US4804444A
Expired / Lapsed
US
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Method of producing a both-side electrogalvanized steel strip in a chloride bath
Assignee: JFE Steel Corp
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Filing: 1987-09-30
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Granted: 1989-02-14
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Expires: 2007-09-30
Abstract
Abstract A method of producing both-side electrolytically zinc plated steel strips utilizing a chloride bath including the steps of plating one side of the steel strip in a first plating cell, wetting the thus one-side plated steel strip in a wetting tank, and then plating the other nonplated side of the steel strip in a second plating cell. The method provides for limiting the concentration of zinc in the wetting solution to a range of 0.1-50 g/l so as to improve the zinc coating coverage, glossiness and corrosion resistance.
Inventors
- 👤 Akira Matsuda
- 👤 Hajime Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:48
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/02; C25D5/028; C25D5/34; C25D5/36; C25D5/60; C25D5/615; C25D5/617; C25D5/627
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
In a method of producing a both-side electrolytically zinc plated steel strip utilizing a chloride plating bath, the method including the steps of electrolytically plating one side of the steel strip in a first plating cell, wetting the thus one-side plated steel strip in a wetting tank, and then electrolytically plating the other non-plated side of the steel strip in a second plating cell, the improvement which comprises wetting the one-side plated steel strip in a chloride wetting solution having a concentration of zinc in a range of 0.1 to 50 g/l, so as to produce the both-side electro-galvanized steel strip having improved zinc coating coverage, glossiness and corrosion resistance and utilizes a chloride bath in the first and second plating cells which comprises 150-300 g/l of zinc chloride.
Claim 2
Dependent Claim
129 words
In a method of producing a both-side electrolytically zinc plated steel strip utilizing a chloride plating bath, the method including the steps of electrolytically plating one side of the steel strip in a first plating cell, wetting the thus one-side plated steel strip in a wetting tank, and then electrolytically plating the other non-plated side of the steel strip in a second plating cell, the improvement which comprises wetting the one-side plated steel strip in a chloride wetting solution having a concentration of zinc in a range of 0.1 to 50 g/l, so as to produce the both-side electro-galvanized steel strip having improved zinc coating coverage, glossiness and corrosion resistance and utilizes a chloride bath in the first and second plating cells which comprises 150-300 g/l of zinc chloride.
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) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |