High purity aluminum foils are the key raw materials of high voltage electrolytic capacitors. Since the aluminum foils for high voltage anode materials were subjected to DC electrochemical etching, tunnel growth of etch pits with the <100>crystallographic grain during corrosion were achieved, which were required for high capacitance, thus the large volume fraction of cube texture in the aluminum foils is the prerequisite to obtain high capacitance. To obtain the stronger cube texture {001}<100>, the researc...