| 摘要 |
PURPOSE:To form a fine striped pattern similar to straight grain of wood by etching an Al alloy plate contg. a specified amount of V, Cr or B and a specified amount of Si as essential componenets and by anodically oxidizing the etched plate. CONSTITUTION:An Al alloy contg. 0.5-2.5% V, 0.5-2.5% Cr or 0.5-2.0% B and 1.7-5.5% Si as essential componenets is cast into an ingot. This ingot is homogenized, hot rolled, and cold rolled. The resulting Al alloy plate is etched by 0.25-0.70g/dm<2> extent of dissolution by treatment with an aqueous NaOH soln. having 20% concn. at 45 deg.C for 5min. The etched plate is neutralized with acid, washed, and anodically oxidized in an aqueous H2SO4 soln. having 15% concn. at 20 deg.C for 40min. A dark- or light-gray clear striped pattern similar to straight grain of wood appears on the surface of the Al alloy plate.
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