| 摘要 |
<p>A thermoplastic resin-coated aluminum alloy plate having so high a processing adhesion that the laminated thermoplastic resin layer is not separated therefrom even when the plate is subjected to a severe forming process in which the plate is deep-drawn, stretched and then ironed. A process and an apparatus for producing the same are also disclosed. An aluminum alloy plate is treated with an alkali solution and an acid solution in order so as to put the surface of the plate in a special condition. The resultant plate is subjected to anodic electrolysis using a direct current in an acid solution containing one or more of inorganic acid, such as sulfuric acid and an organic acid, such as carboxylic acid or hydroxy carboxylic acid. Alternatively, the resultant plate is subjected to a treatment using hot water of above 60 °C, boiling water, or water vapor so as to form a uniform hydration oxide film of 2-10 nm in thickness. The alloy plate is coated with a thermoplastic resin. This enables the thermoplastic resin-coated aluminum alloy plate to have so high a processing adhesion that permits the plate to withstand a severe forming process.</p> |
