Claims
- 1. An improved method of producing low voltage aluminum electrolytic capacitor foil having high gain and high energy efficiency, including the steps of etching said foil and cleaning said foil in a cold deionized water bath, wherein the improvement comprises the steps of:
- immersing said foil immediately after said cleaning in a second deionized water bath having a temperature of from 40.degree. C. to 65.degree. C. for a period of from 15 minutes to 30 seconds, depending on the temperature of said bath, said second deionized water bath containing no passivators, to produce a hydrate on the surface of said foil,
- drying said foil and
- forming said foil at effective formation voltages ranging from 10 volts to 190 volts in a bath comprising a dicarboxylic acid.
- 2. The method of claim 6 wherein the temperature of the second water bath is about 40.degree. C.-60.degree. C.
- 3. An aluminum foil for low voltage electrolytic capacitor use produced by the process of claim 1.
Parent Case Info
This is a continuation of application Ser. No. 582,191, filed Feb. 21, 1984, now abandoned.
US Referenced Citations (5)
Continuations (1)
|
Number |
Date |
Country |
Parent |
582191 |
Feb 1984 |
|