| 摘要 |
PURPOSE:To obtain a film which has a high-reliable corrosion resistance and an excellent selective absorption, by a method wherein, after a heat collector, having a part where distinct types of metals producing a potential difference make contact with each other, is immersed in a paint for coating, a spray coating is conducted thereon. CONSTITUTION:Using a paint, containing as a pigment at least 1 type of metalic oxide selected from a group of Fe, Mn, Cu, Cr, Co, Ni, or a composite oxide, a heat collector, having a part where distinct types of metals producing a potential difference of 500mV or more make contact with each other, is immersed and is spray-coated to form a selection absorptive film with a total film thickness of 5mum or less. Finally, if the total film thickness exceeds 5mum, a selection absorptive property deteriorates. |
