Descaling metallic article in alkaline and neutral electrolytes

Details Descaling metallic article in alkaline and neutral electrolytes Descaling metallic article in alkaline and neutral electrolytes

C - Chemistry, Metallurgy

25

F

204/85

C25F 1/04 (2006.01)

Patent

CA 1081653

ABSTRACT OF THE DISCLOSURE 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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