US4160067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten carbonate fuel cell corrosion inhibition
Assignee: Gas Technology Institute
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Filing: 1978-03-13
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Granted: 1979-07-03
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Expires: 1998-03-13
Abstract
Abstract A high temperature molten carbonate fuel cell ferrous metal cell housing having about 2 to about 70 weight percent aluminum content in the cell housing surface wet seal area prior to cell operation providing corrosion inhibition during fuel cell operation.
Inventors
- 👤 Elias H. Camara
- 👤 Leonard G. Marianowski
- 👤 Rafael A. Donado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/02; H01M8/0271; H01M8/14; H01M8/141; H01M8/142; H01M2008/147; H01M2300/00; H01M2300/0017; H01M2300/0048; H01M2300/0051; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
102 words
Ferrous metal cell housing for use in high temperature molten carbonate fuel cells having an anode and a cathode ferrous metal cell housing defining a fuel chamber and an oxidant chamber, respectively, and separated by an electrolyte tile, the peripheral portion of said housings having a wet seal area surface in contact with said electrolyte tile comprising alkali metal carbonates and inert support material and operating at about 500° to about 700° C., said cell housing surface in the wet seal area comprising about 2 to about 70 weight percent aluminum prior to cell operation providing corrosion inhibition during fuel cell operation.
Claim 2
Dependent Claim
102 words
Ferrous metal cell housing for use in high temperature molten carbonate fuel cells having an anode and a cathode ferrous metal cell housing defining a fuel chamber and an oxidant chamber, respectively, and separated by an electrolyte tile, the peripheral portion of said housings having a wet seal area surface in contact with said electrolyte tile comprising alkali metal carbonates and inert support material and operating at about 500° to about 700° C., said cell housing surface in the wet seal area comprising about 2 to about 70 weight percent aluminum prior to cell operation providing corrosion inhibition during fuel cell operation.
Claim 3
Dependent Claim
15 words
The ferrous metal cell housing of claim 1 wherein said housing is an anode housing.
Claim 4
Dependent Claim
36 words
The ferrous metal cell housing of claim 2 wherein said aluminum in the anode wet seal area is provided by metal cladding comprising about 2 to about 6 weight percent aluminum in a ferrous metal alloy.
Claim 5
Dependent Claim
22 words
The ferrous metal cell housing of claim 3 wherein Kanthal cladding is attached to stainless steel alloy base ferrous metal cell housing.
Claim 6
Dependent Claim
34 words
The ferrous metal cell housing of claim 2 wherein said aluminum in the anode wet seal area is provided by surface treatment of said ferrous metal whereby aluminum is diffused into the ferrous metal.
Claim 7
Dependent Claim
27 words
The ferrous metal cell housing of claim 5 wherein aluminum is diffused into stainless steel, said surface treatment providing about 10 to about 70 percent aluminum concentration.
Claim 8
Dependent Claim
20 words
The ferrous metal cell housing of claim 1 providing corrosion inhibition under cell operating conditions of above about 600° C.
Claim 9
Dependent Claim
18 words
The ferrous metal cell housing of claim 7 wherein said cell operating conditions are above about 650° C.
Claim 10
Independent Claim
84 words
A method for inhibiting corrosion of ferrous metal housings defining a fuel chamber and an oxidant chamber separated by an electrolyte tile, the peripheral portion of said housings having a wet seal area surface in contact with an electrolyte tile comprising alkali metal carbonates and an inert support material and operating during fuel cell operation at about 500° to about 700° C., comprising providing in said cell housing surface wet seal area about 2 to about 70 weight percent aluminum prior to cell operation.
Claim 11
Independent Claim
84 words
A method for inhibiting corrosion of ferrous metal housings defining a fuel chamber and an oxidant chamber separated by an electrolyte tile, the peripheral portion of said housings having a wet seal area surface in contact with an electrolyte tile comprising alkali metal carbonates and an inert support material and operating during fuel cell operation at about 500° to about 700° C., comprising providing in said cell housing surface wet seal area about 2 to about 70 weight percent aluminum prior to cell operation.
Claim 12
Dependent Claim
12 words
The method of claim 9 wherein said housing is an anode housing.
Claim 13
Dependent Claim
33 words
The method of claim 10 wherein said aluminum in the anode wet seal area is provided by metal cladding comprising about 2 to about 6 weight percent aluminum in a ferrous metal alloy.
Claim 14
Dependent Claim
19 words
The method of claim 11 wherein Kanthal cladding is attached to stainless steel alloy base ferrous metal cell housing.
Claim 15
Dependent Claim
31 words
The method of claim 10 wherein said aluminum in the anode wet seal area is provided by surface treatment of said ferrous metal whereby aluminum is diffused into the ferrous metal.
Claim 16
Dependent Claim
24 words
The method of claim 13 wherein aluminum is diffused into stainless steel, said surface treatment providing about 10 to about 70 percent aluminum concentration.
Claim 17
Dependent Claim
17 words
The method of claim 9 providing corrosion inhibition under cell operating conditions of above about 600° C.
Claim 18
Dependent Claim
15 words
The method of claim 15 wherein said cell operating conditions are above about 650° C.
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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |