| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite surface treatment method with less environmental load by which the primary and secondary treatments can be performed by one process as a whole, thereby enhancing working efficiency, and also slidability, hardness, wear resistance, heat radiation, heat resistance, heat conductivity and the like can be enhanced compared with heretofore and aluminum and aluminum alloy treated with a surface treated solution. SOLUTION: A polyimide resin composite coating film having polyimide with which a pores formed on the surface of a workpiece is impregnated is formed by using a bath liquid consisting of an aqueous solution containing sulfuric acid, nickel sulfate and a polyimide emulsion, and applying a direct-current electricity to the workpiece consisting of aluminum or an aluminum alloy as an anode in the bath liquid. COPYRIGHT: (C)2009,JPO&INPIT
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