Title: Etching technique of anode Al foil of electrolysis capacitor
Application Number: 94118454 Application Date: 1994.12.01
Publication Number: 1106475 Publication Date: 1995.08.09
Approval Pub. Date: Granted Pub. Date: 1997.05.07
International Classifi-cation: C23G1/12,C25F3/04,H01G13/00
Applicant(s) Name: Xi'an Communications Univ. Address: 710049
Inventor(s) Name: Cao Wanzhen, Xu Youlong
Attorney & Agent: JIA YUJIAN
Abstract:
     The corrosive technology for anode aluminium foil of electrolytic capacitor includes immersing aluminium foil in 1-2% aqueous solution of sulfuric acid, DC electrolytic corrosion in mixture of hydrochloric acid (2-15%), sulfuric acid (2-10%), bichromate (1-20%) and F ions (0.01-1%) and then in 2-15% aqueous solution of hydrochloric acid and immersing in 10-50% aqueous solution of nitric acid, and features increasement of surface expansion rate and the specific volume of foil, and no damage to mechanical strength.
Time: 15