Method of pickling iron or steel objects

Details Method of pickling iron or steel objects Method of pickling iron or steel objects

C - Chemistry, Metallurgy

23

G

149/21, 204/71

C23G 1/08 (2006.01) C23G 1/36 (2006.01)

Patent

CA 1256357

ABSTRACT OF THE DISCLOSURE A method for pickling iron or steel objects before a subsequent surface treatment or mechanical processing. The objects are transported into a pickling bath having a temperature above 250°C and containing a solution of ferrous chloride and a low proportion of free hydrochloric acid. The pickling bath is continuously regenerated in a circulation system with electrolytic cells. These are preferably electrically connected in series and in parallel with the flow of the pickling bath, in order to deposit iron on the cathode and recover free acid.

504493

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