Method for mfg negative electrode foil of aluminium electrolytic capacitor

Abstract

This invention relates to a method for manufacturing cathode foils of aluminium electrolytic condensers including corrosion, middle treatment and post treatment characterizing in the technical process: pretreatmentí·corrosioní·burnetí·middle treatmentí·post treatmentí·dried. The burning is done in a dry oven under 300-550deg.c, for 30-80sec. forming and oxide film on the A1 foil surface and solidifying the surface holes eroded on the foil for reducing damage to the surface of the negative foil. Premiddle treatment can beaded after corrosion and before burning, the solution can be applied with0.5~0.9mol / L HNO3 under 28-35deg.c for 25-50sec.

Description

Technical field

[0001] The invention relates to a method for manufacturing negative electrode foil for aluminum electrolytic capacitors, in particular to a method for processing the negative electrode foil during the manufacturing process of the aluminum electrolytic capacitor negative electrode foil. Background technique

[0002] With the development of modern information technology, aluminum electrolytic capacitors are widely used in electronics, instruments, communications, measurement, computers, and aerospace technology. People have higher requirements for electrolytic capacitors. Negative electrode foil is one of the key materials for manufacturing electrolytic capacitors. , Continuously improving the specific volume of the negative electrode foil and improving the surface quality are the goals pursued by people. In the existing manufacturing process of negative electrode foil, the treatment of negative electrode foil generally adopts the process of corrosion→intermedi...