US4718482A
Expired / Lapsed
US
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Method for manufacturing heat exchange vehicle
Assignee: MA Aluminum Corp
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Filing: 1986-08-19
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Granted: 1988-01-12
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Expires: 2006-08-19
Abstract
Abstract A method for manufacturing a novel heat exchanging vehicle comprising the steps of forming an inorganic surface layer over a cold rolled, aluminum or aluminum alloy sheet; treating the inorganic surface layer with a phosphoric compound solution; annealing the sheet; and forming the sheet into a predetermined shape. The resulting heat exchanging vehicle such as a fin has a good wettability and a high corrosion resistance to white rust based on the uniformity of the said surface layer.
Inventors
- 👤 Tetsuji Iwama
- 👤 Katashi Katsumata
- 👤 Hajime Kudo
- 👤 Yo Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:52
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/084
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
66 words
A method for manufacturing a heat exchanging vehicle, comprising the steps of: (a) forming an inorganic surface layer over a cold-rolled sheet of aluminum or an aluminum alloy; (b) treating said inorganic surface layer with an aqueous solution containing a phosphoric compound to deposit said phosphoric compound on said inorganic surface layer; (c) annealing said sheet; and (d) forming said sheet into a heat exchanging vehicle.
Claim 2
Independent Claim
66 words
A method for manufacturing a heat exchanging vehicle, comprising the steps of: (a) forming an inorganic surface layer over a cold-rolled sheet of aluminum or an aluminum alloy; (b) treating said inorganic surface layer with an aqueous solution containing a phosphoric compound to deposit said phosphoric compound on said inorganic surface layer; (c) annealing said sheet; and (d) forming said sheet into a heat exchanging vehicle.
Claim 3
Dependent Claim
28 words
The method according to claim 1, wherein said cold-rolled sheet of aluminum or an aluminum alloy is an H1n-temper sheet wherein n represents 2, 4, 6 or 8.
Claim 4
Dependent Claim
22 words
The method according to claim 1, wherein said inorganic surface layer has a weight of about 0.2 to 1.0 g/m 2 .
Claim 5
Dependent Claim
16 words
The method according to claim 1, wherein said inorganic surface layer is covered with silicate compounds.
Claim 6
Dependent Claim
16 words
The method according to claim 1, wherein said inorganic surface layer is a hydrated surface layer.
Claim 7
Dependent Claim
20 words
The method according to claim 5, wherein said hydrated inorganic surface layer is covered with an extremely thin silicate layer.
Claim 8
Dependent Claim
16 words
The method according to claim 1, wherein said inorganic surface layer is an anodic-oxidation surface layer.
Claim 9
Dependent Claim
24 words
The method according to claim 7, wherein said anodic-oxidation inorganic surface layer having a good wettability is covered with an extremely thin silicate layer.
Claim 10
Dependent Claim
43 words
The method according to claim 1, wherein said phosphoric compound is selected from the group consisting of inorganic phosphoric, compounds inorganic phosphate esters, water-soluble salts of said inorganic phosphate esters, phosphonic acid compounds, water-soluble salts of said phosphonic acid compounds, and mixture thereof.
Claim 11
Dependent Claim
24 words
The method according to claim 1 wherein the weight of said inorganic surface layer is about 0.005 to 0.15 g/m 2 based on phosphorus.
Claim 12
Dependent Claim
21 words
The method according to claim 1, wherein said phosphoric compound aqueous solution contains at least 50 ppm of said phosphoric compound.
Claim 13
Dependent Claim
18 words
The method according to claim 1, wherein said solution containing said phosphoric compound additionally contains a nonionic surfactant.
Claim 14
Dependent Claim
18 words
The method according to claim 12, wherein the concentration of said nonionic surfactant is about 0.1 to 2%.
Claim 15
Dependent Claim
22 words
The method according to claim 1, wherein annealing is conducted at about 200° to 450° C. from 1 second to 20 hours.
Claim 16
Dependent Claim
21 words
The method according to claim 1, wherein said organic surface layer has a weight of 0.4 to 0.8 g/m 2 .
Claim 17
Dependent Claim
20 words
The method according to claim 1, wherein said phosphoric compound solution contains 1 to 20 ppm of said phosphoric compound.
