Fabrication of MIL-88A sandwiched in graphene oxide nanocomposites using a green approach to induce active/barrier protective functioning in epoxy coatings

Alipanah, Nariman; Yari, H.; Mahdavian, M.; Ramezanzadeh, Bahram; Bahlakeh, Ghasem

doi:10.1016/j.jclepro.2021.128928

Cited by 34 publications

(8 citation statements)

References 71 publications

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“…Actually, by creating a protective layer, corrosion specimens cannot penetrate into the cathodic sites. Therefore, this decrease in delamination of the final coating indicates the formation of strong adhesive bonds between the Ce and Ce-ZIF8 coating and epoxy …”

Section: Resultsmentioning

confidence: 99%

“…Therefore, this decrease in delamination of the final coating indicates the formation of strong adhesive bonds between the Ce and Ce-ZIF8 coating and epoxy. 39 Corrosion Performance Evaluation of MS/EC, MS/Ce/ EC, and MS/Ce-ZIF8/EC Coatings after Scratching. In order to achieve a better assessment of the anti-corrosion features of the Ce-based conversion layer treated by ZIF8 in the two-layer coating system, EC (epoxy coating) was applied onto the neat, MS/Ce, and MS/Ce-ZIF8 substrates, and EIS test was applied on the scratched coating.…”

Section: Fe-sem−edxmentioning

confidence: 99%

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Enhancing Self-Healing and Adhesion Bonding Properties: Investigating the Promising Potential of Ce-ZIF8 MOF Hybrid Thin Films as pH-Responsive Nanocoatings

Falahaty marvast,

Gholambargani,

Ramezanzadeh

et al. 2023

Langmuir

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Further modification of the pre-treated steel surface with cerium conversion coating was performed using a novel porous coordination polymer (PCP) based on zeolitic imidazole framework-8 (ZIF8) in order to reduce the defect and disorders of the surface. The treated mild steels (MS) with Ce (MS/Ce) and Ce-ZIF8 (MS/Ce-ZIF8) were characterized by the GIXRD, Raman, and FT-IR, and via contact angle and FE-SEM, their surface features were investigated. The protection performance of the samples against corrosion was evaluated in the saline solution media using electrochemical impedance spectroscopy (EIS, in the long term) and polarization tests. The results evidenced that applying the ZIF8 nanoparticles onto the Ce-treated steel surface increased the total resistance value after 24 h of immersion (49.47%). Afterward, the ZIF8-modified coating (MS/Ce and MS/Ce-ZIF8) impact on the epoxy coating protection function was characterized by EIS (in the scratched form), salt spray (5 wt % salts), cathodic disbonding (at 25 °C), and pull-off tests. The EIS outcomes of the scratched coatings proved approximately a 51.29% increase in R t of the MS/Ce-ZIF8/EC sample compared with the MS/EC sample after 24 h of immersion. The cathodic disbonding test results after 24 h of exposure revealed that the delamination area of the coating decreased in the modified sample, and the delamination radius of the epoxy coating was about 4.78, 2.96, and 2.0 mm for the MS/EC, MS/Ce/EC, and MS/Ce-ZIF8/EC samples, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Fe-sem−edxmentioning

confidence: 99%

Enhancing Self-Healing and Adhesion Bonding Properties: Investigating the Promising Potential of Ce-ZIF8 MOF Hybrid Thin Films as pH-Responsive Nanocoatings

Falahaty marvast,

Gholambargani,

Ramezanzadeh

et al. 2023

Langmuir

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“…In the meantime, the Zr metal in UiO-66 forms a complex with OH – formed at the cathodic site to prevent corrosion in this area. Furthermore, the organic compounds in the UiO-66 ligand form a film with metal ions (Fe 2+ ) at the anode site and restrict the corrosion Figure illustrates schematically the inhibition mechanism of the nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Development of pH-Sensitive UiO-66/Polyaniline Nanohybrids with Self-Healing Anticorrosive Performance in Epoxy Coatings

Dabaleh

Shojaei

Nematollahzadeh

et al. 2023

Ind. Eng. Chem. Res.

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The present research focused on the corrosion protection behaviors of epoxy coatings filled with polyaniline (PANI) and its nanohybrid with a Zr-based metal−organic framework (MOF), i.e., UiO-66. Hybrid nanoparticles were synthesized at various weight percentages of UiO-66 in the nanohybrid, including 5, 25, and 50 wt % named H5, H25, and H50, respectively. The morphological features of the nanoparticles characterized with various techniques showed that the nanohybrids with higher UiO-66 content, i.e., H25 and H50, provided a core− shell microstructure with a porous core covered by the PANI outer shell. Analysis of the saline solution (3.5 wt % NaCl) containing the nanoparticles indicated the pH-sensitive release of organic compounds and Zr cations from UiO-66, which could act as active inhibitors against corrosion. The corrosion behavior of the mild steel plate immersed in a saline solution containing the extracts of the nanoparticles, investigated by the Tafel polarization method and electrochemical impedance spectroscopy (EIS), showed that the hybrid nanoparticles played strong active inhibition compared with neat PANI. Among the nanohybrids, H25 exhibited maximum inhibition performance with 56.7% inhibition after 24 h of immersion. Active (self-healing) corrosion behavior of scratched epoxy coatings containing 0.15 wt % nanoparticles was revealed that the epoxy coating with H25 and H50 exhibited 170 and 155% improvement (total resistance (R t )) at optimal immersion times of 5 and 3 h, respectively. Field emission scanning electron microscopy (FE-SEM) observation of the scratched area after corrosion, confirmed by energy-dispersive X-ray spectroscopy (EDS) analysis, revealed the formation of inhibitor films in those areas, which increased the protectiveness of the coatings.

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“…The EDS results also demonstrated that the CNF sample contains the lowest quantity of oxygen, whereas the CNF−PDA−La sample had the highest oxygen content. Moreover, the I 2D /I G ratio, which is inversely proportional to the number of graphene layers 50 was lower for the CNF−PDA sample than that of the CNF sample, implying the presence of more graphene layers on its surface.…”

Section: Raman Spectroscopymentioning

confidence: 89%

pH-Sensitive Polydopamine–La (III) Complex Decorated on Carbon Nanofiber toward On-Demand Release Functioning of Epoxy Anti-Corrosion Coating

et al. 2022

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The high aspect ratio and unique thermal and electrical characteristics of carbon nanofiber (CNF) made it an ideal physical barrier against the penetration of corrosive ions. However, the poor compatibility of the CNF with the polymer matrix and the lack of active corrosion inhibitors are the key limitations of this nanomaterial, resulting in short-term anti-corrosion resistance. An intelligent self-healing epoxy (EP) coating, including CNF modified with a polydopamine (PDA)−La 3+ complex, was successfully fabricated to overcome these issues. Electrochemical impedance spectroscopy (EIS) evaluation implied that mild steel (MS) submerged in a 3.5 wt % NaCl solution containing the CNF− PDA−La extract had a total corrosion resistance (R T ) of 3107 Ω cm 2 after 24 h, which is much greater than the MS immersed in the blank solution (1378 Ω cm 2 ). Furthermore, the potentiodynamic polarization analysis indicated a 50% reduction in the corrosion rate (CR) of the MS soaked in the solution containing released PDA and La 3+ inhibitors compared to the blank solution. EIS and salt spray analysis were used to assess the self-healing capabilities of epoxy coatings incorporating modified CNFs. EIS assessment of scratched coatings revealed a 117% improvement in R T of the CNF−PDA−La/EP coating compared to the Blank/EP after 10 h of immersion in the saline solution. This enhancement is due to the intelligent release of PDA and La 3+ inhibitors at the scratch sites, which can mitigate MS corrosion by forming a PDA−Fe complex and the deposition of La(OH) 3 on the MS surface. The salt spray test results also exhibited the CNF−PDA−La/EP coating's superior anti-corrosion capabilities after 20 days. Hence, this research presents a logical approach for developing anti-corrosion coatings with improved nanofiller compatibility and self-healing characteristics.

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Fabrication of MIL-88A sandwiched in graphene oxide nanocomposites using a green approach to induce active/barrier protective functioning in epoxy coatings

Cited by 34 publications

References 71 publications

Enhancing Self-Healing and Adhesion Bonding Properties: Investigating the Promising Potential of Ce-ZIF8 MOF Hybrid Thin Films as pH-Responsive Nanocoatings

Enhancing Self-Healing and Adhesion Bonding Properties: Investigating the Promising Potential of Ce-ZIF8 MOF Hybrid Thin Films as pH-Responsive Nanocoatings

Development of pH-Sensitive UiO-66/Polyaniline Nanohybrids with Self-Healing Anticorrosive Performance in Epoxy Coatings

pH-Sensitive Polydopamine–La (III) Complex Decorated on Carbon Nanofiber toward On-Demand Release Functioning of Epoxy Anti-Corrosion Coating

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