Properties of anti-corrosive ferrite pigment synthesized with the use of production waste

© 2018, International Multidisciplinary Scientific Geoconference. All rights reserved. Pigments of the inhibitory type are the active principle of most primers used to protect metals from corrosion. Developers of anticorrosive paint and varnish materials seek to replace chromium-containing pigments, which widely used until recently due to their toxicity, with more environmentally appropriate choices. These include ferrite pigments. It is known, that the most spread method for the synthesis of ferrites, which are complex oxides or salts of ferrous acid, is the joint calcination of iron oxides with oxides having basic properties. The aim of this work is an expansion of the raw material base to produce ferritic pigments by using as one of the initial components an aspiration dust (content of iron oxide exceeds 70 %) formed as a waste in steel-casting plants. Crushed brucite (natural magnesium oxide) was used as the second component. After their thorough mixing, the resulting mixture was calcined at the reaction temperature: MgО + Fe2O3 → MgFe2O4 (1) 6MgО + 4Fe3O4 + О2 → 6MgFe2O4 (2) with obtaining of magnesium ferrite. The course of the reaction was controlled by thermogravimetry and differential thermal analysis. Ferritic-magnetite structure formation was recorded by X-ray diffraction analysis. The variation of the synthesis’s temperature-time conditions made it possible to find the optimal parameters for obtaining ferrite. The synthesized ferrite was ground on a planetary mill. The studying of the painting and technical properties of the grinding product showed that it can be used as a pigment in the production of paints and varnishes. The results of electrochemical studies of steel in contact with the aqueous extract of ferritic pigment containing 3% of sodium chloride led to the conclusion of the high ability of the resulting product to inhibit the corrosion processes

Biofriendly nanocomposite containers with inhibition properties for the protection of metallic surfaces

© 2017 The Author(s) Published by the Royal Society. All rights reserved.An attempt to combine two 'green' compounds in nanocomposite microcontainers in order to increase protection properties of waterborne acryl-styrene copolymer (ASC) coatings has been made. Nlauroylsarcosine (NLS) served as a corrosion inhibitor, and linseed oil (LO) as a carrier-forming component. LO is compatible with this copolymer and can impart to the coating self-healing properties. For the evaluation of the protective performance, three types of coatings were compared. In the first two, NLS was introduced in the coating formulation in the forms of free powder and micro-containers filled with LO, correspondingly. The last one was a standard ASC coating without inhibitor at all. Low-carbon steel substrates were coated by these formulations by spraying and subjected subsequently to the neutral salt spray test according to DIN ISO 9227. Results of these tests as well as the data obtained by electrochemical study suggest that such containers can be used for the improvement of adhesion of ASC-based coatings to the substrate and for the enhancement of their protective performance upon integrity damage, whereas the barrier properties of intact coatings were decreased

Nanostructured dolomite flour for soil liming

© 2019 IOP Publishing Ltd. All rights reserved. The nanostructured dolomite flour is produced by ultrasonic dispersion of dolomite flour. It is a suspension of evenly distributed mineral particles in deionized water. The visualized surface showed that the minerals had particles of various sizes and shapes. The structure of dolomite flour was represented by a conglomerate of 0.25-1.0 μm. The particle size of nanostructured dolomite flour ranged from 40.0-120.0 nm, the average size was 50.04 nm. The highly dispersed crushing of dolomite flour conglomerates contributed to an increase in the contact area of particles and the soil; it accelerated their interaction. Shift pHsalt. by 0.3 units, and an increase in the grain of spring wheat by 2.0% using a nanostructured analogue in doses of 0.1 g. and 0.05 Hr. were comparable at a flow rate of 10 and 20 times less compared with dolomite flour at a dose of 1.0 Hr respectively

Nanostructured dolomite flour for soil liming

© 2019 IOP Publishing Ltd. All rights reserved. The nanostructured dolomite flour is produced by ultrasonic dispersion of dolomite flour. It is a suspension of evenly distributed mineral particles in deionized water. The visualized surface showed that the minerals had particles of various sizes and shapes. The structure of dolomite flour was represented by a conglomerate of 0.25-1.0 μm. The particle size of nanostructured dolomite flour ranged from 40.0-120.0 nm, the average size was 50.04 nm. The highly dispersed crushing of dolomite flour conglomerates contributed to an increase in the contact area of particles and the soil; it accelerated their interaction. Shift pHsalt. by 0.3 units, and an increase in the grain of spring wheat by 2.0% using a nanostructured analogue in doses of 0.1 g. and 0.05 Hr. were comparable at a flow rate of 10 and 20 times less compared with dolomite flour at a dose of 1.0 Hr respectively

Biofriendly nanocomposite containers with inhibition properties for the protection of metallic surfaces

