Metal Pickling
Pickling is the removal of oxides from the surface of metals by converting these to soluble compounds. The removal of oxides from the surface of metal strips or sheets is necessary for the further processing if these products.
The majority of pickling processes involve the use of acids (sulphuric, hydrochloric,..) although other methods such as alkaline pickling are also used in special circumstances.
For ferrous metals other than stainless steel hydrochloric acid and sulphuric acid are widely used.
Hydrochloric acid offers some technical advantages over sulphuric acid (faster, cleaner, lower consumption).
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