US3954512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coating of ferrous base metal articles
Assignee: Individual
•
Filing: 1974-12-13
•
Granted: 1976-05-04
•
Expires: 1994-12-13
Abstract
Abstract Iron, steel, and iron base alloys are provided with coatings made by forming an adherent oxide layer on the surface, treating the oxide layer with at least one Group III metal, then oxidizing the Group III metal, after which the oxidized Group III metal is treated with pyrochlore-microlite mineral. The coatings are useful for providing corrosion and oxidation resistance, particularly at elevated temperatures.
Inventors
- 👤 Jerome J. Kanter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; H01F1/14783; C; C23; C23C; C23C22/00; C23C22/82
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
128 words
In a process for providing a coating on a ferrous base metal having an adherent oxide layer formed on a surface thereof, the steps comprising: frictionally contacting said oxide layer of the ferrous base metal article with at least one metal in solid phase from Group III of the periodic table in order to complex said Group III metal with said oxide layer and form a coating thereon, said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, oxidizing at least a portion of said Group III metal contained in said coating, and frictionally contacting said oxidized Group III metal with pyrochlore-microlite mineral materials so as to at least form a complex with the oxide of the Group III metal.
Claim 2
Dependent Claim
128 words
In a process for providing a coating on a ferrous base metal having an adherent oxide layer formed on a surface thereof, the steps comprising: frictionally contacting said oxide layer of the ferrous base metal article with at least one metal in solid phase from Group III of the periodic table in order to complex said Group III metal with said oxide layer and form a coating thereon, said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, oxidizing at least a portion of said Group III metal contained in said coating, and frictionally contacting said oxidized Group III metal with pyrochlore-microlite mineral materials so as to at least form a complex with the oxide of the Group III metal.
Claim 3
Dependent Claim
14 words
A process according to claim 1 in which said Group III metal comprises aluminum.
Claim 4
Dependent Claim
19 words
A process according to claim 1 in which said Group III metal comprises at least one rare earth metal.
Claim 5
Dependent Claim
14 words
A process according to claim 1 in which said Group III metal comprises yttrium.
Claim 6
Dependent Claim
23 words
A process according to claim 1 in which said oxidation step comprises treating said Group III metal with a phosphorus containing acidic compound.
Claim 7
Dependent Claim
15 words
A process according to claim 1 in which said ferrous base metal article is steel.
Claim 8
Dependent Claim
18 words
A process according to claim 1 in which said ferrous base metal article is a ferrous base alloy.
Claim 9
Dependent Claim
18 words
A process according to claim 1 in which said ferrous base metal article is a weldable carbon steel.
Claim 10
Dependent Claim
11 words
The article produced in accordance with the process of claim 1.
Claim 11
Dependent Claim
11 words
The article produced in accordance with the process of claim 2.
Claim 12
Dependent Claim
11 words
The article produced in accordance with the process of claim 3.
Claim 13
Dependent Claim
11 words
The article produced in accordance with the process of claim 4.
Claim 14
Dependent Claim
11 words
The article produced in accordance with the process of claim 5.
Claim 15
Dependent Claim
11 words
The article produced in accordance with the process of claim 6.
Claim 16
Dependent Claim
11 words
The article produced in accordance with the process of claim 7.
Claim 17
Dependent Claim
118 words
In a process for providing a coating on ferrous base metal articles, the steps comprising: forming an adherent oxide layer on a surface of a ferrous base metal article, treating said oxide layer with at least one metal in solid form from Group III of the periodic table by frictional contacts so as to form a coating thereon, said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, oxidizing at least a portion of the Group III metal contained in said coating, and treating said oxidized Group III metal layer with pyrochlore-microlite mineral materials so as to at least form a complex with the oxide of the Group III metal.
Claim 18
Dependent Claim
118 words
In a process for providing a coating on ferrous base metal articles, the steps comprising: forming an adherent oxide layer on a surface of a ferrous base metal article, treating said oxide layer with at least one metal in solid form from Group III of the periodic table by frictional contacts so as to form a coating thereon, said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, oxidizing at least a portion of the Group III metal contained in said coating, and treating said oxidized Group III metal layer with pyrochlore-microlite mineral materials so as to at least form a complex with the oxide of the Group III metal.
Claim 19
Dependent Claim
14 words
A process according to claim 16 in which said Group III metal comprises aluminum.
Claim 20
Dependent Claim
23 words
A process according to claim 16 in which said oxidizing step comprises treating said Group III metal with a phosphorus containing acidic compound.
References Cited (Backward Citations)
US3700505A
Cited
US3883370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |