US4047977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of continuous galvanizing steel strip on partial or one side
Assignee: Nippon Steel Corp
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Filing: 1975-10-30
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Granted: 1977-09-13
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Expires: 1995-10-30
Abstract
Abstract A method of continuous galvanizing a steel strip partially or one side, which comprises applying silicone resin to a part or on one side of the steel strip which is to be left non-plated in a subsequent continuous molten zinc coating, baking the silicon resin coated steel strip at a temperature ranging from 300 to 800 DEG C in an oxidizing atmosphere, and subjecting the steel strip to heat treatment in a reducing atmosphere and introducing the heat treated steel strip to a zinc coating bath.
Inventors
- 👤 Katsuyoshi Yoshida
- 👤 Yukio Kitajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:39
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/02; C23C2/022; C23C2/0222; C23C2/003; C23C2/0038; C23C2/0224
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A method of continuous galvanizing a steel strip partially or one side, which comprises applying a silicone resin selected from the group consisting of polysilalkylenes and polysiloxanes to a part or on one side of the steel strip which is to be left non-plated in a subsequent continuous molten zinc coating, baking the silicone resin coated steel strip at a temperature ranging from 300° to 800° C for 2 to 30 seconds in an oxidizing atmosphere to deposit a masking film, and subjecting the steel strip to heat treatment in a reducing atmosphere and introducing the heat treated steel strip to a zinc coating bath.
Claim 2
Independent Claim
105 words
A method of continuous galvanizing a steel strip partially or one side, which comprises applying a silicone resin selected from the group consisting of polysilalkylenes and polysiloxanes to a part or on one side of the steel strip which is to be left non-plated in a subsequent continuous molten zinc coating, baking the silicone resin coated steel strip at a temperature ranging from 300° to 800° C for 2 to 30 seconds in an oxidizing atmosphere to deposit a masking film, and subjecting the steel strip to heat treatment in a reducing atmosphere and introducing the heat treated steel strip to a zinc coating bath.
Claim 3
Dependent Claim
24 words
A method according to claim 1, in which the silicone resin is coated in an amount of 0.5-50 g/m 2 as the resin content.
Claim 4
Dependent Claim
39 words
A method according to claim 1, in which one or more members selected from the group consisting of metallic oxides, metallic hydroxides, metallic nitrides, metallic carbides, metallic carbonates, metallic phosphates and metallic silicates is added to the silicone resin.
Claim 5
Dependent Claim
23 words
A method according to claim 3, in which the amount of the additive to the silicone resin is less than 50% by weight.
Claim 6
Dependent Claim
23 words
A method according to claim 1, in which the residual resin coating, after plating, is removed by acid pickling in an HCl solution.
Claim 7
Dependent Claim
32 words
A method according to claim 1, in which the residual resin coating, after plating, is removed by etching with chromate treating liquid effective to prevent white rust on zinc coated steel plates.
Claim 8
Dependent Claim
18 words
A method according to claim 1, in which the residual resin coating, after plating, is removed by brushing.
Claim 9
Dependent Claim
26 words
A method according to claim 1, in which the residual resin coating, after plating, is removed by acid pickling in an H 2 SO 4 solution.
Claim 10
Dependent Claim
16 words
A method according to claim 1 wherein the baking temperature is between 400° and 800° C.
References Cited (Backward Citations)
US2743192A
Cited
US2498485A
Cited
US2894850A
Cited
US3177085A
Cited
US3055776A
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US3758388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |