According to Baidu Encyclopedia, the purpose of washing after degreasing is to wash off the degreasing residue in the cleaning system. Spray the degreasing liquid from the cleaning system with desalted water or clear water, and then wash it alternately with water.

Degreasing is essentially to remove the grease on the surface of strip steel through saponification and emulsification. Electrolytic degreasing is to use strip steel as cathode or anode, and use the strong emulsification of a large number of bubbles generated on the surface of strip steel to strengthen the degreasing process.