US4056657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc-aluminum eutectic alloy coated ferrous strip
Assignee: Inland Steel Co
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Filing: 1976-06-10
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Granted: 1977-11-01
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Expires: 1996-06-10
Abstract
Abstract A ferrous metal strip having a continuous hot-dip coating consisting essentially of the zinc-5% aluminum eutectic alloy which contains as the only metallic additive a metal which reduces the surface tension of the coated bath, such as lead, antimony or tin, with the total amount of the metallic additives being a maximum of about 0.1 wt. %, and said coating being formable and exhibiting good corrosion resistance when exposed to marine-type environments and having a bright, smooth surface free of ripples and spangles which interfere with paintability and weldability.
Inventors
- 👤 Harry P. Leckie
- 👤 William C. Sievert
- 👤 Robert A. Legault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:50
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A corrosion resistant continuous hot-dip coated ferrous metal strip having applied directly on a surface thereof a hot-dip coating consisting essentially of: 1. zinc-aluminum eutectic alloy which contains 5.0 ± 0.5 wt. % aluminum, and 2. at least one metallic additive effective for lowering the surface tension of the coating selected from the group of metals consisting of lead, antimony, and tin with the total amount of said mtallic additives present in said coating being a maximum of about 0.1 wt. %, with the balance essentially zinc; and said coating being characterized by a bright, smooth surface which is free of both ripples and spangles which interfere with the paintability and weldability of the strip and said coated strip being formable and resistant to corrosion due to exposure to a marine-type environment.
Claim 2
Dependent Claim
132 words
A corrosion resistant continuous hot-dip coated ferrous metal strip having applied directly on a surface thereof a hot-dip coating consisting essentially of: 1. zinc-aluminum eutectic alloy which contains 5.0 ± 0.5 wt. % aluminum, and 2. at least one metallic additive effective for lowering the surface tension of the coating selected from the group of metals consisting of lead, antimony, and tin with the total amount of said mtallic additives present in said coating being a maximum of about 0.1 wt. %, with the balance essentially zinc; and said coating being characterized by a bright, smooth surface which is free of both ripples and spangles which interfere with the paintability and weldability of the strip and said coated strip being formable and resistant to corrosion due to exposure to a marine-type environment.
Claim 3
Dependent Claim
29 words
A corrosion resistant continuous hot-dip coated ferrous metal strip as in claim 1, wherein said coating contains a total of about 0.1 wt. % of the said metallic additives.
Claim 4
Dependent Claim
17 words
A corrosion resistant continuous hot-dip coating as in claim 2, wherein the said metallic additive is lead.
Claim 5
Dependent Claim
17 words
A corrosion resistant continuous hot-dip coating as in claim 2, wherein the said metallic additive is antimony.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |