Pickling: wash away the surface corrosion of the substrate material and rolling the skin of steel pipe use acid .
In production process of cold drawn semless steel pipe, pickling is an unique process.In order to eliminate diatomite carrier surface adsorption to reduce peak tailing and the need for pickling or alkaline cleaning treatment, the carrier prior to use. Pickling is the carrier 6mol / L hydrochloric acid leaching cook 2h or concentrated hydrochloric acid heated infuser 30min, filtered, washed until neutral, dried. Pickling to remove surface impurities such as iron, aluminum, calcium, magnesium, but can not remove the silanol. The pickling carrier suitable for the analysis of acidic samples.
Generally immersed in the aqueous solution of sulfuric acid and other parts in order to remove the metal surface of the oxide film. Plating, enamel, rolling and other pre-treatment process or intermediate processing.Commonly used in pickling the acid: hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid. Sure to add the pickling acid inhibitor, to prevent acid corrosion on the metal.