The Effect of Aluminum Ion on the D.C.Etching of the Aluminum Foil for Electrolyte Capacitors.

摘要

Electrochemical etching of aluminum foils is widely used in the manufacture of electrolytic capacitor electrodes.It results in an enlargement of the surface area and in an increased capacitance per volume.The anodic dissolution of high-purity aluminum foil etched with direct current in aqueous chloride solution above 60 deg C produces a high density (10~5 approx 10~8 /cm~2 of metal surface) of microscopic corrosion tunnels.