US4115604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum plating process
Assignee: Bremat SA
•
Filing: 1976-04-06
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Granted: 1978-09-19
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Expires: 1996-04-06
Abstract
Abstract Delamination of plating on aluminum, for example tin plating, is avoided by providing an intermediate alloy coating on the aluminum prior to its passage through a bath of molten tin or a tin alloy. The coating is applied by passing cleansed aluminum through to the plating thereof with a primary protective metal. The intermediate alloy coating alloy contains zinc, bismuth, cadmium, tin and lead.
Inventors
- 👤 Max Jeremie Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:00
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/06; C22; C22C; C22C18/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12736; Y10T428/12771; Y10T428/12785; Y10T428/12792
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
A process for the plating of an aluminum substrate comprising the steps of: cleaning the substrate; coating the cleansed substrate with a layer of an intermediate alloy comprising, by weight, 80 to 86% zinc, 6 to 13% bismuth, 2 to 8% cadmium, 1 to 5% tin and 0.1 to 1.5% lead by passing the substrate through a molten bath of the intermediate alloy; and plating an oxidation resistant metal having a fusion point which does not exceed that of tin and its alloys over the intermediate alloy layer by passing the coated substrate through a bath containing the oxidation resistant metal in molten form.
Claim 2
Dependent Claim
104 words
A process for the plating of an aluminum substrate comprising the steps of: cleaning the substrate; coating the cleansed substrate with a layer of an intermediate alloy comprising, by weight, 80 to 86% zinc, 6 to 13% bismuth, 2 to 8% cadmium, 1 to 5% tin and 0.1 to 1.5% lead by passing the substrate through a molten bath of the intermediate alloy; and plating an oxidation resistant metal having a fusion point which does not exceed that of tin and its alloys over the intermediate alloy layer by passing the coated substrate through a bath containing the oxidation resistant metal in molten form.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein the step of coating comprises: forming an alloy comprising zinc, bismuth, cadmium, tin and lead; and passing the cleansed aluminum substrate through a bath of the molten alloy.
Claim 4
Dependent Claim
47 words
The method of claim 2 wherein the step of forming the intermediate alloy comprises: producing a metal comprising, in percent by weight, zinc = 83.5 to 84.5% bismuth = 9 to 10% cadmium = 4 to 5% tin = 2 to 3% lead = 0.1 to 0.8%.
Claim 5
Dependent Claim
21 words
The method of claim 3 wherein the step of plating comprises: depositing a coating containing tin over the intermediate alloy layer.
Claim 6
Dependent Claim
40 words
The method of claim 2 wherein the step of cleaning the aluminum substrate comprises: drawing the substrate through a cleansing solution; and neutralizing the cleansing solution remaining on the surface of the substrate subsequent to removal from the cleansing solution.
Claim 7
Dependent Claim
25 words
The method of claim 5 wherein the steps of drawing through a cleaning solution, neutralizing, coating with the intermediate alloy and plating are performed continuously.
Claim 8
Dependent Claim
44 words
The method of claim 6 wherein the step of coating with the intermediate alloy further comprises: maintaining the temperature of the molten alloy while the aluminum substrate to be plated is passed therethrough; and maintaining the level of the molten alloy in the bath.
Claim 9
Dependent Claim
24 words
The method of claim 7 further comprising the steps of: cooling the coated aluminum substrate prior to plating; and cooling the plated aluminum substrate.
Claim 10
Dependent Claim
21 words
The method of claim 8 wherein the step of plating comprises: depositing a coating containing tin over the intermediate alloy layer.
Claim 11
Dependent Claim
44 words
The method of claim 2 wherein the step of coating with the intermediate alloy further comprises: maintaining the temperature of the molten alloy while the aluminum substrate to be plated is passed therethrough; and maintaining the level of the molten alloy in the bath.
Claim 12
Dependent Claim
24 words
The method of claim 2 further comprising the steps of: cooling the coated aluminum substrate prior to plating; and cooling the plated aluminum substrate.
Claim 13
Dependent Claim
21 words
The method of claim 1 wherein the step of plating comprises: depositing a coating containing tin over the intermediate alloy layer.
References Cited (Backward Citations)
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US3525598A
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US3681019A
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US3915667A
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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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |