US3909209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating aluminum and aluminum alloys and article produced thereby
Assignee: JPI Transportation Products Inc
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Filing: 1973-11-05
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Granted: 1975-09-30
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Expires: 1993-11-05
Abstract
Abstract Aluminum and aluminum alloys are rendered solderable and protected against galvanic corrosion by the application successively of an adherent base system followed by plates of nickel and zinc. Further protection against tarnishing and atmospheric corrosion in storage is achieved by the application of a chromate coating.
Inventors
- 👤 Wayne A Kruper
- 👤 George R Kingsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:24
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D5/12; B; B23; B23K; B23K35/00; B23K35/001; B23K35/002; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12736; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12861; Y10T428/12931
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
107 words
A METHOD OF SIMULTANEOUSLY RENDERING, SOLDERABLE AND PROTECTED AGAINST GALVANIC CORROSION, A CLEAN ALUMINUM OR ALUMINUM BASE ALLOY SURFACE TO WHICH A NICKEL COAT WILL NOT ADHERE, WHICH METHOD CONSISTS ESSENTIALLY OF APPLYING TO SAID SURFACE AN ADHERENT BASE SYSTEM WHICH PROMOTES ADHESION BETWEEN SAID SURFACE AND A SUBSEQUENTLY APPLIED NICKEL COAT AND THEN RINSING THE TREATED SURFACE, APPLYING TO SAID ADHERENT BASE SYSTEM A NICKEL COAT HAVING A THICKNESS WITHIN THE RANGE OF 2.1-200 IN. X10**6 AND THEN RINSING THR TREATED SURFACE, AND APPLYING TO SAID NICKEL COAT A ZINC COAT HAVING A THICKNESS WITHIN THE RANGE OF 1.0-100 IN.X10**6 AND THEN RINSING THE TREATED SURFACE.
Claim 2
Independent Claim
107 words
A METHOD OF SIMULTANEOUSLY RENDERING, SOLDERABLE AND PROTECTED AGAINST GALVANIC CORROSION, A CLEAN ALUMINUM OR ALUMINUM BASE ALLOY SURFACE TO WHICH A NICKEL COAT WILL NOT ADHERE, WHICH METHOD CONSISTS ESSENTIALLY OF APPLYING TO SAID SURFACE AN ADHERENT BASE SYSTEM WHICH PROMOTES ADHESION BETWEEN SAID SURFACE AND A SUBSEQUENTLY APPLIED NICKEL COAT AND THEN RINSING THE TREATED SURFACE, APPLYING TO SAID ADHERENT BASE SYSTEM A NICKEL COAT HAVING A THICKNESS WITHIN THE RANGE OF 2.1-200 IN. X10**6 AND THEN RINSING THR TREATED SURFACE, AND APPLYING TO SAID NICKEL COAT A ZINC COAT HAVING A THICKNESS WITHIN THE RANGE OF 1.0-100 IN.X10**6 AND THEN RINSING THE TREATED SURFACE.
Claim 3
Dependent Claim
23 words
The method defined in claim 1 wherein said adherent base system comprises a first coating of zinc and a second coating of copper.
Claim 4
Dependent Claim
46 words
The method defined in claim 2 wherein said first zinc coating has a thickness within the range of about 0.5 to 5.0 in. X 10 6, and said second copper coating has a thickness within the range of about 5 to 200 in. X 10 6.
Claim 5
Dependent Claim
35 words
The method defined in claim 3 wherein said first zinc coating is deposited from an alkaline zincate solution and has a thickness within the range of about 1.0 to about 3.0 in. X 10 6.
Claim 6
Dependent Claim
35 words
The method defined in claim 4 wherein said copper coating is deposited electrolytically from a copper cyanide solution and has a thickness within the range of about 14 to about 16 in. X 10 6.
Claim 7
Dependent Claim
36 words
The method defined in claim 5 wherein said nickel coating is electrolytically deposited from a nickel chloride-nickel sulfate solution and has a thickness within the range of about 9 to about 11 in. X 10 6.
Claim 8
Dependent Claim
36 words
The method defined in claim 6 wherein the second zinc coating is deposited electrolytically from a zinc sulfate solution and has a thickness within the range of about 18 to about 22 in. X 10 6.
Claim 9
Dependent Claim
38 words
The method defined in claim 7 comprising the further step of contacting the treated material with an acidic solution containing at least one hexavalent chromium compound whereby said treated material is rendered tarnish and corrosion resistant during storage.
Claim 10
Dependent Claim
13 words
The method defined in claim 8 wherein said acidic solution comprises chromic acid.
