| abstract |
A method for producing an electrode for an aluminum electrolytic capacitor capable of preventing the porous layer from being destroyed during the thermal depolarization treatment even when an aqueous solution of ammonium adipate is used for the formation of the porous aluminum electrode. To provide. A porous aluminum electrode has a porous layer formed by sintering aluminum powder on the surface of an aluminum core material. When the porous aluminum electrode 10 is formed to a voltage of 200 V or higher, after the pure water boiling, the first chemical conversion treatment is performed in the aqueous solution of ammonium adipate having a liquid temperature of 80 ° C. or lower, and in the boric acid aqueous solution. A second chemical conversion process for performing chemical conversion is performed. In addition, when the thermal depolarization process is first performed, a water washing process of 5 minutes or more is performed before the thermal depolarization process. [Selection] Figure 1 |