METHOD OF PRODUCING ALUMINUM MATERIAL FOR ELECTROLYTIC CAPACITOR ELECTRODE, ALUMINUM MATERIAL FOR ELECTROLYTIC CAPACITOR ELECTRODE, METHOD OF PRODUCING ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR, AND ALUMINUM ELECTROLYTIC CAPACITOR ELECTROLYTE CAPACITORS

摘要

<P>PROBLEM TO BE SOLVED: To provide a method of producing an aluminum material for an electrolytic capacitor electrode having excellent etching properties achieved by more stabilizing a surface layer oxide film of the aluminum material to solve the problem in the surface treatment before final annealing in the conventional production of the above aluminum material. Ž<P>SOLUTION: The method of producing the aluminum material for the electrolytic capacitor electrode includes removing the surface layer of the aluminum material subjected to cold rolling in an amount of 5-200 nm per side, bringing the material into contact with a phosphorus-containing acid aqueous solution, and then annealing it. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž