Surface and corrosion properties of AA6063-T5 aluminum alloy in molybdate-containing sodium chloride solutions

Kharitonov, D. S.; Dobryden, Illia; Sefer, Birhan; Ryl, Jacek; Wrzesińska, Angelika; Makarova, Irina; Bobowska, Izabela; Курило, И. И.; Claesson, Per M.

doi:10.1016/j.corsci.2020.108658

Cited by 60 publications

(23 citation statements)

References 52 publications

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“…The instantaneous corrosion rate of substrates could be measured using Tafel curves, and in this way, it is possible to derive the parameters [28]. The linear E (potential/V) versus lg (I ) (I is current/A) as Tafel curves are shown in Figure 8a, b [29][30][31]. Corrosion potential values were determined by fitting the Tafel data (Table 2).…”

Section: Tafel Results Of the Experimental Samplesmentioning

confidence: 99%

Hydrogen evolution and electromigration in the corrosion of aluminium metal sheath inside high‐voltage cables

et al. 2021

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The urgent need for power transmission is the reason for leading research on the safer operation of high-voltage cables. These high-voltage cables are emerging as an efficient technology for underground power transmission. However, the electrochemical corrosion of aluminium (Al) metal sheaths in these cables is a common and challenging degradation process. Herein, the corrosion mechanisms and electrochemical analysis are investigated by using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS) and laboratory-designed electrochemical characterisation techniques. In the corrosion experiments, the authors evaluated the corrosion rate by measuring the release rate of hydrogen gas and explored the different roles of sodium polyacrylate (NaPA) during the corrosion process. It is found that the complexation reactions between NaPA and Al inhibited corrosion while increased the resistance of the buffer layer. The proposed mechanisms of corrosion in this study can improve the lifespan and sustainability of high-voltage power transmission.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Tafel Results Of the Experimental Samplesmentioning

confidence: 99%

Hydrogen evolution and electromigration in the corrosion of aluminium metal sheath inside high‐voltage cables

et al. 2021

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“…The values of the corrosion current densities (I corr ), the corrosion potentials (E corr ), the anodic Tafel slopes (β a ), the cathodic Tafel slopes (β c ) and the percentage of inhibition efficiencies (IE [I] %) obtained for the PPySMF‐1 and PPySMF‐5 NCs are given in Table 3. The data indicates that when increasing the concentration of the PPy–SMF NCs the corrosion potential (E corr ) was shifted to a more positive direction and reduces both the anodic and cathodic current densities 61,62,63 . Also, I corr values decrease with an increase in the concentration of PPy–SMF NCs.…”

Section: Resultsmentioning

confidence: 93%

“…The data indicates that when increasing the concentration of the PPy-SMF NCs the corrosion potential (E corr ) was shifted to a more positive direction and reduces both the anodic and cathodic current densities. 61,62,63 Also, I corr values decrease with an increase in the concentration of PPy-SMF NCs. Hence, the IE (I) of PPy-SMF NCs depends on its concentration.…”

Section: F I G U R Ementioning

confidence: 93%

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

Packiaraj

Kumar

2020

J of Applied Polymer Sci

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In this work, new water-soluble polypyrrole-sulfonated melamine formaldehyde nanocomposites (PPy-SMF NCs) were first synthesized by one-step insitu polymerization of pyrrole with FeCl 3 in the presence of various mole ratios of sulfonated melamine formaldehyde (SMF). The characterization of the PPy-SMF NCs was investigated via ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray, dynamic light scattering, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, and conductivity measurements. The resulting PPy-SMF NCs were proved to improve the solubility, electrical properties, and thermal stability. The anticorrosion performance of PPy-SMF NCs on 316 L stainless steel (316 L SS) was examined using electrochemical impedance spectroscopy, potentiodynamic polarization, and weight-loss method. The result showed that the PPy-SMF NCs acts as a mixed-type inhibitor, as well as a protective layer to 316 L SS against corrosion in 3.5% NaCl solution. The Langmuir adsorption isotherm was well fitted and suitable to explain the adsorption behavior of the PPy-SMF NCs on 316 L SS surface. The inhibition efficiency of PPy-SMF NCs is 99% by the weight-loss method which could be attributed to the protective layer formed on 316 L SS surface by the adsorption of PPy-SMF NCs.

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“…The corrosion reaction is conditioned by the maintenance of overall electrical neutrality. Electrons are released by the oxidation of iron in the anodic region and move through the metal structure to the cathodic region adjacent to the surface, where they react with oxygen and water to form hydroxyl ions according to the Reactions (2) and (3). Therefore, the movement of electrons in the metal and cations in the electrolyte to the anode surfaces must be counterbalanced by one or more reduction reactions (electron consumption), depending on the electrolyte pH, on the cathode surface side.…”

Section: Introductionmentioning

confidence: 99%

“…To limit the deleterious corrosion effect on metallic material properties, different protective approaches were developed, such as cathodic or anodic polarization, passive or active coating [3], etc. Among these approaches, the use of inhibitor layers as passive coatings is the most popular.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosion Efficiency of Inhibitor Coatings Based on Ammonium Cation with Different Substituents: The Influence of Wettability and Molecular Structure

et al. 2021

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In this work, different cationic surfactants with various aliphatic and aromatic ammonium cations were used to prepare inhibitor coatings and were characterized by different techniques such as IR spectroscopy and NMR. The inhibitor coatings were prepared by electrografting on the steel surface and their anticorrosion properties were evaluated in different media (HCl, H2SO4 and NaCl solutions). The electrochemical potentiodynamic polarization technique was used to study the inhibition efficiency of the prepared coatings. The dependence of the wetting properties of the electrografted layer and its homogeneity on the molecular structure of the prepared surfactants was studied. Particular attention was paid to the relationship between the properties of these surfactants in terms of critical micellar concentration, packing and wetting, and the anti-corrosion efficiency of their coatings. In this paper, we discuss the synergistic inhibition effect and the anticorrosion efficiency.

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Surface and corrosion properties of AA6063-T5 aluminum alloy in molybdate-containing sodium chloride solutions

Cited by 60 publications

References 52 publications

Hydrogen evolution and electromigration in the corrosion of aluminium metal sheath inside high‐voltage cables

Hydrogen evolution and electromigration in the corrosion of aluminium metal sheath inside high‐voltage cables

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

Anticorrosion Efficiency of Inhibitor Coatings Based on Ammonium Cation with Different Substituents: The Influence of Wettability and Molecular Structure

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