Title: Metallic descaling system

Abstract: A process for descaling a metallic body, wherein the body is immersed in a first electrolyte, and subsequently, in a second electrolyte. The first electrolyte is an aqueous solution having, by weight, at least 60% potassium hydroxide, at least 5% water and no more than 30% potassium nitrate, and a total amount of potassium hydroxide and potassium nitrate of at least 80%. The second electrolyte is 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.

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Inventors: Zaremski, Donald R. (Cheswick, PA, US)
Krepler, Albert (Vienna, OE)

Application Number: 672585
Filing Date: 1976-04-01
Publication_date: 1977-03-15
Assignee: Allegheny Ludlum Industries, Inc. (Pittsburgh, PA); Ruthner Industrienanlagen Aktiengesellschaft (Vienna, OE)
Primary Class(es): 205/712
Other Classes:
US Patent Ref:

3043758	Jul, 1962	Machu	204/145.
3254011	May, 1966	Zaremski	204/145.
3429792	Feb, 1969	Fukui et al.	204/145.

Other Refs:
Primary Examiner: Tufariello, T. M.
Assistant Examiner:
Attorney: Gioia; Vincent G., Dropkin; Robert F.