Inhibitory properties of an ion-exchange anti-corrosion pigment based on the natural montmorillonite for paint coatings

Keywords

ion-exchange minerals, bentonite, montmorillonite, anti-corrosion pigment, inhibition efficiency, aluminium alloy, electrochemical impedance spectroscopy.

Cite as

Danyliak M.-O. M. and Korniy S. A. Inhibitory properties of an ion-exchange anti-corrosion pigment based on the natural montmorillonite for paint coatings. Physico-chemical Mechanics of Materials. 2024. 60(3), 083-091.

https://doi.org/10.15407/pcmm2024.03.083

Abstract

Environment-friendly anti-corrosion pigments for paint coatings based on the natural montmorillonite mineral modified with zinc cations were obtained by the liquid phase ion exchange method. It was established by the methods of potentiodynamic polarization and electrochemical impedance spectroscopy that the corrosion resistance of aluminium alloy increases in the acid rain environment with obtained pigment. The surface morpho­logy of the D16T aluminium alloy after immersion in inhibited environments and the pro­tective mecha­nism of modified montmorillonite in acid rain were studied using scanning electron micro­scopy. It was established that the protection degree in such an environment with Zn-mont­mo­rillonite for aluminium alloy is above 90%. The obtained modified mont­moril­lo­nite can be a promising anti-corrosion pigment for protective paint coatings.

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