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- W2055358114 abstract "Elektrolytische Gleichstrom-Tunnelätzung von Aluminiumfolie in wäßriger Chloridlösung ist das effektivste Verfahren zur Herstellung hochwertiger Anodenfolien für Hochvolt-Elektrolyt-Kondensatoren. Überraschenderweise ergibt auch die klassische elektrochemische Methode der Ermittlung potentiostatischer Strom-Zeitkurven an rekristallisierter Reinst-Aluminiumfolie in einem begrenzten Potentialbereich in der Umgebung des Lochfraßpotentials eine reine Tunnelätzung. Potentiostatische Strom-Zeitkurven widerspiegeln die Dynamik der sehr schnell und an einer bereits geätzten Folie nicht wiederholbar ablaufenden Tunnelbildung (Tunneldurchmesser etwa 0,2 μm; Tunnellänge 10–100 μm) und der zeitlich daran anschließenden etwa 1000fach langsameren und im Existenzbereich der Passivstromdichte steuerbaren Tunnelerweiterung. Electrolytic tunnel etching of aluminium foil The most effective method of etching aluminum foil for high voltage electrolytic capacitors is the electrolytic tunnel etching with direct current in an aqueous solution of chloride salts. Surprisingly the classical electrochemical method for determining the potentiostatic current-time curves of annealed high purity aluminum foil delivers a pure tunnel etching in a narrow range around the pitting potential. The potentiostatic current-time curves show the dynamic of the very fast and on an already etched aluminum foil not repeatable process of forming the tunnels (tunnel diameter ca. 0.2 μm; tunnel length 10–100 μm) and immediate after tunnel formation the about 1000 times slower and controllable process of widening these tunnels in the region of passivation current density." @default.
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- W2055358114 date "1982-03-01" @default.
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- W2055358114 title "Elektrolytische Tunnelätzung von Aluminiumfolie" @default.
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- W2055358114 doi "https://doi.org/10.1002/maco.19820330305" @default.
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