Preparation and properties of PA11 powder coating on metal using the fluidized bed method

Abstract

In recent years, plastic powder coating using the fluidized bed method has gained a great deal of attention due to its excellent performance and environmental friendliness. It has been widely used in the field of metal coating, especially in the protective film for metal-based products. In this study, we present the preparation and properties of PA11 coating layers on steel manufactured by the fluidized bed method at different preheat temperatures (220, 250, 3500C) and dipping times (420s). The results showed that coating thickness increases with dipping time. A high speed of polymer deposition was observed occurred in the first few seconds of the coating process and reached a maximum coating thickness. The results also showed the coating thickness increased in accordance with the pre-heat temperature. The surface of coated specimen (preheated at 2500C) with different airflow rates was evaluated by the roughness measurement. The anticorrosion of the PA11 coatings at the dipping times of 5-15 seconds was examined using the salt spray test.