Performance Study of Aluminium–Zinc Anode using Noise Resistance, Pitting Index and Recurrence Plots from Electrochemical Noise Data

Idusuyi, N.; Fayomi, O. S. I.

doi:10.1007/s40735-021-00493-9

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…Up to date it is not agreed upon if it is possible to gather reliable data by its evaluation. [ 13,24,25 ]…”

Section: Resultsmentioning

confidence: 99%

“…Up to date it is not agreed upon if it is possible to gather reliable data by its evaluation. [13,24,25] It was further proposed that the Skewness and Kurtosis values of the time-domain data can be used to identify the predominant corrosion mechanism. [4] Skewness and Kurtosis represent the third and fourth statistical moment and are calculated according to Equation ( 3) and ( 4), respectively, where x i represents each individual data point of the current or the potential measurements and x ¯the respective mean value.…”

Section: Statistical Analysis Of the Ecn Time-domain Datamentioning

confidence: 99%

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Electrochemical Noise Measurements on Titanium Regarding Implant Applications

Greul

Kleber

See

et al. 2023

Physica Status Solidi (a)

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The suitability of electrochemical noise measurements to gather information on the corrosion behavior of titanium implants is explored. Rod‐shaped titanium samples have been immersed in different types of electrolytes, and the generated electrochemical noise is evaluated. The electrolytes include simulated body fluids, namely phosphate‐buffered saline and artificial saliva. Different data evaluation methods have been explored. The evaluation of the time‐domain data and further statistical methods shows promising results. Noise resistance values ranging from 0.09 MΩ for 3.5 wt% H2SO4 solution up to 0.45 MΩ for simulated body fluids have been recorded. It is possible to determine the dominating corrosion modes on the sample surface and reach results in alignment with expectations and established knowledge on corrosion mechanisms.

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“…Up to date it is not agreed upon if it is possible to gather reliable data by its evaluation. [ 13,24,25 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Statistical Analysis Of the Ecn Time-domain Datamentioning

confidence: 99%

Electrochemical Noise Measurements on Titanium Regarding Implant Applications

Greul

Kleber

See

et al. 2023

Physica Status Solidi (a)

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“…Incorporating tartaric acid into the sulfuric acid anodizing (TSA) process has garnered notable attention in surface treatment. Extensive works in the literature highlight its efficacy in enhancing corrosion resistance for the AA2024 and AA7075 alloys [12][13][14][15][16][17][18][19]. Similarly, the combination of phosphoric and sulfuric acids in the anodizing process has also been explored [20].…”

Section: Introductionmentioning

confidence: 99%

“…The discerning choice to assess the anodizing efficacy concerning corrosion resistance and to find the underlying corrosion mechanisms was best encapsulated within an electrochemical noise analysis. This technique focuses on collecting and analyzing the fluctuating currents and voltages that ebb and flow upon the surface of a designated sample [14,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Noise Analysis Using Experimental Chaos Theory, Power Spectral Density and Hilbert–Huang Transform in Anodized Aluminum Alloys in Tartaric–Phosphoric–Sulfuric Acid Solutions

Martínez-Ramos,

Olguin-Coca,

Lopez-Leon

et al. 2023

Metals

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Aluminum and its alloys find widespread applications across diverse industries such as the automotive, construction, and aeronautics industries. When these alloys come into contact with ambient air, an Al2O3 thin oxide layer is naturally formed, typically measuring 2 to 4 nm and exhibiting remarkable hardness and protective qualities, rendering the alloys corrosion-resistant in specific atmospheric and chemical environments. This study aimed to characterize the electrochemical behaviors of anodized AA2024 and AA7075 alloys within a complex three-component electrolyte composed of tartaric–phosphoric–sulfuric acid (TPSA) solutions. The anodized specimens were subsequently exposed to 3.5 wt.% NaCl solution at room temperature, and their electrochemical performances were meticulously evaluated using an electrochemical noise (EN) analysis in accordance with ASTM G-199, respectively. In the EN, three methods of data analysis were used: the time domain analysis (chaos analysis: application of Lyapunov exponent and dimension correlation), the frequency domain analysis (power spectral density, PSD), and the time–frequency domains analysis (Hilbert–Huang transform, HHT). Scanning electron microscopy (SEM) was used to observe the morphologies of the anodized surfaces. The results indicated that the AA2024-0, AA2024-1, and AA2024-2 alloys and the AA7075-2 and AA7075-3 samples exhibited mixed corrosion according to the Lyapunov constant, with a notable inclination towards localized corrosion when analyzed using the PSD and HHT methods. The surface was not homogenous, and the corrosion process was predominately localized in specific zones.

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Study of the anticorrosive behavior of samarium as a corrosion inhibitor in multilayer systems for aluminum alloy

Mendez

Rojas

Bueno

et al. 2023

Sci Rep

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This study shows a multilayer system based on samarium compounds as a corrosion inhibitor and a continuous SiO2 layer by atmospheric pressure plasma jet (APPJ) as a protective barrier for aluminim alloy AA3003. One of the main advantages of this new coating is that it does not require vacuum chambers, which makes it easy to incorporate into production lines for automotive and aeronautical components, etc. The deposit of samarium corrosion inhibitor was carried out by two methods for comparison, the immersion method and a novel method to deposit corrosion inhibitor by APPJ. The multilayer system generated was homogeneous, continuous, adherent, and dense. The electrochemical behavior shows that the samarium compound was completely oxidized on coatings by the immersion method and favors corrosion. The APPJ deposition method shows a protective behavior against corrosion by both samarium compounds and silica depositions. XPS analyses show that the amount of Sm(OH)3 increases by the APPJ method compared with the immersion method since the spectrum of O1s is mainly controlled by OH. It was determined that the best processing times for the electrochemical study of the multilayer system were 40 min for the immersion method and 30 s for the APPJ method for the layer of corrosion inhibitor. In the case of the SiO2 barrier layer by APPJ, the best time was 60 s of exposure to the plasma jet and this coating could reduce the corrosion of AA3003 by 31.42%.

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Performance Study of Aluminium–Zinc Anode using Noise Resistance, Pitting Index and Recurrence Plots from Electrochemical Noise Data

Cited by 3 publications

References 28 publications

Electrochemical Noise Measurements on Titanium Regarding Implant Applications

Electrochemical Noise Measurements on Titanium Regarding Implant Applications

Electrochemical Noise Analysis Using Experimental Chaos Theory, Power Spectral Density and Hilbert–Huang Transform in Anodized Aluminum Alloys in Tartaric–Phosphoric–Sulfuric Acid Solutions

Study of the anticorrosive behavior of samarium as a corrosion inhibitor in multilayer systems for aluminum alloy

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