METHOD FOR PRODUCING ALUMINUM MATERIAL FOR ELECTROLYTIC CAPACITOR ELECTRODE, ALUMINUM MATERIAL FOR ELECTROLYTIC CAPACITOR ELECTRODE, METHOD FOR PRODUCING ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR, AND ALUMINUM ELECTROLYTIC CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide a method of producing an aluminum material for an electrolytic capacitor electrode having excellent etching characteristic, the aluminum material for electrolytic capacitor electrode, a method for producing the electrode material for the electrolytic capacitor and the aluminum electrolytic capacitor. SOLUTION: The aluminum material for the electrolytic capacitor electrode is produced by bringing the surface of a cold-rolled aluminum material into contact with an aqueous acid solution containing one or more acids selected among sulfuric acids, hydrochloric acids and acids containing phosphorus, and then annealing the aluminum material. If necessary, the aluminum material is degreased before being brought into contact with the aqueous acid solution. COPYRIGHT: (C)2011,JPO&INPIT