Pigments with Ti4 + −Zn2 + , Ca2 + , Sr2 + , Mg2 + ‐based on mixed metal oxides with spinel and perovskite structures for organic coatings
Abstract
Purpose
The purpose of this paper is to synthesise X2TiO4 spinel‐type anticorrosion pigments and YTiO3, perovskite‐type anticorrosion pigments, where X = Zn, Mg, Ca, Sr; Y = Ca for metal protective paints.
Design/methodology/approach
Anticorrosion pigments were synthesised from oxides or carbonates at high temperature. The following pigments were synthesised: TiO2 · ZnO, 2TiO2 · ZnO, TiO2 · 2ZnO, TiO2 · MgO, TiO2 · CaO, TiO2 · ZnO · MgO, and TiO2 · ZnO · SrO. The pigments obtained were characterised by means of X‐ray diffraction analysis, measurement of particle sizes and scanning electron microscopy. The anticorrosion pigments synthesised were used to produce epoxy coatings with PVC = 10 per cent for each synthesised pigment. The coatings were tested for physical‐mechanical properties and in corrosion atmospheres. The corrosion test results were compared with those of alumino zinc phosphomolybdate.
Findings
A spinel or perovskite structure was found in the pigments synthesised. High anticorrosion efficiency was identified in all the synthesised pigments, the highest efficiency being demonstrated in the TiO2 · ZnO pigment of spinel structure and in the TiO2 · CaO pigment of perovskite structure.
Practical implications
The pigments synthesised can be conveniently used to protect metal bases from corrosion.
Originality/value
The use of pigments synthesised in anticorrosion coatings for metal protection presents a new approach. Its benefits are the use and the method of synthesising the anticorrosion pigments that do not contain heavy metals and that are acceptable for the environment.
Keywords
Citation
Kalendová, A., Veselý, D. and Kalenda, P. (2007), "Pigments with Ti4 + −Zn2 + , Ca2 + , Sr2 + , Mg2 + ‐based on mixed metal oxides with spinel and perovskite structures for organic coatings", Pigment & Resin Technology, Vol. 36 No. 1, pp. 3-17. https://doi.org/10.1108/03699420710718715
Publisher
:Emerald Group Publishing Limited
Copyright © 2007, Emerald Group Publishing Limited