Method for electrolytically etching of a recrystallized aluminum foil

摘要

A method of etching a recrystallized aluminum foil which utilizes potentiostatic etching to roughen the foil to obtain a particularly high roughening factor. The etching preferably occurs in two stages in which the etching current density of the first stage is above the current density which creates an undesired pitting of the aluminum and a second stage which utilizes an etching current density which is below the density which creates pitting of the aluminum.