摘要 |
PURPOSE:To smooth a round rod part and to improve the engagement with the through hole inner wall surface of a rubber hole sealed body by performing electrolytic polishing and chemical treatment of the round rod part of a tab terminal. CONSTITUTION:A tab terminal 1 for electrolytic capacitor consisting of a round rod part 2 of aluminum, a flat part 3 of aluminum, and a leading wire 4 welded to the round rod part 2 is manufactured. Then, the flat part 3 and the round rod part 2 of the terminal 1 are dipped into a chemical polishing bath and are subjected to chemical polishing and then the flat part 3 and the round rod part 2 are dipped into a formation both containing 3 wt.% aqueous ammonium adipate maintained at 85+ or -1 for performing formation treatment, thus preventing the internal electrolyte for drive from leaked and obtaining a reliable electrolytic capacitor. |