Claim 11
Independent Claim
132 words
A METHOD OF SIMULTANEOUSLY RENDERING SOLDERABLE AND PROTECTED AGAINST GALVANIC CORROSION AT LEAST ONE SURFACE OF A BODY SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM BASE ALLOY BODIES, TO WHICH A NICKEL COAT WILL NOT ADHERE, COMPRISING THE STEPS OF: A. TREATING SAID SURFACE WITH AN ALKALINE SOLUTION TO CLEAN AND ETCH IT, B. TREATING SAID SURFACE WITH AN ACIDIC SOLUTION TO DESMUT IT, C. DEPOSITING ON SAID SURFACE AN ADHERENT BASE SYSTEM, WHICH PROMOTES ADHESION BETWEEN SAID SURFACE AND A SUBSEQUENTLY APPLIED NICKEL COAT, D. DEPOSITING ON SAID ADHERENT BASE SYSTEM A NICKEL COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 2.0 TO ABOUT 200 IN.X10**6, AND E. DEPOSITING ON SAID NICKEL COAT A ZINCC COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 1.0 TO ABOUT 200IN.X10**6.
Claim 12
Independent Claim
132 words
A METHOD OF SIMULTANEOUSLY RENDERING SOLDERABLE AND PROTECTED AGAINST GALVANIC CORROSION AT LEAST ONE SURFACE OF A BODY SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM BASE ALLOY BODIES, TO WHICH A NICKEL COAT WILL NOT ADHERE, COMPRISING THE STEPS OF: A. TREATING SAID SURFACE WITH AN ALKALINE SOLUTION TO CLEAN AND ETCH IT, B. TREATING SAID SURFACE WITH AN ACIDIC SOLUTION TO DESMUT IT, C. DEPOSITING ON SAID SURFACE AN ADHERENT BASE SYSTEM, WHICH PROMOTES ADHESION BETWEEN SAID SURFACE AND A SUBSEQUENTLY APPLIED NICKEL COAT, D. DEPOSITING ON SAID ADHERENT BASE SYSTEM A NICKEL COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 2.0 TO ABOUT 200 IN.X10**6, AND E. DEPOSITING ON SAID NICKEL COAT A ZINCC COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 1.0 TO ABOUT 200IN.X10**6.
Claim 13
Dependent Claim
53 words
The method defined in claim 10 wherein said adherent base system comprises a first coat of zinc having a thickness within the range of about 0.5 to 5.0 in. X 10 6, and a second coat of copper having a thickness within the range of about 5 to 200 in. X 10 6.
Claim 14
Dependent Claim
80 words
The method defined in claim 11 wherein the thickness of the metal coats deposited in steps (d) and (e) fall within the ranges of about 9.0 to about 11.0 in. X 10 6; and about 18.0 to about 22.0 in. X 10 6, respectively, and the thickness of said first zinc and second copper coats fall within the ranges of about 1.0 to about 3.0 in. X 10 6, and about 14.0 to about 16.0 in. X 10 6, respectively.
Claim 15
Dependent Claim
45 words
The method defined in claim 12 further comprising the steps of rinsing the zinc coat deposited in step (e) and then depositing on said zinc plate a chromate coat whereby the treated surface of said aluminum alloy is rendered tarnish and corrosion resistant during storage.
Claim 16
Dependent Claim
19 words
The method defined in claim 10 wherein each of steps a-e inclusive is followed by a water rinse. 6.
Claim 17
Dependent Claim
94 words
AS AN ARTICLE OF MANUFACTURE, A BODY FORMED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM BASE ALLOYS TO WHICH A NICKEL COAT WILL NOT ADHERE, SAID BODY HAVING AT LEAST ONE SOLDERABLE, GALVANICCORROSION RESISTANT SURFACE DEFINED BY SUPERPOSED LAYERS OF AN ADHERENT BASE SYSTEM WHICH PROMOTES ADHESION BETWEEN SAID SURFACE AND A SUBSEQUENTLY APPLIED NICKEL COAT, A NICLEL COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 9 TO ABOUT 11 IN.X10**6, AND A ZINC COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 18.0 TO ABOUT 22.0 IN.X10**6.
Claim 18
Dependent Claim
94 words
AS AN ARTICLE OF MANUFACTURE, A BODY FORMED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM BASE ALLOYS TO WHICH A NICKEL COAT WILL NOT ADHERE, SAID BODY HAVING AT LEAST ONE SOLDERABLE, GALVANICCORROSION RESISTANT SURFACE DEFINED BY SUPERPOSED LAYERS OF AN ADHERENT BASE SYSTEM WHICH PROMOTES ADHESION BETWEEN SAID SURFACE AND A SUBSEQUENTLY APPLIED NICKEL COAT, A NICLEL COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 9 TO ABOUT 11 IN.X10**6, AND A ZINC COAT HAVING A THICKNESS WITHIN THE RANGE OF ABOUT 18.0 TO ABOUT 22.0 IN.X10**6.
Claim 19
Dependent Claim
47 words
The article defined in claim 15 wherein said adherent base system comprises a first zinc coat and a second copper coat of thicknesses within the ranges of about 1.0 to about 3.0 in. X 10 6 and about 14 to about 16 in. X 10 6, respectively.
Claim 20
Dependent Claim
17 words
The article defined in claim 15 wherein said outermost zinc coat has a chromate coat deposited thereon.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |