US3617345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing aluminum coated ferrous base articles
Assignee: Alcoa Corp
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Filing: 1969-10-30
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Granted: 1971-11-02
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Expires: 1989-10-30
Abstract
Abstract A process for coating a ferrous metal article with aluminum including cleaning the ferrous article, applying to the surface of the ferrous article a flux of about 0.125 to 4% aqueous solution of an organic aromatic carboxylic acid having one carboxyl group and a phenolic hydroxyl group, drying the ferrous article and subsequently applying molten aluminum to the ferrous article. The coating process wherein the acid is salicylic acid or 5-chlorosalicylic acid employed in concentrations of about 1 to 4%. Applying the flux to the ferrous metal article surface by immersion of the article in a flux bath having a temperature of about 100 to 212* F. for a period of about 1 to 2 minutes.
Inventors
- 👤 Melvin H Brown
- 👤 Maurice W Wei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; C23C2/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
The process of claim 1 including after cleaning said ferrous article rinsing said article with water, applying said flux through immersion of said ferrous article in a bath of said flux at a temperature of about 100* to 212* F. for a period of about 1 to 2 minutes, and maintaining said flux bath at an acid concentration of about 1 to 4 percent.
Claim 2
Dependent Claim
14 words
The process of claim 2 including said organic aromatic carboxyl acid is salicylic acid.
Claim 3
Dependent Claim
14 words
The process of claim 2 including said organic aromatic carboxylic acid is 5-chlorosalicylic acid.
Claim 4
Dependent Claim
71 words
The process of claim 2 including subsequent to applying said flux but prior to applying said molten aluminum to said ferrous article drying said ferrous article at about 300* to 400* F., and applying said molten aluminum to said ferrous article by immersion of said ferrous article in a molten aluminum bath for a period of about 1 to 2 minutes at a temperature of about 1, 250* to 1,400* F.
Claim 5
Dependent Claim
27 words
The process of claim 5 including maintaining said flux bath at a temperature of about 160* to 212* F. during the period of ferrous article immersion therein.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |