US3962501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating of corrosion-resistant molten alloy
Assignee: Nippon Steel Corp
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Filing: 1975-04-29
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Granted: 1976-06-08
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Expires: 1995-04-29
Abstract
Abstract Coating of steel articles with zinc-tin alloys by hot-galvanizing with addition of aluminum to improve the applicability and adhesion of the coating as well as the corrosion resistance, coated surface appearance and formabilities thereof.
Inventors
- 👤 Misao Ohbu
- 👤 Seijun Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:30
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/08; C23C2/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
A method of coating a steel substrate with a corrosion resistant alloy, comprising immersing said steel substrate in an alloy bath, said bath being at a temperature in the range from 20° to 150°C above the melting point of said alloy and containing 75 to 5% by weight zinc, 25 to 95% by weight tin and 0.005 to 25% by weight of aluminum, based on the total bath composition.
Claim 2
Independent Claim
69 words
A method of coating a steel substrate with a corrosion resistant alloy, comprising immersing said steel substrate in an alloy bath, said bath being at a temperature in the range from 20° to 150°C above the melting point of said alloy and containing 75 to 5% by weight zinc, 25 to 95% by weight tin and 0.005 to 25% by weight of aluminum, based on the total bath composition.
Claim 3
Dependent Claim
26 words
A method according to claim 1, in which the molten bath contains 0.005 - 0.3% by weight of aluminum, and the material is pretreated with flux.
Claim 4
Dependent Claim
37 words
A method according to claim 1, in which the molten bath contains 40 - 60% by weight of tin and 0.30 - 25.0% by weight of aluminum and the material is cleaned and activated by reducing gas.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein said alloy bath is at a temperature in the range from 30° to 100°C above the melting point of said alloy.
Claim 6
Independent Claim
71 words
A method of coating a steel substrate with a corrosion resistant alloy, consisting essentially of immersing said steel substrate in an alloy bath, said bath being at a temperature in the range from 20° to 150° above the melting point of said alloy, and containing 90 to 5% by weight zinc, 10% to 95% by weight tin and 0.3 to 25% by weight of aluminum, based on the total bath composition.
Claim 7
Independent Claim
71 words
A method of coating a steel substrate with a corrosion resistant alloy, consisting essentially of immersing said steel substrate in an alloy bath, said bath being at a temperature in the range from 20° to 150° above the melting point of said alloy, and containing 90 to 5% by weight zinc, 10% to 95% by weight tin and 0.3 to 25% by weight of aluminum, based on the total bath composition.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |