| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treatment material for a heat exchanger capable of satisfying both of hydrophilic and color preserving properties in one-layered film configuration. SOLUTION: A hydrophilic color coating in which a pigment is dispersed in a base material organic compound including a hydrophilicity-imparting material, is formed on an upper layer of a base material composed of aluminum or aluminum alloy. Preferably, a pigment coated with an organic compound is dispersed in the base material organic compound with the hydrophilicity-imparting material, placed on the upper layer of the base material composed of aluminum or aluminum alloy, and baked to form the hydrophilic color coating. Zr of 5 to 15 % is preferably included in the coating. Thus the surface treatment material having superior hydrophilic property and the color preserving property though it is one-layered coating, having corrosion resistance approximately equal to that of a conventional two-layered coating, and having superior color reserving property and the hydrophilic property can be prepared at a low cost. COPYRIGHT: (C)2006,JPO&NCIPI
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