US4048006A
Expired / Lapsed
US
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Stripping of electroplated nickel-iron alloys
Assignee: M&T HARSHAW
•
Filing: 1975-08-05
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Granted: 1977-09-13
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Expires: 1995-08-05
Abstract
Abstract A composition and process for selectively removing nickel-iron alloys from a metal substrate which comprises contacting said metal surface with an aqueous bath containing: A. at least one nitro substituted organic compound containing at least one solubilizing group; B. at least one organic amine or polyamine or substituted amine or polyamine; and C. at least one aliphatic carboxylic acid or salt thereof, or a compound which will yield said carboxylic acid or salt thereof in solution, further characterized in that said aliphatic carboxylic acid or salt thereof additionally contains at least one substituent group selected from -NH 2 or quaternary amine salts thereof, -OH, or -SH. By nickel-iron alloy deposit is meant a deposit containing from about 5 to 90 percent by weight iron with that portion which is not iron being primarily nickel or nickel and cobalt. Although small amounts of impurities such as copper, zinc, cadmium, lead, etc. may also be present, the major constituents of the alloy are nickel and iron.
Inventors
- 👤 Edward Paul Harbulak
- 👤 Ronald J. Lash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:33
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/44
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
115 words
A process for selectively removing nickel-iron alloys containing from 5% to 90% iron from the surface of a metal substrate which comprises contacting said nickel-iron alloys with an aqueous bath consisting of: a. at least one nitro substituted organic compound containing at least one solubilizing group; b. at least one organic amine or polyamine or substituted amine or polyamine; and c. at least one aliphatic carboxylic acid or salt thereof, or a compound which will yield said carboxylic acid or salt thereof in solution, further characterized in that additionally said aliphatic carboxylic acid or salt thereof contains at least one substituent group selected from -NH 2 , or quaternary amine salts thereof, -OH or -SH.
Claim 2
Dependent Claim
115 words
A process for selectively removing nickel-iron alloys containing from 5% to 90% iron from the surface of a metal substrate which comprises contacting said nickel-iron alloys with an aqueous bath consisting of: a. at least one nitro substituted organic compound containing at least one solubilizing group; b. at least one organic amine or polyamine or substituted amine or polyamine; and c. at least one aliphatic carboxylic acid or salt thereof, or a compound which will yield said carboxylic acid or salt thereof in solution, further characterized in that additionally said aliphatic carboxylic acid or salt thereof contains at least one substituent group selected from -NH 2 , or quaternary amine salts thereof, -OH or -SH.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said nitro substituted organic compound is a nitrobenzoic acid.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein said nitro substituted organic compound is a nitrobenzene sulfonic acid.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said nitro substituted organic compound is a nitrophenol.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said nitro substituted organic compound is a nitroaniline.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein said organic amine is ethylenediamine.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said organic amine is ethylenediaminetetraacetic acid.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said organic amine is diethylenetriamineepentaacetic acid.
Claim 10
Dependent Claim
11 words
The process of claim 1 wherein said organic amine is 1,2-diaminopropane.
Claim 11
Dependent Claim
11 words
The process of claim 1 wherein said organic amine is 2,3-diaminobutane.
Claim 12
Dependent Claim
11 words
The process of claim 1 wherein said organic amine is 1,3-diaminopropane.
Claim 13
Dependent Claim
11 words
The process of claim 1 wherein said organic amine is 1,2,3-triaminopropane.
Claim 14
Dependent Claim
11 words
The process of claim 1 wherein said organic amine is diethylenetriamine.
Claim 15
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is glycolic acid.
Claim 16
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is thioglycolic acid.
Claim 17
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is lactic acid.
Claim 18
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is tartaric acid.
Claim 19
Dependent Claim
12 words
The process of claim 1 wherein said aliphatic carboxylic acid is glycine.
Claim 20
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is citric acid.
Claim 21
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is aspartic acid.
Claim 22
Dependent Claim
13 words
The process of claim 1 wherein said aliphatic carboxylic acid is gluconic acid.
Claim 23
Dependent Claim
12 words
The process of claim 1 wherein said aliphatic carboxylic acid is cysteine.
