Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Internal battery action
Patent
1996-07-17
1998-07-14
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Internal battery action
205662, 205672, 205674, 205717, C25F 306, C25F 500
Patent
active
057798788
ABSTRACT:
A process for removing zinc from galvanized steel. The galvanized steel is immersed in an electrolyte containing at least about 15% by weight of sodium or potassium hydroxide and having a temperature of at least about 75.degree. C. and the zinc is galvanically corroded from the surface of the galvanized steel. The material serving as the cathode is principally a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series. The corrosion rate may be accelerated by (i) increasing the number density of corrosion sites in the galvanized steel by mechanically abrading or deforming the galvanized steel, (ii) heating the galvanized steel to form an alloy of zinc on the surface of the galvanized steel, (iii) mixing the galvanized steel with a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series, or (iv) moving the galvanized steel relative to itself and to the electrolyte while immersed in the electrolyte.
REFERENCES:
patent: 2973307 (1961-02-01), Hahn
patent: 3492210 (1970-01-01), Bowers et al.
patent: 3905882 (1975-09-01), Hudson et al.
patent: 4172773 (1979-10-01), Pellegri et al.
patent: 4710277 (1987-12-01), Dyvik et al.
patent: 5106467 (1992-04-01), Leeker et al.
patent: 5302260 (1994-04-01), LeRoy et al.
patent: 5302261 (1994-04-01), LeRoy et al.
patent: 5407544 (1995-04-01), Oehr et al.
Daniels Edward J.
Dudek Frederick J.
Morgan William A.
Metal Recovery Industries (US) Inc.
Valentine Donald R.
LandOfFree
Process for dezincing galvanized steel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for dezincing galvanized steel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for dezincing galvanized steel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1878351