Surface treatment method for pure aluminum plate material
AssigneeDaikin Industries, Ltd.
InventorsHiraku Kawasaki, Shinichirou Kobayashi
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Abstract
The present invention reduces the expense of treating the surfaces of a plate material. This surface treatment method treats the surfaces of a plate material that is rolled with rolling oil and employed as a cooling fin of a heat exchanger, and includes a preparation step and a coating application step. In the preparation step, the plate material is prepared. In the coating application step, a coating is applied to the surface of the plate material without carrying out a degreasing treatment.
Claims19
A method of treating a surface of a pure aluminum plate material that is rolled with rolling oil, the method comprising the steps of:
- providing the pure aluminum plate material for coating;
- and
- coating surfaces of the pure aluminum plate material with a corrosion resistant coating without carrying out a degreasing treatment, and
- coating the surfaces of the pure aluminum plate material with a hydrophilic coating.
The method of treating the surface of the pure aluminum plate material set forth in clam 1, wherein
- in the corrosion resistant coating step the surface of the pure aluminum plate material is coated without carrying out a surface roughing treatment.
A method of treating a surface of a pure aluminum plate material comprising the steps of:
- unrolling a rolled pure aluminum plate material from a first roller toward a second roller in a first direction;
- applying the pure aluminum plate material with a corrosion resistant coating as the pure aluminum plate material moves in the first direction without degreasing the pure aluminum plate material;
- heating the rolled pure aluminum plate material in a first heating step to dry the corrosion resistant coating as the pure aluminum plate material moves in the first direction;
- reversing the direction of the pure aluminum plate material such that the pure aluminum plate material moves from the second roller back to the first roller in a second direction;
- applying the rolled pure aluminum plate material with a second coating as the pure aluminum plate material moves in the second direction;
- and
- heating the rolled pure aluminum plate material in a second heating step to dry the second coating as the pure aluminum plate material moves in the second direction.
Dependencies are inferred from the claim text.