Claim 24
Dependent Claim
139 words
A composition for selectively stripping nickel-iron alloys containing from 5% to 90% iron from the surface of a metal substrate which comprises an aqueous bath consisting of: a. from 0.015 moles per liter to 2.2 moles per liter of at least one nitro substituted organic compound containing at least one solubilizing group; b. from 0.015 moles per liter to 7 moles per liter of at least one organic amine, polyamine or substituted amine or polyamine; and c. from 0.13 moles per liter to 5.0 moles per liter of at least one aliphatic carboxylic acid or salt thereof, or a compound which will give said carboxylic acid or salt thereof in solution, characterized in that said aliphatic carboxylic acid or salt thereof contains at least one substituent group selected from -NH 2 , or quaternary amine salts thereof, or -OH.
Claim 25
Dependent Claim
139 words
A composition for selectively stripping nickel-iron alloys containing from 5% to 90% iron from the surface of a metal substrate which comprises an aqueous bath consisting of: a. from 0.015 moles per liter to 2.2 moles per liter of at least one nitro substituted organic compound containing at least one solubilizing group; b. from 0.015 moles per liter to 7 moles per liter of at least one organic amine, polyamine or substituted amine or polyamine; and c. from 0.13 moles per liter to 5.0 moles per liter of at least one aliphatic carboxylic acid or salt thereof, or a compound which will give said carboxylic acid or salt thereof in solution, characterized in that said aliphatic carboxylic acid or salt thereof contains at least one substituent group selected from -NH 2 , or quaternary amine salts thereof, or -OH.
Claim 26
Dependent Claim
15 words
The composition of claim 23 wherein said nitro substituted organic compound is a nitrobenzoic acid.
Claim 27
Dependent Claim
16 words
The composition of claim 23 wherein said nitro substituted organic compound is a nitrobenzene sulfonic acid.
Claim 28
Dependent Claim
14 words
The composition of claim 23 wherein said nitro substituted organic compound is a nitrophenol.
Claim 29
Dependent Claim
14 words
The composition of claim 23 wherein said nitro substituted organic compound is a nitroaniline.
Claim 30
Dependent Claim
12 words
The composition of claim 23 wherein said organic amine is ethylene diamine.
Claim 31
Dependent Claim
12 words
The composition of claim 23 wherein said organic amine is ethylenediaminetetraacetic acid.
Claim 32
Dependent Claim
12 words
The composition of claim 23 wherein said organic amine is diethylenetriaminepentaacetic acid.
Claim 33
Dependent Claim
11 words
The composition of claim 23 wherein said organic amine is 1,2-diaminopropane.
Claim 34
Dependent Claim
11 words
The composition of claim 23 wherein said organic amine is 2,3-diaminobutane.
Claim 35
Dependent Claim
11 words
The composition of claim 23 wherein said organic amine is 1,3-diaminopropane.
Claim 36
Dependent Claim
11 words
The composition of claim 23 wherein said organic amine is 1,2,3-triaminopropane.
Claim 37
Dependent Claim
11 words
The composition of claim 23 wherein said organic amine is diethylenetriamine.
Claim 38
Dependent Claim
13 words
The composition of claim 23 wherein said aliphatic carboxylic acid is glycolic acid.
Claim 39
Dependent Claim
13 words
The composition of claim 23 wherein said aliphatic carboxylic acid is lactic acid.
Claim 40
Dependent Claim
13 words
The composition of claim 23 wherein said aliphatic carboxylic acid is tartaric acid.
Claim 41
Dependent Claim
12 words
The composition of claim 23 wherein said aliphatic carboxylic acid is glycine.
Claim 42
Dependent Claim
13 words
The composition of claim 23 wherein said aliphatic carboxylic acid is citric acid.
Claim 43
Dependent Claim
13 words
The composition of claim 23 wherein said aliphatic carboxylic acid is aspartic acid.
Claim 44
Dependent Claim
13 words
The composition of claim 23 wherein said aliphatic carboxylic acid is gluconic acid.
Claim 45
Dependent Claim
12 words
The composition of claim 23 wherein said aliphatic carboxylic acid is cysteine.
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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 |