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US 4,066,521 AGranted
Metallic descaling system
AssigneeAllegheny Ludlum Industries, Inc.
InventorsDonald R. Zaremski, Albert Krepler
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Abstract
A process for descaling a metallic body, wherein a heated body is immersed in a bath of a molten oxidizing salt, and subsequently in an electrolyte of an aqueous solution of at least one neutral salt from the group consisting of the chloride, sulfate and nitrate of an alkali metal or ammonium.
Claims5
A process for descaling a heated metallic body, which comprises the steps of:
- immersing said body in a bath of molten oxidizing salt;
- maintaining said bath at a temperature above its melting point during said immersion, said immersion being for a period of more than 2 and less than 30 seconds;
- removing said body from said bath after scale on said body has been conditioned for subsequent removal;
- subsequently immersing said body in an electrolyte of an aqueous solution of at least one neutral salt from the group consisting of the chloride, sulfate and nitrate of an alkali metal or ammonium;
- passing an electric current through said body and electrolyte for a period of at least 4 seconds;
- and removing said body from said electrolyte.
3 more elements
Dependencies are inferred from the claim text.