US4268364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-zinc alloy deposition from a sulfamate bath
Assignee: Inco Research and Development Center Inc
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Filing: 1980-03-18
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Granted: 1981-05-19
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Expires: 2000-03-18
Abstract
Abstract An electroplating bath and process for producing a nickel-zinc alloy electrodeposit containing about 8% to 35% nickel characterized in that the bath is essentially a boric acid-containing sulfamate bath maintained at a pH of 2.5 to 4.0 and operated at a cathode current density of about 10 to 25 mA cm -2 and at a temperature of about 20° C. to 70° C.
Inventors
- 👤 Dale E. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:27
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/565
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
A process for electrodeposition of nickel-zinc alloy containing about 8% to 35% by weight of nickel, balance essentially zinc comprising cathodically depositing such alloy on a substrate from a plating bath containing about 50 to 60 gpl of divalent nickel added as the sulfamate, about 5 to about 14 gpl of zinc added as the sulfate, about 20 to 35 gpl of boric acid with the balance being essentially water and free acid sufficient to adjust the pH of the plating bath to within the range of 2.5 to 4.0 while maintaining said bath at a temperature from about 20° C. to about 70° C. and a cathode current density of about 10 to 25 mA cm -2 .
Claim 2
Dependent Claim
119 words
A process for electrodeposition of nickel-zinc alloy containing about 8% to 35% by weight of nickel, balance essentially zinc comprising cathodically depositing such alloy on a substrate from a plating bath containing about 50 to 60 gpl of divalent nickel added as the sulfamate, about 5 to about 14 gpl of zinc added as the sulfate, about 20 to 35 gpl of boric acid with the balance being essentially water and free acid sufficient to adjust the pH of the plating bath to within the range of 2.5 to 4.0 while maintaining said bath at a temperature from about 20° C. to about 70° C. and a cathode current density of about 10 to 25 mA cm -2 .
Claim 3
Dependent Claim
26 words
A process as in claim 1 wherein the zinc content of the bath is about 6 gpl and the pH is adjusted to 2.5 to 2.8.
Claim 4
Dependent Claim
25 words
A process as in claim 1 wherein the zinc content of the bath is about 13 gpl and the pH is adjusted to about 3.8.
Claim 5
Dependent Claim
18 words
A process as in claim 1 wherein the temperature is maintained at about 40° C. to 50° C.
Claim 6
Dependent Claim
66 words
An electroplating bath for electrodepositing nickel-zinc alloy containing about 50 to 60 gpl of divalent nickel added as the sulfamate, about 5 to about 14 gpl of zinc added as the sulfate, about 20 to 35 gpl of boric acid with the balance being essentially water and free acid sufficient to adjust the pH of the plating bath to within the range of 2.5 to 4.0.
Claim 7
Dependent Claim
66 words
An electroplating bath for electrodepositing nickel-zinc alloy containing about 50 to 60 gpl of divalent nickel added as the sulfamate, about 5 to about 14 gpl of zinc added as the sulfate, about 20 to 35 gpl of boric acid with the balance being essentially water and free acid sufficient to adjust the pH of the plating bath to within the range of 2.5 to 4.0.
Claim 8
Dependent Claim
24 words
An electroplating bath as in claim 5 wherein the zinc content is about 6 gpl and the pH is adjusted to 2.5 to 2.8.
Claim 9
Dependent Claim
23 words
An electroplating bath as in claim 5 wherein the zinc content is about 13 gpl and the pH is adjusted to about 3.8.
Claim 10
Dependent Claim
26 words
A substrate having thereon a nickel-zinc alloy containing about 8% to 35% by weight of nickel, balance essentially zinc electrodeposited from the bath of claim 5.
References Cited (Backward Citations)
US3691027A
Cited
DE2800258A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |