US5356723A
Expired / Lapsed
US
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Multilayer plated aluminum sheets
Assignee: Nippon Steel Corp
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Filing: 1992-12-17
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Granted: 1994-10-18
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Expires: 2012-12-17
Abstract
Abstract A multilayer plated aluminum sheet suitable for use in automobile body panels comprises a base aluminum sheet made of aluminum or an aluminum alloy and has a first layer of zinc or a zinc alloy formed by displacement plating on the surface of the aluminum sheet and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic bath. Preferably, the upper electroplated coating comprises at least one layer of zinc or a zinc alloy and the uppermost layer of the coating is formed from a metallic material having a melting point above 500 DEG C.
Inventors
- 👤 Masanari Kimoto
- 👤 Tetsuaki Tsuda
- 👤 Masanori Tsuji
- 👤 Yoshihiko Hoboh
- 👤 Hiroshi Ikeda
- 👤 Takao Aimu
- 👤 Hideyuki Uto
- 👤 Kiyoyuki Fukui
- 👤 Keizo Namba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:05
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12771; Y10T428/12785; Y10T428/12792
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
101 words
A multilayer plated aluminum sheet suitable for use in automobile body panels, comprising an aluminum sheet made of aluminum or an aluminum alloy, the aluminum sheet having a first layer of pure zinc or a zinc-base alloy formed by displacement plating on the surface of the aluminum sheet, and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic sulfate bath, at least one layer of the electroplated coating being a pure zinc or zinc-base alloy and either the first layer or one layer of the electroplated coating or both being a zinc-base alloy.
Claim 2
Dependent Claim
101 words
A multilayer plated aluminum sheet suitable for use in automobile body panels, comprising an aluminum sheet made of aluminum or an aluminum alloy, the aluminum sheet having a first layer of pure zinc or a zinc-base alloy formed by displacement plating on the surface of the aluminum sheet, and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic sulfate bath, at least one layer of the electroplated coating being a pure zinc or zinc-base alloy and either the first layer or one layer of the electroplated coating or both being a zinc-base alloy.
Claim 3
Dependent Claim
21 words
The multilayer plated aluminum sheet of claim 1, wherein the first layer has a coating weight of 0.1-5 g/m 2 .
Claim 4
Dependent Claim
21 words
The multilayer plated aluminum sheet of claim 2, wherein the first layer has a coating weight of 0.2-1.0 g/m 2 .
Claim 5
Dependent Claim
25 words
The multilayer plated aluminum sheet of claim 1, wherein the first layer is a zinc-base alloy with one or more alloying elements nobler than zinc.
Claim 6
Dependent Claim
27 words
The multilayer plated aluminum sheet of claim 4, wherein the one or more alloying elements are selected from the group consisting of Ni, Fe, Co, and Cr.
Claim 7
Dependent Claim
25 words
The multilayer plated aluminum sheet of claim 1, wherein each layer of the upper electroplated coating has a coating weight of 0.1-40 g/m 2 .
Claim 8
Dependent Claim
23 words
The multilayer plated aluminum sheet of claim 6, wherein the coating weight of each electroplated layer is at least 0.5 g/m 2 .
Claim 9
Dependent Claim
23 words
The multilayer plated aluminum sheet of claim 7, wherein the coating weight of each electroplated layer is at least 1 g/m 2 .
Claim 10
Dependent Claim
45 words
The multilayer plated aluminum sheet of claim 1, wherein the zinc-base alloy which forms at least one layer of the upper electroplated coating is a zinc-base alloy with one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr, and Mn.
Claim 11
Dependent Claim
30 words
The multilayer plated aluminum sheet of claim 1, wherein the uppermost layer of the upper electroplated coating is formed from a metallic material having a melting point above 500° C.
Claim 12
Dependent Claim
59 words
The multilayer plated aluminum sheet of claim 10, wherein the metallic material having a melting point above 500° C. is selected from zinc-base alloys with one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr, and Mn, or a metal selected from the group consisting of Fe, Ni, Cr, Co, Ti and alloys thereof.
Claim 13
Dependent Claim
21 words
The multilayer plated aluminum sheet of claim 10, wherein the uppermost layer has a coating weight of 1-40 g/m 2 .
Claim 14
Dependent Claim
14 words
An automobile body panel made of the multilayer plated aluminum sheet of claim 10.
Claim 15
Dependent Claim
14 words
An automobile body panel made of the multilayer plated aluminum sheet of claim 1.
Claim 16
Dependent Claim
122 words
A multilayer plated aluminum sheet suitable for use in automobile body panels, comprising an aluminum sheet made of aluminum or an aluminum alloy, the aluminum sheet having a first layer of pure zinc or a zinc-base alloy formed by displacement plating on the surface of the aluminum sheet, and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic sulfate bath, at least one layer of the electroplated coating being a pure zinc or zinc-base alloy having one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr and Mn, the uppermost layer of the upper electroplated coating being formed from a metallic material having a melting point above 500° C.
Claim 17
Dependent Claim
122 words
A multilayer plated aluminum sheet suitable for use in automobile body panels, comprising an aluminum sheet made of aluminum or an aluminum alloy, the aluminum sheet having a first layer of pure zinc or a zinc-base alloy formed by displacement plating on the surface of the aluminum sheet, and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic sulfate bath, at least one layer of the electroplated coating being a pure zinc or zinc-base alloy having one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr and Mn, the uppermost layer of the upper electroplated coating being formed from a metallic material having a melting point above 500° C.
Claim 18
Dependent Claim
21 words
The multilayer plated aluminum sheet of claim 15, wherein the first layer has a coating weight of 0.1-5 g/m 2 .
Claim 19
Dependent Claim
21 words
The multilayer plated aluminum sheet of claim 16, wherein the first layer has a coating weight of 0.2-1.0 g/m 2 .
Claim 20
Dependent Claim
25 words
The multilayer plated aluminum sheet of claim 15, wherein the first layer is a zinc-base alloy with one or more alloying elements nobler than zinc.
Claim 21
Dependent Claim
27 words
The multilayer plated aluminum sheet of claim 18, wherein the one or more alloying elements are selected from the group consisting of Ni, Fe, Co, and Cr.
Claim 22
Dependent Claim
25 words
The multilayer plated aluminum sheet of claim 15, wherein each layer of the upper electroplated coating has a coating weight of 0.1-40 g/m 2 .
Claim 23
Dependent Claim
23 words
The multilayer plated aluminum sheet of claim 20, wherein the coating weight of each electroplated layer is at least 0.5 g/m 2 .
Claim 24
Dependent Claim
23 words
The multilayer plated aluminum sheet of claim 21, wherein the coating weight of each electroplated layer is at least 1 g/m 2 .
Claim 25
Dependent Claim
59 words
The multilayer plated aluminum sheet of claim 15, wherein the metallic material having a melting point above 500° C. is selected from zinc-base alloys with one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr, and Mn, or a metal selected from the group consisting of Fe, Ni, Cr, Co, Ti and alloys thereof.
Claim 26
Dependent Claim
21 words
The multilayer plated aluminum sheet of claim 15, wherein the uppermost layer has a coating weight of 1-40 g/m 2 .
Claim 27
Dependent Claim
114 words
An automobile body panel, comprising an aluminum sheet made of aluminum or an aluminum alloy, the aluminum sheet having a first layer of pure zinc or a zinc-base alloy formed by displacement plating on the surface of the aluminum sheet, and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic sulfate bath, at least one layer of the electroplated coating being a pure zinc or zinc-base alloy having one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr and Mn, the uppermost layer of the upper electroplated coating being formed from a metallic material having a melting point above 500° C.
Claim 28
Dependent Claim
114 words
An automobile body panel, comprising an aluminum sheet made of aluminum or an aluminum alloy, the aluminum sheet having a first layer of pure zinc or a zinc-base alloy formed by displacement plating on the surface of the aluminum sheet, and one or more layers of electroplated coating formed on the first layer by electroplating in an acidic sulfate bath, at least one layer of the electroplated coating being a pure zinc or zinc-base alloy having one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr and Mn, the uppermost layer of the upper electroplated coating being formed from a metallic material having a melting point above 500° C.
Claim 29
Dependent Claim
20 words
The automobile body panel of claim 25, wherein the first layer has a coating weight of 0.1-5 g/m 2 .
Claim 30
Dependent Claim
20 words
The automobile body panel of claim 26, wherein the first layer has a coating weight of 0.2-1.0 g/m 2 .
Claim 31
Dependent Claim
24 words
The automobile body panel of claim 25, wherein the first layer is a zinc-base alloy with one or more alloying elements nobler than zinc.
Claim 32
Dependent Claim
26 words
The automobile body panel of claim 28, wherein the one or more alloying elements are selected from the group consisting of Ni, Fe, Co, and Cr.
Claim 33
Dependent Claim
24 words
The automobile body panel of claim 25, wherein each layer of the upper electroplated coating has a coating weight of 0.1-40 g/m 2 .
Claim 34
Dependent Claim
22 words
The automobile body panel of claim 30, wherein the coating weight of each electroplated layer is at least 0.5 g/m 2 .
Claim 35
Dependent Claim
22 words
The automobile body panel of claim 31, wherein the coating weight of each electroplated layer is at least 1 g/m 2 .
Claim 36
Dependent Claim
58 words
The automobile body panel of claim 25, wherein the metallic material having a melting point above 500° C. is selected from zinc-base alloys with one or more alloying elements selected from the group consisting of Ni, Fe, Co, Cr, and Mn, or a metal selected from the group consisting of Fe, Ni, Cr, Co, Ti and alloys thereof.
Claim 37
Dependent Claim
20 words
The automobile body panel of claim 25, wherein the uppermost layer has a coating weight of 1-40 g/m 2 .
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |