US4150179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot dip aluminizing of steel strip
Assignee: Coated Metals Ltd
•
Filing: 1977-12-19
•
Granted: 1979-04-17
•
Expires: 1997-12-19
Abstract
Abstract This invention relates to a method and means for applying one or more coatings on to a substrate. The invention is particularly, but not exclusively, concerned with applying metal or alloy coatings on to metallic substrates in order to improve the formability and corrosion resistance of the substrates. Known coating processes include hot dip galvanizing, tinning and aluminizing, and in particular the method comprises feeding the substrate through a molten composition of a first coating material and subsequently feeding the so coated substrate into a molten composition of a second coating material whereby the coating of the second material is overlaid upon the coating of the first material.
Inventors
- 👤 Robert D. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:35
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12764
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A method of coating a steel substrate comprising the steps of: floating a first composition comprising aluminum/silicon alloy containing between 5 and 12 wt.% silicon on a bath of molten material; floating a second composition comprising aluminum on said bath of molten material, said molten material being inert relative to said first and second compositions; separating said first and second compositions on said bath of molten material; and feeding the substrate sequentially through said first composition, then directly through said molten material and then directly through said second composition; whereby the coating of the second composition is overlaid upon the coating of the first composition on said substrate.
Claim 2
Independent Claim
108 words
A method of coating a steel substrate comprising the steps of: floating a first composition comprising aluminum/silicon alloy containing between 5 and 12 wt.% silicon on a bath of molten material; floating a second composition comprising aluminum on said bath of molten material, said molten material being inert relative to said first and second compositions; separating said first and second compositions on said bath of molten material; and feeding the substrate sequentially through said first composition, then directly through said molten material and then directly through said second composition; whereby the coating of the second composition is overlaid upon the coating of the first composition on said substrate.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein coating is carried out at a temperature within the range 600-800° C.
Claim 4
Dependent Claim
37 words
A method according to claim 1 wherein the coating of the first composition has a thickness of between 6 and 8 μm and the coating of the second composition has a thickness of up to 10 μm.
Claim 5
Dependent Claim
22 words
A method according to claim 3 wherein the coating of the second composition has a thickness of between 8 and 10 μm.
References Cited (Backward Citations)
US1741388A
Cited
US2135388A
Cited
US2111826A
Cited
US2276232A
Cited
US2406245A
Cited
US2937435A
Cited
US3383189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |