| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-treated aluminum material in which an anodic oxidation film is formed on the surface, and excellent in ultraviolet reflection properties and corrosion resistance, and further, to provide an ultraviolet reflection member made of the surface-treated aluminum material in which an anodic oxidation film is formed on the surface, having excellent ultraviolet reflectivity and corrosion resistance and suitably used in various apparatus and devices.SOLUTION: Provided is a surface-treated aluminum material in which the surface of an aluminum material is provided with an anodic oxidation film. The anodic oxidation film is formed by fixed voltage anodic oxidation treatment under the voltage of 10 to 30 V using an oxalic acid electrolytic solution, further, after the anodic oxidation treatment, sealing treatment is performed thereto, further, its reflection rate to ultraviolet light with a wavelength of 254 nm is 50% or higher, and the average reflection rate to ultraviolet light with a wavelength in the range of 200 to 400 nm is 70% or higher. |
