A novel approach to the synthesis of a non‐toxic, platy pigment for anticorrosive paints

Abstract

Purpose

To develop a method for the preparation of micaceous zinc ferrite (MZF), anticorrosive pigment having desirable chemical and physical properties.

Design/methodology/approach

MZF pigment was prepared after firing the oxidised solid molten salts without washing. The MZF pigment obtained was characterised using X‐ray diffraction analysis, crystal size analysis, scanning electron microscope and energy dispersive X‐ray analysis. The pigment obtained was also evaluated chemically with respect to moisture content, content of water‐soluble salts, hydrogen ion concentration (pH) and weight loss; and physically with respect to particle shape, colour, specific gravity and oil absorption. Commercially available micaceous iron oxide and zinc ferrite pigments were also characterised in comparison.

Findings

A spinel, MZF pigment was prepared using relevant oxidised solid molten salts. The preparation produced a lamellar structure with a basic nature giving not only barrier protection but also chemical passivation of the substrate.

Research limitations/implications

The anticorrosive properties of the pigments obtained could be evaluated using more conventional methods such as salt‐spray test.

Practical implications

The pigment prepared could be used as a highly efficient pigment for anticorrosion coating for steel.

Originality/value

The method for the preparation of MZF pigment was novel. The pigment obtained could be used in various resin systems to produce anticorrosive paints for steel protection.

Citation

Emira, H.S. (2005), "A novel approach to the synthesis of a non‐toxic, platy pigment for anticorrosive paints", Pigment & Resin Technology, Vol. 34 No. 3, pp. 132-138. https://doi.org/10.1108/03699420510597974