

(24 citation statements)

References 89 publications

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“…As the small electrode does not have the required space for reduction, the electrons caused by the anodic reaction move toward the larger electrode and the cathodic reduction reaction occurs on it. [ 39 ] As a result, the unidirectional ECN signals on asymmetrical electrodes are recorded. In the case of bidirectional signals, such as those emerged from symmetrical cells, the skewness approaches zero (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the localized corrosion on Mg electrode surface by electrochemical noise technique

Naghizade

Hosseini

Shahidi

et al. 2020

Materials & Corrosion

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The symmetrical and asymmetrical electrodes made of Mg were studied in 0.1-M NaCl electrolyte adjusted at pH 12. The statistical and wavelet methods were employed for analyzing the electrochemical current noise (ECN) signals. The asymmetric configuration was used for electrochemical detection of filiform corrosion on Mg electrode. The real time scale of the dominant transients of the asymmetric electrodes was detected on the basis of the maximum peak in the SDPS plots. The SDPS values of the real time scale crystals of the ECN signals resulting from asymmetrical electrodes increased with the increase in immersion time due to the onset of filiform corrosion.

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Section: Resultsmentioning

confidence: 99%

Evaluation of the localized corrosion on Mg electrode surface by electrochemical noise technique

Naghizade

Hosseini

Shahidi

et al. 2020

Materials & Corrosion

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“…Some research [25][26][27][28][29][30]36,37,[53][54][55][56][57][58] indicates that Several EN procedures correlating time-dependent fluctuation of current and potential during the corrosion process have been used to indicate the type of corrosion occurring. For instance, it is well recognized that the primary source of electrochemical noise is the passive film breakdown process and repassivation process.…”

Section: Discussionmentioning

confidence: 99%

“…The statistical analysis includes parameters such as noise resistance (R n ), skewness, kurtosis, localization index (LI), chaos analysis, recurrence quantification analysis, and fractal analysis. The fast Fourier transform includes power spectral density, noise impedance, etc., and the time-frequency domains methods include the analysis of Hilbert-Huang transform, discrete wavelet transform, Stockwell transform, and others [26][27][28][29][30][31][32]. LI, skewness, and kurtosis values have been reported as values related to different corrosion types and values referring to the asymmetry of EN data's distribution and shape [32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Frequency Analysis of Transients in Electrochemical Noise of Superalloys Waspaloy and Ultimet

Jáquez-Muñoz

Gaona‐Tiburcio

Miramontes

et al. 2021

Metals

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Nickel or Cobalt-based superalloys represent an important class of engineering materials, finding widespread application in critical components within the gas turbine engines used for jet propulsion and electricity generation. This research aimed at the frequency analysis of transients in electrochemical noise of Waspaloy and Ultimet superalloys, immersed in 3.5 wt.% in H2SO4 and NaCl solutions at two different temperatures, 25 and 60 °C. Localized corrosion behavior of superalloys was assessed using the electrochemical noise technique (EN) according to ASTM-G199 standard. Three different statistical methods filtered the EN signal, and the polynomial method was employed to obtain the noise resistance (Rn), the localization index (LI), skew and kurtosis, and the power spectral density analysis (PSD). Results indicate that the current and potential noise transients have a better behavior with better clarity when a polynomial is used to show a localized corrosion kurtosis for both superalloys.

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“…4d). The observed changes are the result of atmospheric corrosion, the mechanism of which is the interaction of a thin layer of salt and other components dissolved in water on the metal surface [40]. In order to check the influence of the condition of the wire after storage on the quality of the weld metal, welding process was carried out.…”

Section: Methodsmentioning

confidence: 99%

Effect of Storage Conditions of Rutile Flux Cored Welding Wires on Properties of Welds

Świerczyńska

2019

Advances in Materials Science

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The influence of storage locations of two grades of rutile flux cored welding wires on their surface condition and the strength of the welds made with them were studied. Wires were stored in real urban conditions (Gdańsk and Katowice) for 1 month, simultaneously recording changes in conditions: temperature and relative humidity of the environment. Visual tests of wires in the delivered and stored condition as well as visual and tensile strength tests of welds made with them were carried out. It was found that the surface of the wires underwent more intense degradation (atmospheric corrosion) during storage in Katowice than in Gdańsk. Significant difference in tensile strength was observed only for padding welds made using Gdańsk stored wires. The lowest recorded tensile strength value was not lower than the standard requirements for the wires.

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Measuring atmospheric corrosion with electrochemical noise: A review of contemporary methods

Cited by 54 publications

References 89 publications

Evaluation of the localized corrosion on Mg electrode surface by electrochemical noise technique

Evaluation of the localized corrosion on Mg electrode surface by electrochemical noise technique

Frequency Analysis of Transients in Electrochemical Noise of Superalloys Waspaloy and Ultimet

Effect of Storage Conditions of Rutile Flux Cored Welding Wires on Properties of Welds

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