Attaque anodique de l'aluminium en milieu chlorure II. Étude de la réversibilité de la rupture de passivité

Rais, A.; Guitton, J.; Bertoncelli, B.; Spender, P.; Buttoudin, R.

doi:10.1016/0376-4583(79)90016-5

Surface Technology

1979

DOI: 10.1016/0376-4583(79)90016-5

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Attaque anodique de l'aluminium en milieu chlorure II. Étude de la réversibilité de la rupture de passivité

A. Rais

J. Guitton

B. Bertoncelli

et al.

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1982

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Elektrolytische Tunnelätzung von Aluminiumfolie

Fickelscher

1982

Materials & Corrosion

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Elektrolytische Gleichstrom-Tunnelatzung von Aluminiumfolie in waariger Chlondlosung ist das effektivste Verfahren zur Herstellung hochwertiger Anodenfolien fur Hochvolt-Elektrolyt-Kondensatoren. Uberraschenderweise ergibt auch die klassische elektrochemische Methode der Ermittlung potentiostatischer Strom-Zeitkurven an rekristallisierter Reinst-Aluminiumfolie in einem begrenzten Potentialhereich in der Umgebung des Lochfraapotentials eine reine Tunnelatzung. Potentiostatische Strom-Zeitkurven widerspiegeln die Dynamik der sehr schnell und an einer bereits geatzten Folie nicht wiederholbar ablaufenden Tunnelbildung (Tunneldurchmesser etwa 0,2 pm; Tunnellange 10-100 pm) und der zeitlich daran anschlieaenden etwa lOOOfach langsameren und im Existenzbereich der Passivstromdichte steuerharen Tunnelerweiterung.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 currenttime 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 pm; tunnel length 10-100 ym) and immediate after tunnel formation the about 1000 times slower and controllable process of widening these tunnels in the region of passivation current density.

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Elektrolytische Tunnelätzung von Aluminiumfolie

Fickelscher

1982

Materials & Corrosion

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Attaque anodique de l'aluminium en milieu chlorure II. Étude de la réversibilité de la rupture de passivité

Cited by 1 publication

References 8 publications

Elektrolytische Tunnelätzung von Aluminiumfolie

Elektrolytische Tunnelätzung von Aluminiumfolie

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