Patent US3974323A successfully refreshed from Google Patents.
US3974323A
Expired / Lapsed
US
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Metal article having protective thin film coating and method of applying
Assignee: United States Department of the Navy
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Filing: 1973-11-19
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Granted: 1976-08-10
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Expires: 1993-11-19
Abstract
Abstract Amino compounds are applied to steel and aluminum by direct application andlso from solution, and then subjected to ultraviolet radiation to produce photooxidative polymerization of the coating on the surface of the metal. Adherent thin film polymers are thus produced on the metal which resist wetting and are corrosion resistant to prevent rust or oxidation of the metal.
Inventors
- 👤 Carl V. Brouillette
- 👤 Harry Hochman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:19
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067; B05D3/10; B05D3/102; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
93 words
A coated metal article comprising a metal substrate with a protective thin film coating thereon for inhibiting corrosion and oxidation of the metal surface due to elements in the atmosphere and in a marine atmospheric environment, comprising: a. a coating of an amine compound adhered onto the surface of the metal substrate; b. said amine compound coating being in the form of a photo-oxidative polymerized thin film cured on and bonded to the metal surface; c. said cured coating being a thin film polymer/metal complex which is hydrophobic, and corrosion and oxidation inhibiting.
Claim 2
Dependent Claim
93 words
A coated metal article comprising a metal substrate with a protective thin film coating thereon for inhibiting corrosion and oxidation of the metal surface due to elements in the atmosphere and in a marine atmospheric environment, comprising: a. a coating of an amine compound adhered onto the surface of the metal substrate; b. said amine compound coating being in the form of a photo-oxidative polymerized thin film cured on and bonded to the metal surface; c. said cured coating being a thin film polymer/metal complex which is hydrophobic, and corrosion and oxidation inhibiting.
Claim 3
Dependent Claim
26 words
A coated article as in claim 1 wherein said amine compound is selected from: propylenediamine, p-p' methylenedianiline, diphenylamine, melamine, hexamethylenetetramine, N-N diethyl-p-phenylenediamine, o-phenylene-diamine, m-phenylenediamine, and p-phenylenediamine.
Claim 4
Dependent Claim
14 words
A coated metal article as in claim 1 wherein said metal surface is steel.
Claim 5
Dependent Claim
14 words
A coated metal article as in claim 1 wherein said metal surface is aluminum.
Claim 6
Dependent Claim
14 words
A coated article as in claim 1 wherein said amine compound is a phenylenediamine.
Claim 7
Dependent Claim
17 words
A coated article as in claim 5 wherein said phenylenediamine is any of o-phenylenediamine, m-phenylenediamine and p-phenylenediamine.
Claim 8
Dependent Claim
20 words
A coated article as in claim 1 wherein said amine compound is any of phenylenediamine, melamine, diphenylamine and p-p' methylenedianiline.
Claim 9
Independent Claim
104 words
A method for treating metal and metal having an oxide coating for producing a protective surface thereon resistant to corrosion in a marine atmospheric environment, comprising: a. applying to the metal surface an amine compound thin film coating selected from the group consisting of: propylenediamine p-p' methylenedianiline diphenylamine melamine hexamethylenetetramine N-n diethyl-p-phenylenediamine o-phenylenediamine m-phenylenediamine p-phenylenediamine; b. curing the coating by producing photo-oxidative polymerization thereof through the means of irradiating the thin film coating with ultraviolet energy, thus forming a tightly adherent thin film polymer/metal complex on the surface of the metal which is hydrophobic, and resists corrosion due to moisture, oxidation, and acid attack.
Claim 10
Independent Claim
104 words
A method for treating metal and metal having an oxide coating for producing a protective surface thereon resistant to corrosion in a marine atmospheric environment, comprising: a. applying to the metal surface an amine compound thin film coating selected from the group consisting of: propylenediamine p-p' methylenedianiline diphenylamine melamine hexamethylenetetramine N-n diethyl-p-phenylenediamine o-phenylenediamine m-phenylenediamine p-phenylenediamine; b. curing the coating by producing photo-oxidative polymerization thereof through the means of irradiating the thin film coating with ultraviolet energy, thus forming a tightly adherent thin film polymer/metal complex on the surface of the metal which is hydrophobic, and resists corrosion due to moisture, oxidation, and acid attack.
Claim 11
Dependent Claim
29 words
A method as in claim 8 wherein said amine compound coating is applied to the metal surface in solution form with 0.1 grams of amine per 10.0 ml solution.
Claim 12
Dependent Claim
27 words
A method as in claim 9 wherein said solution in which the amine compound is dissolved consists of 3 grams of benzil per 300 ml of benzene.
Claim 13
Dependent Claim
27 words
A method as in claim 9 wherein said solution, in which said amine compound is dissolved, consists of 3 grams of benzil per 300 ml of aniline.
Claim 14
Dependent Claim
34 words
A method as in claim 9 wherein said solution, in which said amine compound is dissolved, consists of 3 grams of benzil per mixture of 150 ml of benzene and 150 ml of aniline.
Claim 15
Dependent Claim
24 words
A method as in claim 8 wherein said amine compound is in powdered crystalline form which is rubbed onto the surface of the metal.
Claim 16
Dependent Claim
33 words
A method as in claim 8 wherein said amine compound coating is applied to the metal surface in a solution of p-p' methylenedianiline dissolved in benzene, 0.1 gram amine per 10.0 ml benzene.
Claim 17
Dependent Claim
32 words
A method as in claim 8 wherein said amine compound coating is applied to the metal surface in a solution of amine dissolved in aniline, 0.1 gram amine per 10 ml aniline.
Claim 18
Dependent Claim
45 words
A method as in claim 9 wherein said solution in which the amine compound is dissolved consists of 3 grams of benzil per 300 ml of the mixture consisting of from 0 to 300 ml of benzene and from 0 to 300 ml of aniline.
Claim 19
Dependent Claim
32 words
A method as in claim 9 wherein said solution in which the amine compound is dissolved consists of from 0 to 10 ml of benzene per 0 to 10 ml of aniline.
Claim 20
Dependent Claim
43 words
The method as in claim 8 wherein said amine compound is applied to the metal surface by washing the metal surface with a solution of amine compound in a suitable solvent and applying sufficient heat to speed the drying time of the coating.
Claim 21
Dependent Claim
28 words
The method as in claim 8 wherein said amine compound is in solution with a suitable solvent, applied to the metal surface as a vapor and condensed thereon.
Claim 22
Dependent Claim
27 words
The method as in claim 8 wherein said thin film amine compound coating initially applied is used to enhance the bonding of another amine protective coating thereto.
Claim 23
Dependent Claim
27 words
The method as in claim 8 wherein said thin film amine compound coating initially applied is used to enhance the bonding of an amide-cured protective coating thereto.
Claim 24
Dependent Claim
38 words
The method as in claim 8 wherein said amine compound is applied to the metal surface in a suitable solution of solvent which contributes as a sensitizer to the photooxidative process, said solution also containing a quenching agent.
Claim 25
Dependent Claim
31 words
The method as in claim 22 wherein said solvent which contributes to the photo-oxidative process is selected from at least one of aniline and benzene, and said quenching agent is benzil.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |