Electro-dissolution kinetics of swept-frequency voltage modulation on the polarization of high-purity aluminum

摘要

In producing low-voltage aluminum electrolytic capacitors, to increase the surface area of the high-purity aluminum foil, AC electrochemical etching with mixture Cl~- solution is commonly used. In recent years, variable-frequency voltage modulation, instead of constant-frequency AC voltage modulation, is used on the anodic dissolution of high-purity aluminum foil as an advanced technology. Although it has been used for years by some manufacturers, the kinetics of this technology are not yet well understood.