Treating etched aluminum electrolytic capacitor foil

Details Treating etched aluminum electrolytic capacitor foil Treating etched aluminum electrolytic capacitor foil

C - Chemistry, Metallurgy

25

D

204/17, 204/86.5

C25D 5/44 (2006.01) C25D 11/16 (2006.01) H01G 9/04 (2006.01)

Patent

CA 1156598

TREATING ETCHED ALUMINUM ELECTROLYTIC CAPACITOR FOIL Abstract of the Disclosure Aluminum electrolytic capacitor foil is treated prior to anodization in a two-step process. In the first step the foil is immersed in boiling water to form an appropriate thickness of hydrous oxide. In the second step the foil is immersed in a boiling aqueous solution containing phosphate, silicate, or tartrate ions, or combinations thereof. This two-step treatment results in a decreased power consumption during anodization and produces a film having higher film capacitance.

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