Patent US4469565A successfully refreshed from Google Patents.
US4469565A
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Process of continuously electrodepositing on strip metal on one or both sides
Assignee: ANDRITZ-RUTHNER INDUSTRIEANLAGEN AG A-1121 VIENNA AICHHOLZGASSE 51-53 AUSTRIA
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Filing: 1983-08-04
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Granted: 1984-09-04
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Expires: 2003-08-04
Abstract
Abstract In a process of continuously electrodepositing a metal layer on one or both sides of strip metal which moved while it is maintained in a non-horizontal direction, the electrolyte flows between at least one platelike anode and the strip metal which constitutes a cathode. The electrode flows downwardly by gravity and in the space between the anode and the strip metal forms a coherent body of flowing liquid. Additional electrolyte is continuously supplied to said space.
Inventors
- 👤 Josef Hampel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:44
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D5/12; C25D7/00; C25D7/06; C25D7/0614
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
A process of continuously electrodepositing a metal layer on at least one side of a strip metal which is moved while it is maintained in a non-horizontal orientation, comprising the steps of causing an electrolyte to flow between at least one platelike anode and the strip metal, which constitutes a cathode, permitting the electrode to enter freely adjacent to the upper portion of said anode to flow downwardly by gravity so that the electrolyte constitutes a coherent body of flowing liquid in the space between the anode and the strip metal and in contact with said strip metal, and continuously supplying additional electrolyte to said space to maintain said space filled with electrolyte.
Claim 2
Dependent Claim
113 words
A process of continuously electrodepositing a metal layer on at least one side of a strip metal which is moved while it is maintained in a non-horizontal orientation, comprising the steps of causing an electrolyte to flow between at least one platelike anode and the strip metal, which constitutes a cathode, permitting the electrode to enter freely adjacent to the upper portion of said anode to flow downwardly by gravity so that the electrolyte constitutes a coherent body of flowing liquid in the space between the anode and the strip metal and in contact with said strip metal, and continuously supplying additional electrolyte to said space to maintain said space filled with electrolyte.
Claim 3
Dependent Claim
37 words
A process as set forth in claim 1, wherein the angle between the strip metal and the vertical is up to 30° and the distance between the anode and the strip metal is 2 to 20 mm.
Claim 4
Dependent Claim
31 words
A process as set forth in claim 1, wherein there is no increase of the distance between the anode and the strip metal in the direction of flow of the electrolyte.
Claim 5
Dependent Claim
57 words
A process as set forth in claim 3, wherein the distance between the strip metal and the anode decreases downwardly in accordance with the equation d=k√Vs, wherein d is the distance between the strip metal and the anode, s is the length of the path for the downward flow of the electrolyte, and k is a constant.
Claim 6
Dependent Claim
33 words
A process according to claim 1, characterized in that electrodes are provided on both sides of the strip metal and the polarity of and the voltage applied to said electrodes are separately selected.
Claim 7
Dependent Claim
109 words
A process according to claim 1, characterized in that for electrodepositing a zinc-nickel alloy on a steel strip the relation of the direction of movement of the steel strip to the direction of flow of the electrolyte is reversed at least once, the electrodeposition is effected with a current density of 20 to 150 amperes per square decimeter by means of an electrolyte, which consists of an aqueous solution at 40° to 70° C. and contains at least 80 g/l NiSO 4 .7H 2 O, 150 g/l ZnSO 4 .7H 2 O and 2 g/l H 3 BO 3 in concentrations up to their respective solubilities in said solution.
Claim 8
Dependent Claim
38 words
A process according to claim 1, characterized in that a nickel-zinc ratio between 4:10 and 10:10 is maintained in said electrolyte to deposit a layer which contains 8 to 15 wt.% nickel, preferably 9 to 13 wt.% nickel.
Claim 9
Dependent Claim
27 words
A process according to claim 1, characterized in that a pH value of 1 to 2 is maintained in the bath by small additions of sulfuric acid.
Claim 10
Dependent Claim
39 words
A process according to claim 1, characterized in that at least part of the additional electrolyte supplied to the space between the anode and the strip metal is caused to enter said space through openings extending through the anode.
Claim 11
Dependent Claim
44 words
A process as set forth in claim 1, wherein at least two superimposed anodes are provided adjacent to the strip metal and the electrolyte entering an upper anode is collected under said anode and then permitted to flow freely into the next lower anode.
Claim 12
Dependent Claim
48 words
A process as set forth in claim 1, characterized in that the lower deflecting roller and at least a part of the electrodes are arranged in an open-topped cell, from which a pump conducts up the electrolyte to the anode through passages being out of the cell casing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |