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The properties of ZnFe 2 O 4 as an anticorrosion pigment dependent upon the structure of initial Fe 2 O 3

The properties of ZnFe 2 O 4 as an anticorrosion pigment dependent upon the structure of initial... Purpose – The purpose of this paper is to synthesize anticorrosion pigments ZnFe 2 O 4 from diverse raw materials of various shapes and size of primary particles. Design/methodology/approach – Anticorrosion pigments were synthesized through a high‐temperature process during a solid phase. Zinc ferrites were prepared from hematite ( α ‐Fe 2 O 3 ), goethite ( α ‐FeO.OH), magnetite (Fe 3 O 4 ), and specularite (Fe 2 O 3 ) entering into reaction with zinc oxide at temperatures ranging from 600 up to 1,100°C. The nature of the initial raw material, primarily the shape of its particles, affects the shape of the particles of the synthesized zinc ferrite. The formulated zinc ferrites had a rod‐shape, lamellar, and/or isometric shape. The shape of the particles of synthesized zinc ferrites was studied with regard to its effects on the mechanical and corrosion resistance of organic coatings. The obtained pigments were characterized by means of X‐ray diffraction analysis and scanning electron microscopy. The synthesized anticorrosion pigments were used to prepare epoxy coatings and water‐borne styrene‐acrylate coatings that were subjected to post‐application tests for physical‐mechanical properties and anticorrosion properties. Findings – The shape of the particles was identified in the synthesized pigments. X‐ray diffraction analysis revealed the degree of precipitation and lattice parameters. All of the synthesized pigments had good anticorrosion efficiency in an epoxy and in styrene‐acrylate coatings. Compared with a commercially used anticorrosion pigment, their protective power in coatings was demonstrably stronger. Practical implications – The synthesized pigments can be used conveniently in coatings protecting metal bases against corrosion. Originality/value – The synthesis of zinc ferrites with different particle shapes for applications in anticorrosion coatings provides a new way of protecting metals against corrosion. Of benefit is the fact that the synthesized pigments do not contain any environmentally harmful substances. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

The properties of ZnFe 2 O 4 as an anticorrosion pigment dependent upon the structure of initial Fe 2 O 3

Anti-Corrosion Methods and Materials , Volume 55 (4): 16 – Jun 27, 2008

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Publisher
Emerald Publishing
Copyright
Copyright © 2008 Emerald Group Publishing Limited. All rights reserved.
ISSN
0003-5599
DOI
10.1108/00035590810887673
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to synthesize anticorrosion pigments ZnFe 2 O 4 from diverse raw materials of various shapes and size of primary particles. Design/methodology/approach – Anticorrosion pigments were synthesized through a high‐temperature process during a solid phase. Zinc ferrites were prepared from hematite ( α ‐Fe 2 O 3 ), goethite ( α ‐FeO.OH), magnetite (Fe 3 O 4 ), and specularite (Fe 2 O 3 ) entering into reaction with zinc oxide at temperatures ranging from 600 up to 1,100°C. The nature of the initial raw material, primarily the shape of its particles, affects the shape of the particles of the synthesized zinc ferrite. The formulated zinc ferrites had a rod‐shape, lamellar, and/or isometric shape. The shape of the particles of synthesized zinc ferrites was studied with regard to its effects on the mechanical and corrosion resistance of organic coatings. The obtained pigments were characterized by means of X‐ray diffraction analysis and scanning electron microscopy. The synthesized anticorrosion pigments were used to prepare epoxy coatings and water‐borne styrene‐acrylate coatings that were subjected to post‐application tests for physical‐mechanical properties and anticorrosion properties. Findings – The shape of the particles was identified in the synthesized pigments. X‐ray diffraction analysis revealed the degree of precipitation and lattice parameters. All of the synthesized pigments had good anticorrosion efficiency in an epoxy and in styrene‐acrylate coatings. Compared with a commercially used anticorrosion pigment, their protective power in coatings was demonstrably stronger. Practical implications – The synthesized pigments can be used conveniently in coatings protecting metal bases against corrosion. Originality/value – The synthesis of zinc ferrites with different particle shapes for applications in anticorrosion coatings provides a new way of protecting metals against corrosion. Of benefit is the fact that the synthesized pigments do not contain any environmentally harmful substances.

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: Jun 27, 2008

Keywords: Pigments; Coatings; Corrosion protection; Zinc; Paints

References