Corrosion resistance of flaky aluminum pigment coated with cerium oxides/hydroxides in chloride and acidic electrolytes

Niroumandrad, S.; Rostami, M.; Ramezanzadeh, Bahram

doi:10.1016/j.apsusc.2015.09.195

Cited by 34 publications

(20 citation statements)

References 34 publications

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“…The peaks appearing at binding energies of 529.2, 531.8, and 532.8 eV demonstrated that there were three kinds of oxygen O 1s signals in CeO 2 nanoparticles. According to the references, the lowest binding energy peak at 529.2 eV was attributed to the lattice O (O lat ) in CeO 2 ; the middle binding energy peak at 531.8 eV was ascribed to the surface O (O sur ); the 532.8 eV peak was due to the hydroxyl on the surface of CeO 2 . Surface oxygen content plays an important role in catalytic performance for CeO 2 materials .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of CeO₂ nanoparticles with different morphologies and their properties as peroxidase mimic

Zhang

Wang

et al. 2018

J Am Ceram Soc

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The overall objective of this work was to identify and determine the controlling factors of catalytic activity of CeO2 nanoparticles with different properties. Therefore, four kinds of CeO2 nanoparticles are successfully synthesized and used as peroxidase mimics. The results reveal that the catalytic activity is related to specific surface area and surface oxygen (Osur) content. For different CeO2 nanoparticles, specific surface area is the leading factor of catalytic activity. The catalytic activity increases with the increasing specific surface area. If the CeO2 nanoparticles have similar specific surface area, the less Osur contains, the lower catalytic activity will be. Meanwhile, crystallinity is not the influence factor of catalytic activity. Bamboo‐like CeO2 (B‐CeO2) nanoparticles show excellent catalytic activity and the reaction conditions are optimized. Furthermore, the catalytic activity of B‐CeO2 nanoparticles decreases very slightly after 15 cycles of the catalysis experiment. Therefore, B‐CeO2 nanoparticles can serve as effective recyclable peroxidase mimics.

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Section: Resultsmentioning

confidence: 99%

Synthesis of CeO₂ nanoparticles with different morphologies and their properties as peroxidase mimic

Zhang

Wang

et al. 2018

J Am Ceram Soc

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“…The peaks at 529.7 eV and 530.9 eV are related to the CeO 2 and Ce 2 O 3 , respectively 22,74,75 . The peaks at 532.22 eV and 533.43 eV are due to the Al-O bonded and Ce(OH) 3 , respectively 22,74,75 . The high-resolution spectra of the Al2p contain 3 main peaks at binding energy of 72.8, 75.1 and 78.23 eV assigned to Al, Al-O, and Al-S, respectively 22,76 .…”

Section: Resultsmentioning

confidence: 99%

“…Due to the limitation of the chromium-based compounds, various pigments have been employed to improve the corrosion performance of metallic substrates [17][18][19][20][21] . As a result, the research works are being sought to find a more benign corrosion prevention technologies based on eco-friendly pigments 12,[22][23][24] . Rare earth metal compounds are suggested as alternative materials for chromates to improve the corrosion properties of the metallic substrates 16,[25][26][27][28][29][30][31] .…”

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confidence: 99%

Cerium/diethyldithiocarbamate complex as a novel corrosion inhibitive pigment for AA2024-T3

