Formation method of anodic aluminum foil

Abstract

The invention discloses a formation method of anodic aluminum foil, which comprises the following steps: preprocessing; energizing by multi-stage voltage to form an oxide film on the surface of the aluminum foil; and repeatedly damaging and repairing the oxide film. The processes of energizing by multi-stage voltage and repeatedly damaging and repairing are carried out in weakly acidic tank liquor of different concentration; and before and after the aluminum foil enters different weakly acidic tank liquor every time, the aluminum foil needs to be washed by water to clear the acid liquor residues on the surface of the aluminum foil, wherein in the water washing method, pure water is firstly used for cooling the front section, and the pure water is directly used for cleaning the back section. In the formation method of anodic aluminum foil, which is provided by the invention, the pure water is directly used for cooling the front section, and the heated pure water is directly used for cleaning the back section, thereby ensuring good cleaning effect, saving heat and water and reducing the production cost.

Description

technical field [0001] The invention relates to a method for manufacturing an anode aluminum foil, in particular to a method for forming an anode aluminum foil. Background technique [0002] With the rapid development of the electronic industry, the application of aluminum electrolytic capacitors is more extensive, and the performance requirements are getting higher and higher. Corrosion formed foil for aluminum electrolytic capacitors is a special electronic material for basic components in the electronic information industry. In addition to the quality of the light foil itself, for aluminum foils used in aluminum electrolytic capacitors, the corrosion process is the key to obtaining excellent performance such as high specific volume and high strength. process link. Etching is a pre-processing step in the manufacture of formed foils. The specific volume of corroded foil is the basis and key to the specific volume of formed foil. In order to obtain satisfactory performanc...

AI Technical Summary

Problems solved by technology

Among them, the chemical formation method includes pretreatment -> multi-level voltage empowerment to form an oxide film on the surface of aluminum foil -> repeated damage to repair the oxide film, wherein the multi-level voltage empowerment and repeated damage repair are carried out between different weakly acidic baths Each time the aluminum foil enters different weakly acidic baths, it needs to be washed to remove boric acid, phosphoric acid and other residues on the surface of the aluminum foil. In the existing chemical production process, the front end is generally cooled with tap water at the front end, and then pure water is used to clean the surface of the aluminum foil. Boric acid, phosphoric acid and other residues, in order to ensure a good cleaning effect, generally need to use hot water spray for cleaning, wasting heat and water