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Aluminum alloy with high seawater corrosion resistance and plate-fin heat exchanger
US9365931B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9365931-B2 |
| Application number | US-85272107-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 10, 2007 |
| Priority date | Dec 1, 2006 |
| Publication date | Jun 14, 2016 |
| Grant date | Jun 14, 2016 |
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- Title
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Abstract
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An aluminum alloy for use in a plate-fin heat exchanger having a heat transfer portion with seawater as a coolant includes an organic phosphonic acid underlying coating disposed on the surface of the aluminum alloy and a fluorocarbon resin coating disposed on the organic phosphonic acid underlying coating, the fluorocarbon resin coating having an average thickness of 1 to 100 μm after drying. The aluminum alloy has improved durability of coating adhesion and excellent seawater corrosion resistance.
First claim
Opening claim text (preview).
What is claimed is: 1. A plate-fin heat exchanger having excellent seawater corrosion resistance, comprising: a heat transfer portion composed of an aluminum alloy, wherein the heat transfer portion utilizes seawater as a coolant, wherein the aluminum alloy comprises: an organic phosphonic acid underlying coating disposed on the surface of the aluminum alloy; and a fluorocarbon resin coating disposed on the organic phosphonic acid underlying coating, wherein the organic phosphonic acid underlying coating and the fluorocarbon resin coating are covalently bonded, wherein the organic acid phosphonic acid underlying coating and the aluminum alloy are covalently bonded with a curing agent, wherein the fluorocarbon resin coating has an average thickness of 1 to 100 μm after drying. 2. The plate-fin heat exchanger according to claim 1 , wherein a fluorocarbon resin constituting the fluorocarbon resin coating is a trifluororesin. 3. The plate-fin heat exchanger according to claim 2 , wherein the trifluororesin is a chlorotrifluoroethylene/vinyl ether copolymer, and wherein fluorocarbon resin paint for the fluorocarbon resin coating is prepared by crosslinking the chlorotrifluoroethylene/vinyl ether copolymer with an isocyanate. 4. The plate-fin heat exchanger according to claim 1 , wherein the fluorocarbon resin coating does not contain a metal powder. 5. The plate-fin heat exchanger according to claim 3 , wherein the fluorocarbon resin coating does not contain a metal powder. 6. The plate-fin heat exchanger according to claim 1 , wherein the organic phosphonic acid underlying coating is composed of an organic phosphonic acid selected from methylphosphonic acid, ethylphosphonic acid, and vinylphosphonic acid. 7. The plate-fin heat exchanger according to claim 5 , wherein the organic phosphonic acid underlying coating is composed of an organic phosphonic acid selected from methylphosphonic acid, ethylphosphonic acid, and vinylphosphonic acid.
Assignees
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Classifications
Coating layer not in excess of 5 mils thick or equivalent · CPC title
of rubber; of plastics material; of varnish · CPC title
from aluminium or aluminium alloys · CPC title
- C23C28/00Primary
Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D · CPC title
Phosphonic acids · CPC title
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- What does patent US9365931B2 cover?
- An aluminum alloy for use in a plate-fin heat exchanger having a heat transfer portion with seawater as a coolant includes an organic phosphonic acid underlying coating disposed on the surface of the aluminum alloy and a fluorocarbon resin coating disposed on the organic phosphonic acid underlying coating, the fluorocarbon resin coating having an average thickness of 1 to 100 μm after drying. T…
- Who is the assignee on this patent?
- Ohwaki Takeshi, Kobayashi Nobuhiro, Noishiki Koji, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C23C28/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 14 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).