Mohammadi

Shahrabi

Mahdavian

et al. 2020

Sci Rep

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In this work, cerium-diethyldithiocarbamate (Ce-DEDTC) complex was synthesized as a novel anticorrosion pigment. the structure of the synthesized pigment was characterized by employing fourier transfer infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, inductively coupled plasma optical emission spectroscopy, and ultraviolet-visible spectroscopy. All of the characterization techniques showed that the Ce-DEDTC pigment was successfully produced. The electrochemical tests were used to investigate the subsequence effect of the synthesized complex on the corrosion behavior of the AA2024-T3. AA2024-T3 showed a wide passive range in the presence of the Ce-DEDTC pigment. Scanning electron microscopy, optical microscopy, X-ray photoelectron spectroscopy, and contact angle tests were employed to investigate the effect of the synthesized pigment on aluminum surface properties. The result illustrated that the existence of the Ce-DEDTC complex led to the creation of a thin film on the AA2024-T3 surface, which was significantly inhibited the localized corrosion of the aluminum alloy.Due to high strength to weight ratio and low density, aluminum, and its alloys have found various industrial applications 1-3 . AA2024-T3 which is the precipitation hardening alloy, has various engineering applications in aeronautics and aerospace industries 4 . S-phase Al 2 MgCu and Al-Cu-Fe-Mn are the main intermetallic compounds in the structure of the 2024-T3 aluminum alloy 4,5 . In the presence of these intermetallic compounds, the substrate is locally degraded, especially in the presence of halide species 5 . The utilization of coatings, especially organic coatings, is a promising method to improve the corrosion performance of aluminum alloy against aggressive solutions 6 . But, it is well-known that the organic coatings alone don't have the long-term protective behavior against the aggressive ions. Due to the permeation of the oxygen, water, and corrosive ions through the organic coatings, as the main corrosive species for the metallic substrates, the metal is degraded even in the presence of the organic coatings 7 . Therefore, for improving the ability of the organic coatings against the destructive species, the use of other materials is a requirement.Inhibitive pigments are the main additives used to improve the corrosion protection functioning of the organic coatings in corrosive media. Pigments are utilized in different types and they have different protection mechanisms [8][9][10] . It is generally believed that the pigments are the fine particle size and insoluble materials used as colloidal dispersions which are added to the organic coatings for various purposes 11 . Providing the color, modifying the applications of the coatings, reducing the cost and improving the performance of the coatings are the main pigment applications 11 . Enhancing the organic coatings corrosion inhibition is the most important application of the pigments. Although it was mentioned that the pigments are the insoluble materials, the corrosi...

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“…The encapsulation of aluminium pigment can be achieved using inorganic, organic or inorganic-organic polymers [29]. To encapsulate with organic polymers, insitu polymerization is used.…”

Section: Encapsulation Methodsmentioning

confidence: 99%

The Treatment of Aluminium Pigments with Inorganic Polymers for Environment-Friendly Applications

Dragnea¹,

Gudovan²,

Zaharia³

et al. 2019

Rev. Chim.

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Aluminium pigments are used in industrial and decorative coatings, automotive industry and printing inks. The encapsulation of aluminium pigments is used because the industry wants to avoid the organic solvents, for environmental reasons, by shifting towards water-borne systems. However, aluminium pigments easily react with water and a large amount of hydrogen is released leading to degradation of optical properties. This work presents experimental results concerning the encapsulation of aluminium pigments in silica matrices, by a sol-gel method using TEOS as precursor and ethylendiamine or ammonia as catalysts for the hydrolysis and condensation reactions. The samples of encapsulated pigments were characterized by gas stability tests: a boiling method and a gassing method.

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Corrosion resistance of flaky aluminum pigment coated with cerium oxides/hydroxides in chloride and acidic electrolytes

Cited by 34 publications

References 34 publications

Synthesis of CeO₂ nanoparticles with different morphologies and their properties as peroxidase mimic

Synthesis of CeO₂ nanoparticles with different morphologies and their properties as peroxidase mimic

Cerium/diethyldithiocarbamate complex as a novel corrosion inhibitive pigment for AA2024-T3

The Treatment of Aluminium Pigments with Inorganic Polymers for Environment-Friendly Applications

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Corrosion resistance of flaky aluminum pigment coated with cerium oxides/hydroxides in chloride and acidic electrolytes

Cited by 34 publications

References 34 publications

Synthesis of CeO2 nanoparticles with different morphologies and their properties as peroxidase mimic

Synthesis of CeO2 nanoparticles with different morphologies and their properties as peroxidase mimic

Cerium/diethyldithiocarbamate complex as a novel corrosion inhibitive pigment for AA2024-T3

The Treatment of Aluminium Pigments with Inorganic Polymers for Environment-Friendly Applications

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Synthesis of CeO₂ nanoparticles with different morphologies and their properties as peroxidase mimic

Synthesis of CeO₂ nanoparticles with different morphologies and their properties as peroxidase mimic