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

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an aluminum material for an electrolytic capacitor electrode excellent in etching properties, in which the problem that the etching properties of an aluminum material after final annealing are insufficient is solved by appropriately controlling the content of included trace elements, in the production of an aluminum material for an electrolytic capacitor electrode in which heating in an oxidizing atmosphere is performed after the completion of cold rolling and before final annealing, and to provide an aluminum material for an electrolytic capacitor electrode, an anode material for an aluminum electrolytic capacitor, a method for producing an anode material for an electrolytic capacitor, and an aluminum electrolytic capacitor.SOLUTION: In the production of the aluminum material for an electrolytic capacitor electrode, the content of Pb in the aluminum material is set to 0.3-2.5 ppm by mass, and the aluminum material after the completion of cold rolling and before final annealing is heated in an oxidizing atmosphere.