Improved performance of cerium conversion coatings on steel with zinc phosphate post-treatment

Ramezanzadeh, Bahram; Vakili, Helma; Amini, Reza

doi:10.1016/j.jiec.2015.05.026

Cited by 76 publications

(30 citation statements)

References 46 publications

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“…Another efficient approach to enhance the electrochemical performance of Mg alloy in aqueous solution is surface engineering, which includes the surface coating by wet process (anodization); plating and chemical conversion. [23][24][25][26] The present work has been undertaken to adopt chemical treatment of Mg alloy which is helpful and simple approach to improve the electrochemical properties of surface lm. In addition, the inhibitor is a useful way to change corrosion process of Mg alloy, specically; a small amount of inhibitor appears to be able to restrain the corrosion rate of Mg alloy in solution.…”

Section: Introductionmentioning

confidence: 99%

The effects of NaF concentration on electrochemical and corrosion behavior of AZ31B magnesium alloy in a composite electrolyte

Yang

Javed

et al. 2017

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

The effects of NaF concentration on electrochemical and corrosion behavior of AZ31B magnesium alloy in a composite electrolyte

Yang

Javed

et al. 2017

RSC Adv.

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“…It has been used as inorganic pigment for paints, plastics and ceramics, corrosion inhibition in metallic alloys like 2024 aluminum alloy, and improving performance of cerium conversion coatings to prevent corrosion of steel [1][2][3][4][5]. It has been environmentally friendly for using as photocatalytic material and antibacterial action of Escherichia coli [6].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and photonic absorbance of Ce2(MoO4)3 nanocrystal synthesized by microwave–hydrothermal/solvothermal method

et al. 2016

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In this research, cerium (III) nitrate hexahydrate (Ce(NO 3 ) 3 Á6H 2 O) and ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 Á4H 2 O) with Ce 3? -to-Mo 6? molar ratio of 2:3 were dissolved in 40 ml different solvents of deionized (DI) water, polyethylene glycol (PEG) and ethylene glycol (EG) to form different solutions which were followed by adjusting pH from the traditional values to 7.0 and 10.0 with 1 molÁL -1 sodium hydroxide (NaOH). Subsequently, the solutions were processed by 270-W microwave-hydrothermal/solvothermal method. Phase, morphology, vibrational modes and photonic properties were fully characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectrophotometry, ultraviolet-visible (UV-Vis) absorption and photoluminescence (PL) spectroscopy. The as-synthesized products were pure cerium molybdenum oxide (Ce 2 (MoO 4 ) 3 ) of nanoparticles clustered together as nanoplates in DI water and PEG solvents, and of spindle-like nanoparticles in EG solvent, including the presence of Ce-O-H mode and MoO 4 units. The results show that direct energy gaps of the first two have the same value of 2.30 eV, and that of the last is 2.80 eV, including their blue emission at the same wavelength of 488 nm.

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“…It's is due to the formation of corrosion product on the AA2024-T3 surface. It is generally believed that the changing in surface chemical composition and roughness are the main reason for the changing in CA of specimens 65 . For the blank sample, as seen in the previous section of this work, the aluminum hydroxide/oxide is fabricated on the specimen surface.…”

Section: Resultsmentioning

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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Improved performance of cerium conversion coatings on steel with zinc phosphate post-treatment

Cited by 76 publications

References 46 publications

The effects of NaF concentration on electrochemical and corrosion behavior of AZ31B magnesium alloy in a composite electrolyte

The effects of NaF concentration on electrochemical and corrosion behavior of AZ31B magnesium alloy in a composite electrolyte

Photoluminescence and photonic absorbance of Ce2(MoO4)3 nanocrystal synthesized by microwave–hydrothermal/solvothermal method

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

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