This product is an upgraded version based on the traditional phosphating process, using high - quality complexing agents, chelating agents, and rare - earth metals. Basically, no sediment is produced during the use of this product. The treated workpiece has excellent rust - prevention performance and good adhesion, and there is no white ash on the surface of the workpiece. It effectively solves the problems of excessive sediment and difficult solid - waste treatment in traditional phosphating, and is widely used in the surface treatment process of steel to replace the traditional phosphating.