Impact of rare earth compounds on corrosion of aluminum alloy (AA6061) in the marine water environment

Deyab, M.A.; El‐Rehim, Sayed S. Abd; Hassan, Hamdy H.; Shaltot, Amr M.

doi:10.1016/j.jallcom.2019.153428

Cited by 52 publications

(15 citation statements)

References 41 publications

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“…This inhibitor forms low‐soluble cerium oxide/hydroxide on the cathodic IMCs in aluminum alloys, thus slowing the corrosion process. [ 22–25 ]…”

Section: Introductionmentioning

confidence: 99%

“…This inhibitor forms low-soluble cerium oxide/hydroxide on the cathodic IMCs in aluminum alloys, thus slowing the corrosion process. [22][23][24][25] Also, the various cerium salts were tested, and it was found that Ce acetate has the best protective ability on the 7xxx series aluminum alloy. [24] Other cerium salts were also tested, such as citrates, [26] phosphates, [27] sulfates, [24,28,29] perchlorates, [24] and nitrates.…”

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confidence: 99%

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Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Radojković

Marunkić

Milošević

et al. 2022

Materials & Corrosion

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Green corrosion inhibitors, Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate, were tested in NaCl solution with the aim to evaluate their inhibitory effect on 7049 aluminum alloy and to propose a mechanism of their inhibitive action. Corrosion properties of the formed inhibitor layer were analyzed using electrochemical impedance spectroscopy, while the pit formation resistance was analyzed using potentiodynamic polarization tests. Morphology of the formed pits was evaluated by scanning electron microscope/energy‐dispersive spectroscopy analysis. It was shown that Ce(III) propionate in NaCl solution has a noticeably higher protective ability than Ce(III) chloride and Ce(III) nitrate. The presence of cerium, propionate anions, and Al–O bonds in the inhibitive layer on the 7049 aluminum alloy surface was confirmed by X‐ray photoelectron spectroscopy analysis. This indicates the formation of Ce propionate complexes and bonds via oxygen atoms from carboxylate anions with the metal surface. Density‐functional theory methods were used for the geometry optimization of possible Ce propionate complexes as corrosion inhibitors.

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“…This inhibitor forms low‐soluble cerium oxide/hydroxide on the cathodic IMCs in aluminum alloys, thus slowing the corrosion process. [ 22–25 ]…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Radojković

Marunkić

Milošević

et al. 2022

Materials & Corrosion

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“…Hinton et al found that the rare earth salts, such as CeCl 3 , LaCl 3 and YCl 3 , exhibit very good corrosion inhibitory effect on AA7075 aluminum alloy [5,6]. Among of them, cerium salts are considered to be one of the most effective inhibitors [7][8][9]. The corrosion rate of the Al alloy is decreased because of a cerium oxide/hydroxides film being formed, inhibiting the cathodic oxygen reduction reaction [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cerium Tartrate on the Corrosion Resistance of Epoxy Coating on Aluminum Alloy and Its Mechanism

et al. 2022

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The inhibition effect and mechanism of cerium tartrate (CeTar) as a pigment in epoxy coating on AA2024-T3 aluminum alloy in 3.5% NaCl solution were studied. Two kinds of coatings were applied on the substrate, including a single-layer epoxy coating with CeTar distributed uniformly and a double-layer coating composed of an inner layer doped with CeTar and an outer layer with no CeTar. The protective performances of the coatings were assessed by a Machu test and an Electrochemical impedance spectroscopy (EIS) technique. The corrosion inhibition mechanism of CeTar in the coating was analyzed with X-ray photoelectron spectroscopy (XPS), inductively coupled plasma mass spectrometry (ICP-MS) and Fourier transform spectroscopy (FTIR). The results show that the addition of CeTar can evidently improve the protective performance of the epoxy coating for a long time (>520 d). This might have relationship with the modification effect on the epoxy coating by cerium salts, and also may be due to the synergistic inhibitory effect by tartrate group and cerium ions on the alloy substrate after their continuous releasing to the coating/alloy interface and forming of a protective film. The double-layer coating provides similar protective properties to the single-layer coating. This suggested that creating a protective film on the aluminum alloy substrate could result in a greater contribution to improving the protection performance of the coating.

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“…However, they have a strong tendency to suffer from local corrosion in an environment containing corrosive anions. [34][35][36] Seawater is a natural corrosive electrolyte, which contains high concentration of sodium chloride. [37] The abundance of chloride ions greatly promotes the corrosion of aluminum alloys resulting in the reduction of the service time of ships.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of a newly developed high strength aluminum alloy with high magnesium content under simulated seawater environment

Liu

Xie

et al. 2022

Materials & Corrosion

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AMg61 (Al-6.2% Mg), a novel form of high-strength, high-magnesium-content aluminum alloy, has been developed for specific maritime engineering in recent years, while its corrosion behavior in seawater is still unknown. Therefore, the corrosion behavior of AMg61 in the simulated seawater was investigated herein, using a weight-loss test and different electrochemical measurements. In addition, corrosion morphology and chemical contents were characterized by metallography, scanning electron microscopy, and energydispersive spectroscopy. The results demonstrated that intergranular corrosion and microcracks developed first in the second phase of AMg61, followed by pitting corrosion. The matrix of AMg61, on the other hand, exhibited a uniform and exfoliation corrosion. The corrosion rate gradually decreased over time.

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Impact of rare earth compounds on corrosion of aluminum alloy (AA6061) in the marine water environment

Cited by 52 publications

References 41 publications

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Effect of Cerium Tartrate on the Corrosion Resistance of Epoxy Coating on Aluminum Alloy and Its Mechanism

Corrosion behavior of a newly developed high strength aluminum alloy with high magnesium content under simulated seawater environment

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