US3998779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating method and composition for the sacrificial protection of metal substrates
Assignee: Chromalloy American Corp
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Filing: 1975-02-13
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Granted: 1976-12-21
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Expires: 1995-02-13
Abstract
Abstract A coating method and coating composition are provided for the sacrificial protection of metal substrates, e.g. magnesium and magnesium alloys, wherein the coating bonded to the metal substrate comprises a non-metallic adhesive material, such as an epoxy resin, having dispersed therethrough a powdered alloy composition which is electropositive to the metal substrate, said coating composition being electrically conductive relative to said metal substrate.
Inventors
- 👤 Robert B. Baer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:54
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/30; C09; C09D; C09D5/00; C09D5/24; C23; C23F; C23F13/00; C23F13/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A composite sacrificial coating material for protecting a metal substrate against corrosion which comprises a bondable curable non-metallic adhesive material having uniformly dispersed therethrough from about 10% to 50% by weight of a powdered alloy composition, said alloy composition ranging by weight from about 5% to 60% of a metal selected from the group consisting of strontium, barium and calcium, 0% to about 20% aluminum and the balance substantially magnesium ranging from about 40% to 95%, said coating material being electrically conductive relative to the metal substrate.
Claim 2
Dependent Claim
87 words
A composite sacrificial coating material for protecting a metal substrate against corrosion which comprises a bondable curable non-metallic adhesive material having uniformly dispersed therethrough from about 10% to 50% by weight of a powdered alloy composition, said alloy composition ranging by weight from about 5% to 60% of a metal selected from the group consisting of strontium, barium and calcium, 0% to about 20% aluminum and the balance substantially magnesium ranging from about 40% to 95%, said coating material being electrically conductive relative to the metal substrate.
Claim 3
Dependent Claim
27 words
The composite sacrificial coating material of claim 1, wherein the non-metallic, adhesive material is selected from the group consisting of alkali metal silicates and curable plastic adhesive.
Claim 4
Dependent Claim
19 words
The composite sacrificial coating material of claim 2, wherein the non-metallic curable plastic adhesive is a curable epoxy resin.
References Cited (Backward Citations)
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US3276893A
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US3562124A
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US3620876A
Cited
US3716609A
Cited
US3748292A
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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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |