Synthesis and anticorrosive performance evaluation of zinc vanadate pigment

Bhoge, Y.E.; Patil, V.J.; Deshpande, Tushar D.; Kulkarni, Ravindra D.

doi:10.1016/j.vacuum.2017.08.047

Cited by 15 publications

(4 citation statements)

References 20 publications

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“…Transition metal oxides, especially vanadates, are functional materials with increasing attention in nanotechnological fields. Their interesting optical, electrical, biological, and thermal properties are expanding their use in many industrial areas, such as photocatalyst [1], batteries [2], sensors [3], solar cells [4], anti-bacterial additive in paints [5,6], and biomedical devices [7]. Among the vanadate compounds, silver vanadates are considered one of the most interesting, due to their remarkable properties, including higher crystallinity, narrow band gap, and significant anti-bacterial activity [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

et al. 2019

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Silver vanadate, especially β-AgVO 3 , have a wide range of technological applications due to remarkable biological, optical, and electrical features. The structure, morphology, and properties of β-AgVO 3 are directly affected by synthesis conditions. A comparative study between two different synthesis routes (precipitation and hydrothermal) of β-AgVO 3 was systematically investigated in this work. X-ray diffraction, Raman spectroscopy, scanning electron microscopy, zeta potential, and UV-visible spectrometry results showed that the hydrothermal method produced more homogeneous samples of β-AgVO 3 , with elevated purity and crystallinity. In addition, the sample of β-AgVO 3 obtained by hydrothermal method had a wire-like morphology while that obtained by precipitation had irregular shape. Finally, the hydrothermal procedure showed more elevated reproducibility.

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Section: Introductionmentioning

confidence: 99%

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

et al. 2019

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“…These peaks diminish after calcination at 400 °C. The absorption bands in the range of 400-700 cm −1 could be attributed to the ZnO stretching modes [3]. The observed peak at 645 cm −1 for the calcined sample could be attributed to the ZnO [9].…”

Section: Ftir Spectroscopymentioning

confidence: 87%

“…Medjnoun et al [26] reported the synthesis of nanostructured Zn1_xVxO thin films with high vanadium content elaborated by rf-magnetron sputtering. [3] have discussed the synthesis of zinc vanadate by controlled coprecipitation of Zn(CH 3 COO) 2 •2H 2 O using NaVO 3 as precipitant in presence of non-ionic Polysorbate 80 surfactant in thin film mixed flow glass reactor. Recently, Mondal et al [29] have reported the synthesis of robust cubooctahedron Zn 3 V 2 O 8 using simple method and have studied its efficiency for photocatalytic dye degradation in water.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of high yield two dimensional zinc vanadate nanoflakes

et al. 2019

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Zinc vanadate nanoflakes, with highly porous structure in the range of 50 nm wall thickness, were successfully prepared from ion solutions of the corresponding precursors by a simple co-precipitation method. The prepared zinc vanadate nanoflakes were inspected by X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM), High Resolution transmission electron microscope (HRTEM), fourier transform infrared (FTIR), Raman spectroscopy and X-ray fluorescence (XRF) techniques. The formed nanoflakes phase, after drying at 60 °C, is zinc hydroxide vanadium oxide hydrate. After calcination at 400 °C zinc vanadium oxide phases were formed as confirmed from XRD analysis. FE-SEM shows the formation of two dimensional (2D) zinc vanadate nanoflakes which caused by familiarizing shielding of V(OH) 4 − ions on Zn 2+ surface. The absence of ZnO Raman peaks indicates that the bulk phase was a pure zinc vanadate phase. Schematic mechanism of the surface morphology of the zinc vanadate formation was suggested. The high yield of the unique structure obtained by this simple synthesis method might open the door for vital industrial applications of the prepared material and synthesis of other nanostructured materials.

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“…Vanadate conversion coating can reduce the reactivity and improve the durability of metals such as Zn, Mg, and Al alloys for its ability to resist localized corrosion and to promote paint adhesion. − So, it has aroused an ongoing concern as a suitable candidate for chromating. A surface conversion process for substrate metals based on the acidic pentavalent vanadium (V V ) formulation has been shown to impart protection to some extent by the V V species leached from the coating. − However, V V species has a complex aqueous chemistry, as shown in Figure a .…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition of the Zinc Thermo-Diffusion Coating by Vanadate Conversion Coatings

Gao,

Huang,

Wang

et al. 2023

ACS Appl. Eng. Mater.

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The inhibition of zinc thermo-diffusion coating corrosion by tetravalent vanadium (VIV)-based conversion coating was investigated in this work, aiming at the development of chemical conversion processes. The coated surfaces were examined using SEM, EDS, XPS, corrosion tests in salt spray, and electrochemical impedance spectroscopy (EIS) measurements in order to build a meaningful relationship between the coating element and the evolution of its chemical state when the surface encounters corrosion. VIV conversion coating shows a resistance feature to corrosion, in which zinc thermo-diffusion coating in exposure to salt spray can be protected due to the irreversible formation of a tetravalent–trivalent mixed-state vanadium film layer. From a thermodynamic point of view, the coating layer acts as a reservoir of VIV to fuel passivation, and then active VIV leached from the layer structure can migrate to the newly formed defects and occupy susceptible sites, resulting in the regeneration of a protective barrier layer by partial reduction to trivalent vanadium (VIII) both on the surface and at the defect. Finally, the formation of the VIII layer seems to be essential for the long lifetime of coatings through blocking the aggressive medium and further VIV reduction.

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Synthesis and anticorrosive performance evaluation of zinc vanadate pigment

Cited by 15 publications

References 20 publications

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

Facile synthesis of high yield two dimensional zinc vanadate nanoflakes

Corrosion Inhibition of the Zinc Thermo-Diffusion Coating by Vanadate Conversion Coatings

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