US4071380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating oxidized steel surfaces
Assignee: Individual
•
Filing: 1976-09-02
•
Granted: 1978-01-31
•
Expires: 1996-09-02
Abstract
Abstract A method of treating a corrosible steel substrate having a coating of oxidized steel thereon, which comprehends applying to the oxidized steel coating a solution of an alkyl silicate in quantity sufficient to saturate the oxidized steel coating, permitting the solution to cure by hydrolysis, and thereupon to apply a topcoating. The solution may be partially prehydrolyzed as within the range of 40-98% and may contain dry particulate matter which is water insoluble and having a coloration sufficient for visual detection so as to readily indicate the state of saturation of the oxidized steel coating. Furthermore, the solution may additionally contain water soluble corrosion inhibiting compounds for producing ions which will react with the anodic steel substrate.
Inventors
- 👤 George T. Shutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C23; C23C; C23C22/00; C23C22/82; C23C22/83
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A method for treating a corrosible steel substrate having a rusted oxidized layer thereon comprising applying to said oxidized layer a solution of a partially cured alkyl silicate wherein the alkyl group of said alkyl silicates contains 1 to 8 carbon atoms and zinc, if present, in quantities less than required to cause electrolytic action with the metal substrate, said solution being in such quantity as to saturate the oxidized layer, permitting the applied solution to cure for developing a film stably maintaining the rusted oxidized layer upon said substrate, and then applying a top coating upon said cured silicate film.
Claim 2
Independent Claim
101 words
A method for treating a corrosible steel substrate having a rusted oxidized layer thereon comprising applying to said oxidized layer a solution of a partially cured alkyl silicate wherein the alkyl group of said alkyl silicates contains 1 to 8 carbon atoms and zinc, if present, in quantities less than required to cause electrolytic action with the metal substrate, said solution being in such quantity as to saturate the oxidized layer, permitting the applied solution to cure for developing a film stably maintaining the rusted oxidized layer upon said substrate, and then applying a top coating upon said cured silicate film.
Claim 3
Dependent Claim
38 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 1 and further characterized by said solution of the alkyl silicate being hydrolyzed within the range of 40 to 98%.
Claim 4
Dependent Claim
33 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 2 and further characterized by applying said solution of an alkyl silicate under ambient conditions.
Claim 5
Dependent Claim
114 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 1 and further characterized by said solution of a partially cured alkyl silicate having dry particulate matter mixed therein, said particulate matter being from the class consisting of silica, talc, mica, kaolin, bentonite, asbestos, fireclay, aluminum oxide, zircon, ferric oxide, tin oxide, titanium oxide, chromium oxide, carbon, copper oxide, copper, aluminum, stainless steel, and zinc in quantities less than required to cause electrolytic action with the metal substrate, said dry particulate matter being in the ratio of one part thereof by volume to between one part to 100 parts by volume of the alkyl silicate solution.
Claim 6
Dependent Claim
30 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 4 and further characterized by said dry particulate matter being water insoluble.
Claim 7
Dependent Claim
32 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 4 and further characterized by said dry particulate matter being of readily visible coloration.
Claim 8
Dependent Claim
34 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 4 and further characterized by said dry particulate matter having a mesh size of approximately -325.
Claim 9
Dependent Claim
86 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 4 and further characterized by an inorganic water soluble corrosion inhibiting compound capable of producing ions for reaction with the steel substrate mixed with said alkyl silicate solution, said water soluble compounds being from the class consisting of sodium phosphate, calcium phosphate, potassium phosphate, ammonium phosphate and magnesium phosphate, said water soluble compounds being within the range of .01 to 15% by weight of the alkyl silicate solution.
Claim 10
Dependent Claim
133 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 1 and further characterized by a dry particulate matter mixed within the alkyl silicate solution, said dry particulate matter being water insoluble, nonreactive with the silicate and with the substrate, and being of a readily visible coloration, said dry particulate matter being from the class consisting of silica, talc, mica, kaolin, bentonite, asbestos, fireclay, aluminum oxide, zircon, ferric oxide, tin oxide, titanium oxide, chromium oxide, carbon, copper oxide, copper, aluminum, stainless steel, and zinc in quantities less than required to cause electrolytic action with the metal substrate, said dry particulate matter being in the ratio of one part thereof by volume to between one part to 100 parts by volume of the alkyl silicate solution.
Claim 11
Dependent Claim
86 words
A method of treating a corrosible steel substrate having a rusted oxidized layer thereon as defined in claim 1 and further characterized by an inorganic water soluble corrosion inhibiting compound capable of producing ions for reaction with the steel substrate mixed with said alkyl silicate solution, said water soluble compounds being from the class consisting of sodium phosphate, calcium phosphate, potassium phosphate, ammonium phosphate, and magnesium phosphate, said water soluble compounds being in the range of .01 to 15% by weight of the alkyl silicate solution.
References Cited (Backward Citations)
US3056684A
Cited
US3258346A
Cited
US3232771A
Cited
US3392036A
Cited
US3432312A
Cited
US3778280A
Cited
US3660119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |