| 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 tab terminal 1 are dipped into an electrolytic bath and are subjected to electrolytic polishing and then the flat part 3 and the round rod part 2 are dipped into a formation bath containing 3 wt.% aqueous ammonium adipate maintained at 85 + or -1 deg.C for performing formation treatment, thus smoothing the surface of the round rod part, preventing the electrolyte for drive inside the through hole of a rubber hole sealed body from leaked, and obtaining a reliable electrolytic capacitor. |
