| 摘要 |
PROBLEM TO BE SOLVED: To provide a fin material having a sufficient hydrophilic property and capable of maintaining its effect sufficiently long, particularly, an aluminum fin material for a heat exchanger. SOLUTION: This fin material is provided by coating a base material surface with a hydrophilic composition. The fin material is characterized in that in a coating surface, the maximum height Rmax of a projection is set to 0.1μm-2μm, and a contact angle to water in any before and after being soaked in water of 30°C for 500 hours, is set to 15°C or below. COPYRIGHT: (C)2009,JPO&INPIT
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