Anticorrosion properties of pigments based on ferrite coated zinc particles

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Abstract

The paper deals with a new anticorrosion pigment, synthesized on a core-shell basis. For its syntheses a starting substance is used that forms the lamellar shaped core; namely lamellar zinc. The cover of the core is represented by zinc oxide, which is in fact partly oxidized lamellar zinc core, and is created during the calcination of the pigment. The compound that forms the top layer of the core, a ferrite, is also formed during calcination. The formula for the prepared pigment is then defined as MexZn1-xFe 2O4/Zn and the formula of thin ferrite layer is Me xZn1-xFe2O4 (where Me = Ca, Mg). Due to its shape, this anticorrosion pigment includes another anticorrosion effect, the so called "barrier effect". The mechanisms of anticorrosion effect, corrosion efficiency and mechanical properties were investigated for epoxy-ester paint systems with 10%pigment volume concentration (PVC). Mechanical tests were performed to determine the adhesiveness and mechanical resistance of paints and accelerated corrosion tests were carried out to evaluate efficiency against chemical degradation factors. © 2013 The Authors.

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Benda, P., & Kalendová, A. (2013). Anticorrosion properties of pigments based on ferrite coated zinc particles. In Physics Procedia (Vol. 44, pp. 185–194). Elsevier B.V. https://doi.org/10.1016/j.phpro.2013.04.023

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