Steel pickling

Steel pickling means the chemical removal of iron oxide mill scale that is formed on steel surfaces during hot rolling or hot forming of semi-finished steel products through contact with an aqueous solution of acid where such contact occurs prior to shaping or coating of the finished steel product. This definition does not include removal of light rust or scale from finished steel products or activation of the metal surface prior to plating or coating.


40 CFR § 63.1156

Scoping language

Terms used in this subpart are defined in the Clean Air Act, in subpart A of this part, or in this section as follows:

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