Corrosion resistance of steel coated with different coating systems, containing HAA-polyester powder coating as a top layer

• DOI: 10.5937/str2401043l
• Publication Date: 2025-04-02T16:24:01Z
• Authors: Dragana Lazić; Marko Dimitrijević; Stevan Stupar; Mihael Bučko
• Keywords: Powder coating

This study aimed to assess the impact of surface geometry, preparation, and coating procedures on corrosion behavior HAA-polyester powder coated steel components in a salt spray test. The process parts involved degreasing, Zn coating, an epoxy primer, polyester topcoat. Results highlighted crucial role with flat surfaces showing superior resistance compared welded joints, sharp edges, or hollow cylinders. For standard panels, no red rust was observed for over 600 hours chamber, meeting ISO 12944-6 requirements. However, non-standard panels complex geometries showed much earlier, particularly after 108 zones corners when primer not used. Applying extended by 2-3 times. Hollow cylinders developed 240 due insufficient thickness inside Crevices remained vulnerable, as did reach inner parts. individual before assembly, using brush painting critical areas, such joints corners, are strongly suggested improve protection. Additionally, evaluated coatings exhibited outstanding mechanical strength camouflage capabilities, making them highly suitable military applications.