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Patent US3878871A successfully refreshed from Google Patents.
US3878871A
Expired / Lapsed
US
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Corrosion resistant aluminum composite
Assignee: Saliss Aluminium Ltd
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Filing: 1973-11-12
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Granted: 1975-04-22
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Expires: 1993-11-12
Abstract
Abstract A corrosion resistant aluminum composite material is disclosed which comprises a core containing from 0.2 to 0.8% manganese and from 0.05 to 0.5% silicon with the balance being essentially aluminum, and a layer of cladding material metallurgically bonded to at least one surface of the core with the cladding material consisting of from 0.8 to 1.2% manganese, and from 0.1 to 0.4% zinc, with the balance being essentially aluminum. The core material is particularly resistant to pitting corrosion. The composite material possesses a unique combination of corrosion resistance and good mechanical properties and is highly suited for the fabrication of objects for use in aqueous environments.
Inventors
- 👤 William H Anthony
- 👤 James M Popplewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:57
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/06; B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; C22C21/00; F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/084; F28F21/089; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
104 words
A CORROSION RESISTANT ALUMINUM ALLOY COMPOSITE COMPRISING: A. AN ALUMINUM ALLOY CORE CONSISTING ESSENTIALLY OF FROM 0.001 TO 0.3% MAGNESIUM, 0.2 TO 0.8% MANGANESE, 0.001 TO 0.1% CHROMIUM, 0.001 TO 0.2% TITANIUM, 0.05 TP 0.5% SILICON, 0.001 TO 0.2% IRON, 0.001 TO 0.1% COPPER, AND 0.001 TO 0.1% ZINC, BALANCE ALUMINUM;AND B. AN ALUMINUM ALLOY CLADDING, METALLURGICALLY BONDED TO AT LEAST ONE SURFACE OF THE CORE, CONSISTING ESSENTIALLY OF FROM 0.001 TO 0% MAGNESIUM, 0.8 TO 1.2% MANGANESE, 0.001 TO .1% CHROMIUM,.001 TO .1% TITANIUM, 0.001 TO 0.05% SILICON, 0.001 TO 0.05% COPPER, 0.1 TO 0.4% ZINC, AND 0.001 T0 0.1% IRON, BALANCE ALUMINUM.
Claim 2
Dependent Claim
104 words
A CORROSION RESISTANT ALUMINUM ALLOY COMPOSITE COMPRISING: A. AN ALUMINUM ALLOY CORE CONSISTING ESSENTIALLY OF FROM 0.001 TO 0.3% MAGNESIUM, 0.2 TO 0.8% MANGANESE, 0.001 TO 0.1% CHROMIUM, 0.001 TO 0.2% TITANIUM, 0.05 TP 0.5% SILICON, 0.001 TO 0.2% IRON, 0.001 TO 0.1% COPPER, AND 0.001 TO 0.1% ZINC, BALANCE ALUMINUM;AND B. AN ALUMINUM ALLOY CLADDING, METALLURGICALLY BONDED TO AT LEAST ONE SURFACE OF THE CORE, CONSISTING ESSENTIALLY OF FROM 0.001 TO 0% MAGNESIUM, 0.8 TO 1.2% MANGANESE, 0.001 TO .1% CHROMIUM,.001 TO .1% TITANIUM, 0.001 TO 0.05% SILICON, 0.001 TO 0.05% COPPER, 0.1 TO 0.4% ZINC, AND 0.001 T0 0.1% IRON, BALANCE ALUMINUM.
Claim 3
Dependent Claim
106 words
A corrosion resistant aluminum alloy composite comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to 0.2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; and B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core, consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to .1% chromium, .001 to .1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum.
Claim 4
Dependent Claim
106 words
A corrosion resistant aluminum alloy composite comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to 0.2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; and B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core, consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to .1% chromium, .001 to .1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum.
Claim 5
Dependent Claim
45 words
A composite as in claim 1 wherein the core contains from 0.001 to 0.1% magnesium, 0.3 to 0.6% manganese, 0.001 to 0.05% chromium, 0.005 to .15% titanium, 0.15 to 0.25% silicon, 0.001 to 0.08% iron, 0.001 to .05% copper, 0.001 to 0.05% zinc, balance aluminum.
Claim 6
Dependent Claim
45 words
A composite as in claim 1 wherein the cladding contains 0.001 to 0.05% magnesium, 0.9 to 1.1% manganese, 0.02 to 0.05% chromium, 0.005 to 0.03% titanium, 0.001 to 0.03% silicon, 0.001 to 0.01% copper, 0.15 to 0.25% zinc, and 0.001 to 0.08% iron, balance aluminum.
Claim 7
Dependent Claim
17 words
A composite as in claim 1 wherein the cladding has a thickness of 0.001 to 0.100 inches.