Claim 18
Dependent Claim
20 words
The method according to claim 1, wherein annealing is conducted at 200° to 260° C. for 3 to 20 hours.
Claim 19
Dependent Claim
27 words
The method according to claim 1, wherein said aluminum or aluminum alloy sheet is an H2n- or O-temper sheet wherein n is 2, 4, 6 or 8.
Claim 20
Dependent Claim
63 words
A heat exchanging vehicle formed by the steps comprising: (a) forming an inorganic surface layer over a cold-rolled sheet of aluminum or an aluminum alloy; (b) treating said inorganic surface layer with an aqueous solution containing a phosphoric compound to deposit said phosphoric compound on said inorganic surface layer; (c) annealing said sheet; and (d) forming said sheet into a heat exchanging vehicle.
Claim 21
Dependent Claim
63 words
A heat exchanging vehicle formed by the steps comprising: (a) forming an inorganic surface layer over a cold-rolled sheet of aluminum or an aluminum alloy; (b) treating said inorganic surface layer with an aqueous solution containing a phosphoric compound to deposit said phosphoric compound on said inorganic surface layer; (c) annealing said sheet; and (d) forming said sheet into a heat exchanging vehicle.
Claim 22
Dependent Claim
29 words
The vehicle according to claim 19, wherein said cold-rolled sheet of an aluminum or an aluminum alloy is an H1n-temper sheet wherein n represents 2, 4, 6 or 8.
Claim 23
Dependent Claim
18 words
The vehicle according to claim 20, wherein said solution containing said phosphoric compound additionally contains a nonionic surfactant.
Claim 24
Dependent Claim
19 words
The vehicle according to claim 21, wherein said nonionic surfactant is at a concentration of about 0.1 to 2%.
Claim 25
Dependent Claim
22 words
The vehicle according to claim 19, wherein said inorganic surface layer has a weight of about 0.2 to 1.0 g/m 2 .
Claim 26
Dependent Claim
16 words
The vehicle according to claim 19, wherein said inorganic surface layer is covered with silicate compounds.
Claim 27
Dependent Claim
16 words
The vehicle according to claim 19, wherein said inorganic surface layer is a hydrated surface layer.
Claim 28
Dependent Claim
20 words
The vehicle according to claim 25, wherein said hydrated inorganic surface layer is covered with an extremely thin silicate layer.
Claim 29
Dependent Claim
16 words
The vehicle according to claim 15, wherein said inorganic surface layer is an anodic-oxidation surface layer.
Claim 30
Dependent Claim
20 words
The vehicle according to claim 27, wherein said anodic-oxidation inorganic surface layer is covered with an extremely thin silicate layer.
Claim 31
Dependent Claim
44 words
The vehicle according to claim 17, wherein said phosphoric compound is selected from the group consisting of inorganic phosphoric compounds, inorganic phosphate esters, water-soluble salts of said inorgranic phosphate esters, phosphonic acid compounds and water-soluble salts of said phosphonic acid compounds and mixtures thereof.
Claim 32
Dependent Claim
24 words
The vehicle according to claim 19, wherein the weight of said inorganic surface layer is about 0.005 to 0.15 g/m 2 based on phosphorus.
Claim 33
Dependent Claim
21 words
The vehicle according to claim 19, wherein said phosphoric compound aqueous solution contains at least 50 ppm of said phosphoric compound.
Claim 34
Dependent Claim
24 words
The vehicle according to claim 19, wherein said annealing is carried out at about 200° to 450° C. for 1 second to 20 hours.
Claim 35
Dependent Claim
29 words
The vehicle according to claim 19, wherein said aluminum or aluminum alloy sheet after annealing is an H2n- or O-temper sheet wherein n is 2, 4, 6 or 8.
Claim 36
Dependent Claim
21 words
The vehicle according to claim 19, wherein said organic surface layer has a weight of 0.4 to 0.8 g/m 2 .
Claim 37
Dependent Claim
21 words
The vehicle according to claim 19, wherein said phosphoric compound aqueous solution contains 1 to 20 ppm of said phosphoric compound.
Claim 38
Dependent Claim
21 words
The vehicle according to claim 19, wherein said annealing is conducted at 200° to 360° C. for 3 to 20 hours.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
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