Synthesis of Me2 TiO4 and MeFe2 O4 spinels and their use in organic alkyd resin-based anticorrosion coatings

Kalendová, Andréa; Vesely, David L.; Kohl, Miroslav

doi:10.1515/corrrev-2013-0050

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…It seems that there is certain intrinsic randomness with regard to size and orientation of the nanostructures and this depends on the preparation technique used and can be specific for a particular method of preparation. Until now, the anticorrosive properties of ferrites obtained by the ceramic method have been studied (Kalendova, 2000;Zubielewicz and Gnot, 2004;Kalendova and Vesely, 2008;Deya et al, 2010;Miszczyk and Darowicki, 2011;Hao et al, 2012;Kalendova et al, 2014;Benda and Kalendova, 2017;Chaudhry et al, 2017). In this work, a test of nano-sized ferrites was made and the obtained results were compared with the results for the same ferrites but obtained by the ceramic method, previously published (Miszczyk and Darowicki, 2011).…”

Section: Resultsmentioning

confidence: 88%

Protective and Suppressing Electromagnetic Interference Properties of Epoxy Coatings Containing Nano-Sized NiZn Ferrites

Miszczyk

2020

Front. Mater.

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Nano-crystalline ferrites with the chemical formula Ni x Zn (1−x) Fe 2 O 4 , where x = 0, 0.2, 0.4, 0.6, 0.8, 1.0, were synthesized using a co-precipitation method. The obtained ferrites were investigated by X-ray diffraction (XRD). The corrosion inhibiting behavior of nano-sized ferrites was tested using carbon steel samples and 10% aqueous ferrite extracts. Results were compared with previous data obtained for micro-sized ceramic ferrites. Nanoparticles show more favorable properties regarding inhibiting corrosion processes on steel. Two Millimeter thick epoxy coatings on steel containing 10% vol. of nano-sized ferrites has been investigated as a microwave absorber. The microwave reflectivity of the coating was measured within the range from 6.5 to 15 GHz. Both the nano-and micro-sized ferrites included in the coatings exhibited different reflection loss spectra. The greatest attenuation on a level of 8-16 dB was observed. The nano-ferrite-filled epoxy coating exhibited a higher minimum reflection frequency in comparison with the micro-ferrite-filled coating. A frequency shift of 1-2 GHz was observed.

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Section: Resultsmentioning

confidence: 88%

Protective and Suppressing Electromagnetic Interference Properties of Epoxy Coatings Containing Nano-Sized NiZn Ferrites

Miszczyk

2020

Front. Mater.

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“…in the paper by Havlík et al (2007). Test results suggest that such pigments are promising for practical use (Emira, 2005(Emira, , 2006Havlík et al, 2007;Benda and Kalendová, 2013;Ahmed and Selim, 2010;Ahmed et al, 2014;Kalendová et al, 2014). The present paper includes the result obtained for a ferrite -ZnO -Zn-based system (ZnO -zinc oxide).…”

Section: Introductionmentioning

confidence: 86%

Development and preparation of oxide mixture-based pigments for anticorrosion paints

Benda

Kalendová

2017

PRT

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Purpose The aim of the work is to develop an anticorrosion pigment based on an oxide mixture with lamellar particles. The pigments are prepared from lamellar zinc, zinc oxide and magnetite by calcination. An alkaline earth carbonate is added when embedding a third cation in the lattice of the ferrite that forms the envelope of the lamellar zinc. The properties of the pigments are tested both in the powdered state and when embedded in an epoxy-ester system using different pigment volume concentrations (PVC). Design/methodology/approach The properties of paints containing synthesised oxide mixture-based pigments at various volume concentrations and with the Q factor – Q = PVC/CPVC = 0.65 – were examined (where CPVC is critical pigment volume concentration). A series of isometric ferrite pigments were also synthesised for a comparison. Paints of both types with PVC = 10, 15 and 20 per cent were formulated. Steel panels coated with the paints were subjected to corrosion and mechanical tests. Findings The oxide mixtures with lamellar particles were subjected to particle size analysis and found to make up a broad distribution curve. Electron microscopy photographs confirmed that the oxide mixture pigments contained lamellar particles with a surface layer. A high anticorrosion effect was achieved owing to the combination of different oxide types. Research limitations/implications The properties of the oxide mixtures with lamellar particles are described. Their particle distribution curves can be obtained by particle size analysis methods with a view to obtaining additional information on the status and properties of the pigment particles that may be useful in the development of better paints/coating materials. Practical implications Oxide mixtures with lamellar particles can be used in paints protecting construction steel. Originality/value The composition of the prepared oxide mixture-based pigments is novel. Each oxide acts by its own anticorrosion mechanism and the final beneficial effect is due to their concerted action.

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“…Summarizing the literature analysis, it can be concluded that the main vector of the direction associated with the use of complex oxides in the field of anticorrosive protection development is the synthesis, research and practical use of ferrite pigments. It is obvious that the factors that have influenced this choice, in addition to their high anticorrosive properties (Kalendová et al, 2015a(Kalendová et al, , 2015b) also include the iron oxides availability and low cost.…”

Section: Crystalline Structure and Inhibition Mechanismmentioning

confidence: 99%

Complex oxides – non-toxic pigments for anticorrosive coatings

Ziganshina

Степин

Карандашов

et al. 2020

ACMM

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Purpose The purpose of this paper is to search for toxic anticorrosive pigments’ substitute in protective coatings is one of the important tasks that the specialists in the field of steel corrosion face. Design/methodology/approach One of the ways to solve the problem of metal corrosion is to use complex oxides as pigments, which are characterized as low-toxic compounds and possess the ability to inhibit corrosion. Findings In the production of ferrites, it is possible to use production waste as raw material, and that makes it possible to reduce the price of the resulting product and solve environmental problems simultaneously. Originality/value Permanent growth of world production is accompanied by the increasing environment corrosiveness, associated with the intensification of air, water basin and soil pollution by industrial waste. This, as well as the continuously increasing operated metal stock, has recently made the tendency of metals’ total loss from corrosion steadily increasing. All of this points to the importance of studying corrosion processes and the systematic and effective fight against metal corrosion.

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Synthesis of Me2 TiO4 and MeFe2 O4 spinels and their use in organic alkyd resin-based anticorrosion coatings

Cited by 4 publications

References 24 publications

Protective and Suppressing Electromagnetic Interference Properties of Epoxy Coatings Containing Nano-Sized NiZn Ferrites

Protective and Suppressing Electromagnetic Interference Properties of Epoxy Coatings Containing Nano-Sized NiZn Ferrites

Development and preparation of oxide mixture-based pigments for anticorrosion paints

Complex oxides – non-toxic pigments for anticorrosive coatings

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