US4169916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel sheets and method of treating steel sheets
Assignee: Toyo Kohan Co Ltd
•
Filing: 1977-11-28
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Granted: 1979-10-02
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Expires: 1997-11-28
Abstract
Abstract A method of treating steel sheets which have good corrosion resistance after forming, which comprises coating a steel sheet with a solution which contains: (a) water-soluble or water-dispersible lithium silicate at a concentration of 2 to 250 g/l, which lithium silicate is a mixture of silicic acid or silicate and lithium salt in a molar ratio of 20:1 to 1:1. (b) at least one water-soluble or water-dispersible saturated or unsaturated fatty acid compound, higher alcohol wax, polyethylene type resin, fluorine type resin or silicone type resin at a concentration of 1 to 250 g/l.
Inventors
- 👤 Nobuyuki Tsutsui
- 👤 Hitoshi Omura
- 👤 Takashi Mizobe
- 👤 Katsumi Kanda
- 👤 Terunori Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:39
CPC Classifications
C; C10; C10M; C10M3/00; C10M173/00; C10M173/02; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/62; C10M2201/00; C10M2201/085; C10M2201/086; C10M2201/10; C10M2201/102; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/14; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31678; Y10T428/31714
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A method of treating steel sheets which have good corrosion resistance after forming, which comprises coating a steel sheet with an effective amount to inhibit corrosion, of a solution which consists essentially of water and: (a) water-soluble or water-dispersible lithium silicate at a concentration of 2 to 250 g/l, which lithium silicate is a mixture of silicic acid or silicate and lithium salt in a molar ratio of 20:1 to 1:1, (b) at least one water-soluble or water-dispersible saturated or unsaturated fatty acid compound, higher alcohol wax, polyethylene type resin, or silicone type resin at a concentration of 1 to 250 g/l, (c) at least one water-soluble phosphate or phosphoric acid at a concentration of 1 to 100 g/l.
Claim 2
Independent Claim
119 words
A method of treating steel sheets which have good corrosion resistance after forming, which comprises coating a steel sheet with an effective amount to inhibit corrosion, of a solution which consists essentially of water and: (a) water-soluble or water-dispersible lithium silicate at a concentration of 2 to 250 g/l, which lithium silicate is a mixture of silicic acid or silicate and lithium salt in a molar ratio of 20:1 to 1:1, (b) at least one water-soluble or water-dispersible saturated or unsaturated fatty acid compound, higher alcohol wax, polyethylene type resin, or silicone type resin at a concentration of 1 to 250 g/l, (c) at least one water-soluble phosphate or phosphoric acid at a concentration of 1 to 100 g/l.
Claim 3
Dependent Claim
17 words
A method of treating steel sheets according to claim 1 wherein said lithium salt is lithium hydroxide.
Claim 4
Dependent Claim
28 words
A method according to claim 1 wherein there is employed phosphate selected from the group consisting of monosodium hydrogen phosphate, disodium hydrogen phosphate, ammonium phosphate or potassium phosphate.
Claim 5
Dependent Claim
31 words
A method of treating metal sheets according to claim 1 wherein the steel is plated with a metal selected from the group consisting of zinc, chromium, tin, copper, nickel or aluminum.
Claim 6
Dependent Claim
14 words
A method according to claim 1 wherein the sheet is a cold-rolled steel sheet.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein silicate is selected from the group consisting of potasium or sodium silicate.
Claim 8
Dependent Claim
29 words
A method according to claim 1 wherein the fatty acid compound is employed and said compound is selected from the group consisting of stearates, palmitates, myristates, oleates and linolates.
Claim 9
Dependent Claim
28 words
A method according to claim 1 wherein an alcohol-type wax is employed and said wax is selected from the group consisting of melissyl alchol, tetracosanol and stearyl alcohol.
Claim 10
Dependent Claim
24 words
A method according to claim 1 wherein a polyethylene type resin is employed and said resin has a molecular weight of 5,000 to 40,000.
Claim 11
Dependent Claim
29 words
A method according to claim 1 wherein a silicone-type resin is employed and said resin is selected from the group consisting of dimethylpolysiloxanes, methylhydrogen polysiloxanes and silicone alkyd varnish.
Claim 12
Dependent Claim
15 words
A method according to claim 1 wherein the steel sheet is dried immediately after coating.
Claim 13
Dependent Claim
10 words
The steel sheet produced by the process of claim 11.
Claim 14
Dependent Claim
24 words
A method according to claim 11 wherein the treated steel sheet is forced dried at a temperature of from 80° C. to 200° C.
References Cited (Backward Citations)
US2699407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |