Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Preliminary cleaning or shaping of workpiece
Patent
1996-09-13
1998-09-08
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Preliminary cleaning or shaping of workpiece
205709, 205710, 204209, 204211, C25F 106, C25F 700
Patent
active
058040560
ABSTRACT:
A process and apparatus for the continuous treatment of annealed and non-annealed hot strip of stainless steel. First, the hot strip is stretched, bent and straightened to break a scale which has grown on the hot strip. Then, a electrolytic pickling is performed in an electrolyte with multiple alternating anodically-connected and cathodically-connected strip polarization. Directly following thereafter, pickling once again takes place in the electrolyte with multiple anodically-connected electrodes arranged directly behind one another and corresponding cathodic strip polarization, followed by anodic strip polarization produced by means of a cathodically-connected electrode. To further remove any scale remaining on the surface of the hot strip, the hot strip is subject to high-pressure fluid spraying or brush aggregates. Renewed electrolytic pickling in performed with at least one electrolyte with multiple exclusively cathodically-connected electrodes and anodic strip polarization. Finally, post-treatments are performed such as washing, brushing, post-washing and drying of the strip surface.
REFERENCES:
patent: 3338809 (1967-08-01), Stricker
patent: 5022971 (1991-06-01), Maresch et al.
patent: 5382335 (1995-01-01), Jirenec et al.
patent: 5472579 (1995-12-01), Maruchi et al.
Edel Horst
Flugge Jurgen
Haentjes Michael
Jaenichen Andreas
Kilb Rainer
Mannesmann Aktiengesellschaft
Valentine Donald R.
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