© 2017 The Author(s) Published by the Royal Society. All rights reserved.An attempt to combine two 'green' compounds in nanocomposite microcontainers in order to increase protection properties of waterborne acryl-styrene copolymer (ASC) coatings has been made. Nlauroylsarcosine (NLS) served as a corrosion inhibitor, and linseed oil (LO) as a carrier-forming component. LO is compatible with this copolymer and can impart to the coating self-healing properties. For the evaluation of the protective performance, three types of coatings were compared. In the first two, NLS was introduced in the coating formulation in the forms of free powder and micro-containers filled with LO, correspondingly. The last one was a standard ASC coating without inhibitor at all. Low-carbon steel substrates were coated by these formulations by spraying and subjected subsequently to the neutral salt spray test according to DIN ISO 9227. Results of these tests as well as the data obtained by electrochemical study suggest that such containers can be used for the improvement of adhesion of ASC-based coatings to the substrate and for the enhancement of their protective performance upon integrity damage, whereas the barrier properties of intact coatings were decreased

Biofriendly nanocomposite containers with inhibition properties for the protection of metallic surfaces

© 2017 The Author(s) Published by the Royal Society. All rights reserved.An attempt to combine two 'green' compounds in nanocomposite microcontainers in order to increase protection properties of waterborne acryl-styrene copolymer (ASC) coatings has been made. Nlauroylsarcosine (NLS) served as a corrosion inhibitor, and linseed oil (LO) as a carrier-forming component. LO is compatible with this copolymer and can impart to the coating self-healing properties. For the evaluation of the protective performance, three types of coatings were compared. In the first two, NLS was introduced in the coating formulation in the forms of free powder and micro-containers filled with LO, correspondingly. The last one was a standard ASC coating without inhibitor at all. Low-carbon steel substrates were coated by these formulations by spraying and subjected subsequently to the neutral salt spray test according to DIN ISO 9227. Results of these tests as well as the data obtained by electrochemical study suggest that such containers can be used for the improvement of adhesion of ASC-based coatings to the substrate and for the enhancement of their protective performance upon integrity damage, whereas the barrier properties of intact coatings were decreased

Biofriendly nanocomposite containers with inhibition properties for the protection of metallic surfaces

© 2017 The Author(s) Published by the Royal Society. All rights reserved.An attempt to combine two 'green' compounds in nanocomposite microcontainers in order to increase protection properties of waterborne acryl-styrene copolymer (ASC) coatings has been made. Nlauroylsarcosine (NLS) served as a corrosion inhibitor, and linseed oil (LO) as a carrier-forming component. LO is compatible with this copolymer and can impart to the coating self-healing properties. For the evaluation of the protective performance, three types of coatings were compared. In the first two, NLS was introduced in the coating formulation in the forms of free powder and micro-containers filled with LO, correspondingly. The last one was a standard ASC coating without inhibitor at all. Low-carbon steel substrates were coated by these formulations by spraying and subjected subsequently to the neutral salt spray test according to DIN ISO 9227. Results of these tests as well as the data obtained by electrochemical study suggest that such containers can be used for the improvement of adhesion of ASC-based coatings to the substrate and for the enhancement of their protective performance upon integrity damage, whereas the barrier properties of intact coatings were decreased

Properties of anti-corrosive ferrite pigment synthesized with the use of production waste

© 2018, International Multidisciplinary Scientific Geoconference. All rights reserved. Pigments of the inhibitory type are the active principle of most primers used to protect metals from corrosion. Developers of anticorrosive paint and varnish materials seek to replace chromium-containing pigments, which widely used until recently due to their toxicity, with more environmentally appropriate choices. These include ferrite pigments. It is known, that the most spread method for the synthesis of ferrites, which are complex oxides or salts of ferrous acid, is the joint calcination of iron oxides with oxides having basic properties. The aim of this work is an expansion of the raw material base to produce ferritic pigments by using as one of the initial components an aspiration dust (content of iron oxide exceeds 70 %) formed as a waste in steel-casting plants. Crushed brucite (natural magnesium oxide) was used as the second component. After their thorough mixing, the resulting mixture was calcined at the reaction temperature: MgО + Fe2O3 → MgFe2O4 (1) 6MgО + 4Fe3O4 + О2 → 6MgFe2O4 (2) with obtaining of magnesium ferrite. The course of the reaction was controlled by thermogravimetry and differential thermal analysis. Ferritic-magnetite structure formation was recorded by X-ray diffraction analysis. The variation of the synthesis’s temperature-time conditions made it possible to find the optimal parameters for obtaining ferrite. The synthesized ferrite was ground on a planetary mill. The studying of the painting and technical properties of the grinding product showed that it can be used as a pigment in the production of paints and varnishes. The results of electrochemical studies of steel in contact with the aqueous extract of ferritic pigment containing 3% of sodium chloride led to the conclusion of the high ability of the resulting product to inhibit the corrosion processes

Intraformation Transformation of Heavy Oil by Mixed Fe(II, III) Oxides

© 2018, Springer Science+Business Media, LLC, part of Springer Nature. Iron oxide (magnetite) particles are synthesized. Their effects on the transformation of high-molecular-mass components of Ashal'cha deposit heavy oil after simulating steam-heat action are studied. The contents of resinous asphaltenes are found to decrease if a catalyst is present in the oil. The viscosity decreases during hydrothermal catalytic action. Starting catalyst of mixed Fe(II, III) oxides and catalyst recovered from the oil were analyzed using x-ray structure analyses. Catalyst particle sizes were established using scanning electron microscopy