Comparison of Corrosion Resistance of the AA2524-T3 and the AA2024-T3

Queiroz, Fernanda Martins; Terada, Maysa; Bugarin, Aline F.S.; Melo, Hercílio Gomes de; Costa, Isolda

doi:10.3390/met11060980

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…The diameter of the semicircles was found to increase with increase in concentration of the inhibitors. This signifies that corrosive process was inhibited possibly by charge transfer of the inhibitor molecule onto the metal surface and is in agreement with results reported by some researchers [21,22,23]. Tables 3 and 4 show values of the EIS parameters.…”

Section: Electrochemical Impedance Spectroscopy Studiessupporting

confidence: 90%

Electrochemical Investigation of the Anti-corrosive Effect of Spondias mombin Leaves Extract on the Corrosion of Aluminium Alloy (AA2024) and Mild Steel in 0.5 M NaCl

Ogwo

Nnanna

Onyeije

et al. 2023

CSIJ

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The inhibiting effect of Spondias mombin (SM) leaves extract on the corrosion of AA2024 and mild steel in 0.5 M NaCl environment was investigated using electrochemical techniques. Tafel plots obtained from the potentiodynamic polarization (PDP) experiments indicate that for both metals, the curves shifted toward more negative values of the corrosion current density (Icorr) as the inhibitor concentration increased. More so, for all concentrations of the inhibitor, the values of maximum displacement shift in corrosion potential (Ecorr) were found to be less than 85 mV. This shows that SM behaves like a mixed-type corrosion inhibitor. The electrochemical impedance spectroscopy (EIS) study shows that for both metals, the charge transfer resistance (Rct) values increased with an increase in concentration of the inhibitor. The increase in values of Rct can be attributed to the formation of protective film at the metal-solution interface. The Nyquist plots show semi circles whose diameter increased as the inhibitor concentration is increased and this is suggestive of retardation in corrosion process. The inhibition efficiency values obtained in the EIS experiment were found to be in close conformity with those of the PDP experiment.

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Section: Electrochemical Impedance Spectroscopy Studiessupporting

confidence: 90%

Electrochemical Investigation of the Anti-corrosive Effect of Spondias mombin Leaves Extract on the Corrosion of Aluminium Alloy (AA2024) and Mild Steel in 0.5 M NaCl

Ogwo

Nnanna

Onyeije

et al. 2023

CSIJ

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“…This is attributed to the fact that the Ag element provides hardening solid solutions and increases the precipitation kinetics of the T1 phase (Al 2 CuLi). It also helps to achieve a better distribution of said phase [41][42][43][44][45]. Zhou et al [46] and Bai et al [47] promoted the formation of Ω phases (Al 2 Cu) in Al-Cu-Mg alloys.…”

Section: Vickers Microhardness Measurementsmentioning

confidence: 99%

Effect of Heat Treatment on the Electrochemical Behavior of AA2055 and AA2024 Alloys for Aeronautical Applications

Cerezo

Gaona-Tiburcio

Miramontes

et al. 2023

Metals

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Since their development, third-generation aluminum–lithium alloys have been used in aeronautical and other applications due to their good properties, replacing conventional Al-Cu and Al-Zn alloys and resulting in an increase in payload and fuel efficiency. The aim of this work was to investigate the influence of different heat treatments on the electrochemical corrosion behavior of the alloys AA2055 and AA2024 in the presence of three different electrolytes at room temperature, using an electrochemical noise (EN) technique in accordance with the ASTM-G199 standard. In the time domain, the polynomial method was employed to obtain the noise resistance (Rn), the localization index (IL), skewness, and kurtosis, and in the frequency domain, employing power spectral density analysis (PSD). The microstructure and mechanical properties of the alloys were characterized using scanning electron microscopy (SEM) and the Vickers microhardness test (HV). The results demonstrated better mechanical properties of the AA2055 alloy, which had a Vickers hardness of 77, 174, and 199 in the heat treatments T0, T6, and T8, respectively. An electrochemical noise resistance (Rn) of 2.72 × 105 Ω·cm2 was obtained in the AA2055 T8 alloy evaluated in a NaCl solution, while the lowest Rn resistance of 2.87 × 101 Ω·cm2 occurred in the AA2024 T8 alloy, which was evaluated in a HCl solution. The highest electrochemical noise resistance (Rn) was obtained in the AA2055 alloys, which had received the T6 and T8 heat treatments in the three solutions.

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“…Queiroz et al [2] compared the corrosion resistance of the AA2024-T3 and AA2524 T3 aeronautic Al alloys, giving emphasis to the interplay between microstructural aspects (presence of intermetallic compounds) and the electrochemical behavior of the alloys. The surface area of intermetallic compounds was associated with the localized corrosion susceptibility of the alloys.…”

Section: Contributionsmentioning

confidence: 99%