Active corrosion protection of various aluminium alloys by lithium‐leaching coatings

Visser, Peter; Terryn, Herman; Mol, J.M.C.

doi:10.1002/sia.6638

Cited by 30 publications

(12 citation statements)

References 31 publications

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“…Recently the effect of inclusion of lithium carbonate as corrosion inhibitor in organic films has been studied to protect aluminum alloys, and the obtained results are very promising. − Visser et al investigated lithium salts as leachable corrosion inhibitors from polyurethane and epoxy-amine coatings and detected the presence of a protective layer in the artificially damaged area of AA2024 and AA7075 alloys. − Dieleman and co-workers observed self-healing activity of lithium carbonate additive on scratched epoxy coatings immersed in 0.05 M NaCl and related this effect to the release of Li ions in the damaged zone . To explain the unusual aluminum alloy passivation behavior of lithium under corrosive conditions some mechanisms have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy

Trentin

Harb

Uvida

et al. 2019

ACS Appl. Mater. Interfaces

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In this work, structural and active corrosion inhibition effects induced by lithium ion addition in organic-inorganic coatings based on polymethyl methacrylate (PMMA)-silica solgel coatings have been investigated. The addition of increasing amounts of lithium carbonate (0, 500, 1000 and 2000 ppm), yielded homogeneous hybrid coatings with increased connectivity of nanometric silica cross-link nodes, covalently linked to the PMMA matrix, and improved adhesion to the aluminum substrate (AA7075). Electrochemical impedance spectroscopy (EIS), performed in 3.5% NaCl aqueous solution, showed that the improved structural properties of

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Section: Introductionmentioning

confidence: 99%

Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy

Trentin

Harb

Uvida

et al. 2019

ACS Appl. Mater. Interfaces

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“…In particular, a crystal structure like layered-double hydroxide is found in Figure 9(b), suggesting the formation of a protective Zn-Co layer as a result of the inhibitive reaction of Co 2+ . This layered morphology is commonly observed when using a metallic salt as an inhibitor for the protection of alloys [15,25,26]. When analyzed the surface by XRD (Figure 10), an existence of zinc cobalt hydroxide Zn 2 Co 3 (OH) 10 •2H 2 O as a principal product was reported (52.5%).…”

Section: B Morphological Surface Observations Of Galvanized Steel After Eis Measurementsmentioning

confidence: 64%

Corrosion Inhibition of Galvanized Steel by Cobalt(II) Nitrate

Thái

Trinh

Pham

et al. 2021

e-J. Surf. Sci. Nanotechnol.

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This study presents the inhibitive property of Co(II) ions in the corrosion protection of commercial hot-dip galvanized steel in aggressive solution. The polarization measurements reveal the action of Co(II) cations in the anodic branch with the inhibitive efficiency determined at 96% for 0.01 M of Co(II). The corrosion resistance was reinforced by a passive layer formed at Zn surface, that was assessed by the electrochemical measurements. The existence and the crystal structure of this protective layer was analyzed by field-emission scanning electron microscopy observations. X-ray diffraction analysis was confirmed the formation of zinc cobalt hydroxide and cobalt zinc oxide on the Zn surface that attributed to the inhibitive action of the Co cations.

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“…which is in sharp contrast to the surface without a protective layer [Figure 6(b)]. It is noted that this layer is generated in the presence of oxygen [6] and has a crystal morphology like layered double hydroxide usually formed on aluminum [7].…”

Section: Inhibition Properties Of LI Ions For Aluminum Alloy Substratementioning

confidence: 99%

Synthesis of Lithium-exchange Silica Particles for Corrosion Protection of Aluminum Alloys

Thái

Trinh

Pham

et al. 2020

e-J. Surf. Sci. Nanotechnol.

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This study focuses on the synthesis of lithium-exchange silica (Si/Li) particles and their corrosion protection for aluminum alloy substrates. Silica is synthesized via a sol-gel method as a raw material to prepare Si/Li in a saturated lithium nitrate solution. The obtained samples are characterized by X-ray diffraction, field emission scanning electron microscopy, zeta potential measurements, Fourier transform infrared spectroscopy, and inductively coupled plasma mass spectroscopy. Inhibition properties of synthesized Si/Li are investigated by electrochemical impedance spectroscopy (EIS). The results show that Si/Li prepared in the saturated lithium nitrate solution has a high content of loaded lithium. This amount relates to a high and stable corrosion protection of Si/Li in the electrolyte solution for the aluminum alloy substrate. After 96 h of immersion in the electrolyte solution, electrochemical results show a high value of an inhibition efficiency up to 98%. Water-based epoxy coatings containing Si/Li are also prepared to highlight their corrosion protection efficiency for the aluminum alloy substrate. Concerning the EIS measurement results, the coating containing 5 wt% Si/Li shows high and stable barrier properties for a long immersion time in the protection of the aluminum alloy substrate.

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Active corrosion protection of various aluminium alloys by lithium‐leaching coatings

Cited by 30 publications

References 31 publications

Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy

Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy

Corrosion Inhibition of Galvanized Steel by Cobalt(II) Nitrate

Synthesis of Lithium-exchange Silica Particles for Corrosion Protection of Aluminum Alloys

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