PURPOSE: To prevent deterioration of a hydrophilic property of a hydrophilic treatment fin material due to use of a volatile press oil and to obtain a surface- treated fin material having an excellent hydrophilic property even when the volatile press oil is used and no degreasing is conducted.
CONSTITUTION: A hydrophilic surface-treated aluminum fin material which is featured by that a hydrophilic film of silica series is provided as a first layer on the surface of aluminum and an aluminum alloy and a resin film coating layer containing Na salt or K salt of a polyacrylic acid of a polymerization degree of 1500 or above and Na salt or K salt of a polyacrylic acid of a polymerization degree of 400 or below in the range of a solid part ratio (1:10) to (1:0.1) is provided thereon in the range of 0.02 to 0.5μm, and which is excellent in a residual oil removing property. This material is excellent also in workability. Degreasing by a chloric solvent can be dispensed with without impairing the hydrophilic property which the surface-treated fin material has inherently.
| WO/2021/199876 | FIN MATERIAL FORMED OF ALUMINUM |
| JPS59122847 | HEAT EXCHANGER IN WATER HEATER |
| JP2005036254 | NON-CHROMIUM COATING TYPE ANTICORROSIVE FOR FIN MATERIAL, AND FIN MATERIAL |
MUKAI YOSHIKAZU
FUKUI MANABU
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