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process for the production of aluminum foil for electrolytic capacitors and elektrolytkondensator from thus produced aluminum foil.
process for the production of aluminum foil for electrolytic capacitors and elektrolytkondensator from thus produced aluminum foil.
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机译:由如此生产的铝箔生产用于电解电容器和电解电容器的铝箔的方法。
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摘要
The feature is that Aluminium-foil receives first a satinising treatment in a chloride-soln. at about 90 deg.C. with an electrical bias consisting of a waveform with a frequency between 20 and 400 Hz and a duty-cycle of greater than 40%, pref. of 50%. The total amt. of charge used is low, pref. between 2 and 5 Coulomb/sq.cm. This treatment is followed by anodic etching of the foil in a suitable electrolyte using a bias consisting of pulses superimposed on a DC-bias or of a pulsed DC-bias. The pulses have pref. a polarity and amplitude which causes the etching to be periodically interrupted briefly and followed by a forming period. An electrolytic capacitor made using the foil prepd. as above is also claimed.
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