Method for pickling or cleaning materials of steel, in...

Details Method for pickling or cleaning materials of steel, in... Method for pickling or cleaning materials of steel, in...

C - Chemistry, Metallurgy

23

G

149/26

C23G 1/08 (2006.01) C23G 1/06 (2006.01)

Patent

CA 2035847

Method for pickling or cleaning materials of steel, in particular stainless steel ABSTRACT Method for pickling or cleaning materials of steel,in particular stainless steel, comprising treating the materials with an aqueous solution containing ferrous ions and ferric ions and an organic acid which does not oxidize the iron in an amount sufficient to maintain the Fe2+ and Fe3+ ions in solution, the ferric and ferrous ions being present in the solution in a ration Fe2+ /Fe3+ between 10/90 and 40/60, and maintaining the ration Fe2+ /Fe3+ within the defined range by addition of hydrogen peroxide. No Figure.

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