公开(公告)号：DE10085077T1

公开(公告)日：2002-10-10

申请号：DE10085077

申请日：2000-09-25

Applicant: KEMET ELECTRONICS CORP

Inventor： MELODY BRIAN ,  KINARD JOHN ,  LESSNER PHILIP M

IPC: C25D11/26 ,  H01G9/00 ,  H01G9/04 ,  H01G9/052

Abstract: An electrolyte comprising water, an organic solvent selected from the group consisting of a polyethylene glycol, a polyethylene glycol monomethyl ether and mixtures thereof, and a sufficient amount of alkali metal salt of a weak organic acid, so that the electrolyte has a resistivity below about 250 ohm-cm/80° C. A method for differential anodizing porous valve metal body comprising the steps of: anodizing the bodies in a first electrolyte where the cathode surface is placed within an inch of but not in contact with the anode bodies, rinsing the bodies in deionized water, and re-anodizing the bodies in a second electrolyte, where the first electrolyte comprises water, an organic solvent selected from the group consisting of a polyethylene glycol, a polyethylene glycol monomethyl ether and mixtures thereof, and a sufficient amount of alkali metal salt of a weak organic acid so that the first electrolyte has a resistivity below about 250 ohm-cm/80° C.