A novel corrosion inhibitive system comprising Zn-Al LDH and hybrid sol-gel silane nanocomposite coating for AA2024-T3

Mohammadi, Iman; Shahrabi, T.; Mahdavian, M.; Izadi, Mahdi

doi:10.1016/j.jallcom.2022.164755

Cited by 33 publications

(5 citation statements)

References 75 publications

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“…TGA studies have shown that increasing the siloxane crosslinking increases the thermal stability of the resulting films, which is evidenced by the activation energy values. Contact angle studies showed that it had an increase in its hydrophobicity 23 .…”

Section: Structural Analysismentioning

confidence: 99%

Organic-Inorganic Films with Anticorrosive and Bactericidal Properties for Titanium Implants

Kayser,

Mueller,

Soares

et al. 2023

Mat. Res.

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This study seeks to synthesize, by the sol-gel method, an organic-inorganic hybrid coating of polyurethane, siloxane and silver nanoparticles to cover titanium prostheses, aiming to act as an anticorrosive protection barrier, inhibiting the release of metallic ions in the human body. In this context, a hybrid based on the TEOS (tetraethyl orthosilicate) alkoxide precursor was used to carry out the acid hydrolysis/condensation process. Then, silver nanoparticles were added, and the mixture was done with the incorporation of polycaprolactone diol, followed by the addition of hexamethylene diisocyanate, to form polyurethane. The hybrid coatings were applied on titanium plates, and morphological, physical-chemical and electrochemical characterizations were carried out, as well as the evaluation of bactericidal and antifungal activity, in order to evaluate the performance of the coatings and the influence of diferente concentrations of silver nanoparticles (10 mL, 20 mL and 40 mL). The results showed that although Híbrido 10 (lowest concentration of silver nanoparticles, 10 mL) presented the best morphological characteristic without cracks and with satisfactory roughness to obtain the best bacterial behavior, the Híbrido 20 sample presented the best electrochemical performance.

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Section: Structural Analysismentioning

confidence: 99%

Organic-Inorganic Films with Anticorrosive and Bactericidal Properties for Titanium Implants

Kayser,

Mueller,

Soares

et al. 2023

Mat. Res.

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“…A large number of Al, Zn, N, and O elements are distributed in the LDH-NO 3 film in Figure 2a, among which the Al element comes from the AA2024 matrix, and the Zn, N, and O elements mainly come from the LDH-NO 3 film, suggesting that the LDH-NO 3 film is densely grown and tightly bonded on the surface of the matrix [38]. In addition, the thickness and structure of the LDH films can be qualitatively analyzed through the cross-section morphologies and corresponding EDS mapping results [39][40][41]. The thickness of the LDH-NO 3 film is roughly 2 µm, and after anion exchange reaction loading 8HQ for 6 h, the thickness changes significantly to about 6 µm.…”

Section: Effect Of Anion Exchange Reaction Time On the Morphology And...mentioning

confidence: 99%

LDH-Based “Smart” Films for Corrosion Sensing and Protection

et al. 2023

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In a “smart” corrosion-protective coating system, both the active anti-corrosion and the early corrosion detection of underlying metals are highly required. It is practical significant to develop materials that possess self-detecting of the early local corrosion and self-healing of coating defects simultaneously. The organic compound 8-hydroxyquinoline (8HQ) is an effective inhibitor and a fluorescent sensor probe for corrosion of aluminum alloy. Therefore, a layer double hydroxide (LDH) nanocontainer film loaded with the 8HQ was developed for the active corrosion protection purpose of aluminum alloy AA2024. In corrosive environments, the 8HQ are released from LDH film to inhibit the corrosion process, leading to the loss of the complexation with Al3+ ions in LDH laminates, thus turning off fluorescence. Results show that the LDH film loaded with 8HQ composites can improve the anti-corrosion performance of the film by releasing corrosion inhibitors on demand. Simultaneously, due to the complexation of 8HQ and Al3+ ions, the LDH film is fluorescent at the initial stage under ultraviolet light, and then becomes non-fluorescent at the corrosion sites, indicating the corrosion evolution process of the coating. The 8HQ-loaded LDH film with self-healing and self-detecting dual functions provides promising opportunities for the effective corrosion protection of aluminum alloy due to its “smart” and multifunctional properties.

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“…It was well-known that LDHs released inhibitors through anion exchange, in contrast, inhibitors were released by exchanging with interlayered cations in MMTs. Based on these premises, Mohammadi et al [85,86] combined the anionic (LDH) with cationic (MMT) ion-exchange materials to encapsulate the corrosion inhibitors (Ce 3+ and DEDTC), which were incorporated into hybrid silane coating on aluminium alloys. The schematic diagram of the inhibition mechanism for the coating with the presence of inhibitors-loaded LDHs and MMTs was illustrated in Figure 6(A).…”

Section: Smart Release Based On Multi-stimulimentioning

confidence: 99%

Smart corrosion inhibitors for controlled release: a review

Zhou

Dong

Wei

et al. 2022

Corrosion Engineering, Science and Technology

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Metal corrosion has been one of the most urgent problems bringing about great economic loss and life threats worldwide. Corrosion inhibitors can prevent metal from corrosion when directly added to corrosive media, which is a low-cost and efficient strategy towards corrosion protection. However, the corrosion protection ability cannot be durable without continuous additions of corrosion inhibitors. Micro/nano-containers encapsulated with corrosion inhibitors offer promising opportunities for delaying the corrosion process and prolonging the service period, regarded as smart corrosion inhibitors that can respond to stimuli spontaneously and release on demand. The review focuses on the diverse ambient stimuli and actively responsive mechanisms of smart corrosion inhibitors. Furthermore, the present drawbacks and underexplored possibilities of current research studies are pointed out, and future perspectives are prospected for smart corrosion inhibitor applications.

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A novel corrosion inhibitive system comprising Zn-Al LDH and hybrid sol-gel silane nanocomposite coating for AA2024-T3

Cited by 33 publications

References 75 publications

Organic-Inorganic Films with Anticorrosive and Bactericidal Properties for Titanium Implants

Organic-Inorganic Films with Anticorrosive and Bactericidal Properties for Titanium Implants

LDH-Based “Smart” Films for Corrosion Sensing and Protection

Smart corrosion inhibitors for controlled release: a review

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