THE INFLUENCE OF SURFACE PRETREATMENT ON COATING ADHESION IN CATAPHORETIC PAINTING OF ALUMINUM PARTS

Jozef DOBRÁNSKY, Miroslav GOMBÁR, Peter MICHALÍK, Marek KOČIŠKO, Martin POLLÁK, Adrián VODILKA

Abstract


This study examines the impact of surface pretreatment on coating adhesion during cataphoretic painting of aluminum parts. Different degreasing agents were applied to aluminum test samples under varying experimental conditions determined through a planned design. Following the pretreatment stage, the samples were coated using cataphoretic deposition technology. Adhesion performance was evaluated by means of the grid-cut test in accordance with ISO 2409:2020. The experimental results revealed that the average coating thickness exerted the most significant influence on the adhesion of the cataphoretic coating.

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