Claim 8
Dependent Claim
125 words
A corrosion resistant aluminum alloy composite comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to 0.2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to 0.1% chromium, .001 to .1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum; and C. a layer of Boehmite, having a thickness of fRom 2,000 to 20, 000 A, formed on the cladding.
Claim 9
Dependent Claim
125 words
A corrosion resistant aluminum alloy composite comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to 0.2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to 0.1% chromium, .001 to .1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum; and C. a layer of Boehmite, having a thickness of fRom 2,000 to 20, 000 A, formed on the cladding.
Claim 10
Dependent Claim
45 words
A composite as in claim 5 wherein the core contains from 0.001 to 0.1% magnesium, 0.3 to 0.6% manganese, 0.001 to 0.05% chromium, 0.005 to .15% titanium, 0.15 to 0.25% silicon, 0.001 to 0.08% iron, 0.001 to 0.05% copper, 0.001 to 0.05% zinc, balance aluminum.
Claim 11
Dependent Claim
45 words
A composite as in claim 5 wherein the cladding contains 0.001 to 0.05% magnesium, 0.9 to 1.1% manganese, 0.02 to 0.05% chromium, 0.005 to 0.03% titanium, 0.001 to 0.03% silicon, 0.001 to 0.01% copper, 0.15 to 0.25% zinc, and 0.001 to 0.08% iron, balance aluminum.
Claim 12
Dependent Claim
103 words
A composite tubing comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to .2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; and B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core, consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to 0.1% chromium, 0.001 to 0.1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum.
Claim 13
Dependent Claim
103 words
A composite tubing comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to .2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; and B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core, consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to 0.1% chromium, 0.001 to 0.1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum.
Claim 14
Dependent Claim
46 words
A composite tubing as in claim 8 wherein the core contains from 0.001 to 0.1% magnesium, 0.3 to 0.6% manganese, 0.001 to 0.05% chromium, 0.005 to 0.15% titanium, 0.15 to 0.25% silicon, 0.001 to 0.08% iron, 0.001 to 0.05% copper, 0.001 to 0.05% zinc, balance aluminum.
Claim 15
Dependent Claim
45 words
A composite as in claim 8 wherein the cladding contains 0.001 to 0.05% magnesium, 0.9 to 1.1% manganese, 0.02 to 0.05% chromium, 0.005 to 0.03% titanium, 0.001 to 0.03% silicon, 0.001 to 0.01% copper, 0.15 to 0.25% zinc, and 0.001 to 0.08% iron, balance aluminum.
Claim 16
Dependent Claim
18 words
A composite tubing as in claim 8 wherein the cladding has a thickness of 0.001 to 0.100 inches.
Claim 17
Dependent Claim
122 words
A composite tubing comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to 0.2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core, consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to 0.1% chromium, 0.001 to 0.1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum; and C. a layer of Boehmite, having a thickness of from 2,000 to 20, 000 A, formed on the cladding.
Claim 18
Dependent Claim
122 words
A composite tubing comprising: A. an aluminum alloy core consisting essentially of from 0.001 to 0.3% magnesium, 0.2 to 0.8% manganese, 0.001 to 0.1% chromium, 0.001 to 0.2% titanium, 0.05 to 0.5% silicon, 0.001 to 0.2% iron, 0.001 to 0.1% copper, and 0.001 to 0.1% zinc, balance aluminum; B. an aluminum alloy cladding, metallurgically bonded to at least one surface of the core, consisting essentially of from 0.001 to 0.1% magnesium, 0.8 to 1.2% manganese, 0.001 to 0.1% chromium, 0.001 to 0.1% titanium, 0.001 to 0.05% silicon, 0.001 to 0.05% copper, 0.1 to 0.4% zinc, and 0.001 to 0.1% iron, balance aluminum; and C. a layer of Boehmite, having a thickness of from 2,000 to 20, 000 A, formed on the cladding.
Claim 19
Dependent Claim
47 words
A composite tubing as in claim 12 wherein the core contains from 0.001 to 0.1% magnesium, 0.3 to 0.6% manganese, 0.001 to 0.05% chromium, 0.005 to 0.15% titanium, 0.15 to 0.25% silicon, 0.001 to 0.08% iron, 0.001 to 0.05% copper, and 0.001 to 0.05% zinc, balance aluminum.
Claim 20
Dependent Claim
46 words
A composite tubing as in claim 12 wherein the cladding contains 0.001 to 0.05% magnesium, 0.9 to 1.1% manganese, 0.02 to 0.05% chromium, 0.005 to 0.03% titanium, 0.001 to 0.03% silicon, 0.001 to 0.01% copper, 0.15 to 0.25% zinc, and 0.001 to 0.08% iron, balance aluminum.
References Cited (Backward Citations)
US3312535A
Cited
US3496620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |