Water-based coatings have excellent leveling performance and high density. During the drying process, the coating forms a film and has a more compact structure, making it suitable for castings with high surface smoothness requirements; Meanwhile, water-based coatings have low VOC emissions and minimal harm to human health and the environment, making them more environmentally friendly. Water-based coatings are suitable for assembly line operations with drying conditions and are currently widely used in component casting enterprises in the automotive industry.