Multi-Perspective Evaluations of Laser-Removal Quality of Acrylic Polyurethane Coatings on Aluminum Alloy Substrate

Evaluation systems for objects after laser removal have not been systematically established, yet they great significance repairing engineering coating materials. In general, this paper mainly focused on the surface quality removal, which was simulated by thermal models and characterized microscopic, residual chemical compositions, wettability. The threshold considered to be a key indicator regulate precision. Here, model used explore 15 J/cm2, ablation P 308 W at 100 kHz. Besides, structure observed through simulation before experiments. It also predicted effect of power overlapping roughness, therefore provided theoretical reference Then, two groups samples were set up acrylic polyurethane coatings 2024 aluminum alloy with without anodizing treatment, respectively. After removed, microscopic morphologies demonstrated wavy undulation little residue. Meanwhile, increments roughness less than 0.5 μm surfaces nice Evaluating from above aspects is meaningful helpful non-destructive cleaning aircraft skin coatings.