Pickling is a process used to remove the oxide scale that forms on the coil surface during steelmaking. The “pickle bath” that the coil runs through is a diluted solution of inorganic acid, usually hydrochloric. This oxide scale must be removed because it is abrasive, decreasing formability and die life in drawing applications. Also, the oxide scale prevents adherence of metallic coatings and paint to the steel surface.
Features of the pickling process line are designed specifically to yield steel strip with excellent surface quality and optimum metallurgical conditioning.