Anode corrosion foil manufacturing method and aluminum foil corrosion electrolytic cell

A manufacturing method and anode corrosion technology, applied in electrolytic capacitors, circuits, capacitors, etc., can solve problems such as low electrostatic capacity, poor bending strength, and affect the surface area of ​​corrosion holes, so as to ensure mechanical strength and improve consistency.

Active Publication Date: 2015-08-12
RUYUAN DONGYANGGUANG MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus affecting the surface area of ​​corrosion holes, resulting in low capacitance or poor bending strength
Traditional methods generally improve the performance of corroded foils by adding polymer corrosion inhibitors or controlling the electrolytic current waveform. Such improvements are not conducive to the transformation between laboratories and production.

Method used

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  • Anode corrosion foil manufacturing method and aluminum foil corrosion electrolytic cell
  • Anode corrosion foil manufacturing method and aluminum foil corrosion electrolytic cell
  • Anode corrosion foil manufacturing method and aluminum foil corrosion electrolytic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pretreatment: Use domestic aluminum foil with a thickness of 120 μm, first put the aluminum foil into a sodium hydroxide solution with a concentration of 1-4Wt%, and treat it at 45°C for 1min; after washing with water, put it into a mixture of 30% sulfuric acid and 5Wt% hydrochloric acid, at 60°C, Process 1min;

[0025] 1. Electrolysis: In the first half of V, direct current is applied between the plates in the 30Wt% sulfuric acid + 6Wt% hydrochloric acid + 1.5Wt% aluminum ion bath, and the current density is 0.5A / cm 2 , the temperature is preferably 72-78°C. In this embodiment, it is 73.5°C. The pretreated aluminum foil is treated for 75-95s, which is 90s in this embodiment; Chemical corrosion in the solution at 35°C for 75-95s, 90s in this example; then wash with water;

[0026] Two electrolysis: put the corroded foil after the electrolytic treatment into the aqueous solution whose concentration is 10Wt% nitric acid+(0.01-0.1)Wt% polyacrylic acid, the concentration o...

Embodiment 2

[0031] Pretreatment: Use domestic aluminum foil with a thickness of 120 μm, first put the aluminum foil into a sodium hydroxide solution with a concentration of 1-4Wt%, and treat it at 45°C for 1min; after washing with water, put it into a mixture of 30% sulfuric acid and 5Wt% hydrochloric acid, at 60°C, Process 1min;

[0032] 1. Electrolysis: The first half of electrolysis applies direct current to the plate in the 45Wt% sulfuric acid + 2Wt% hydrochloric acid + 1.5Wt% aluminum ion bath, and the current density is 0.5A / cm 2 , the temperature is 72.5°C, and the pretreated aluminum foil is treated for 87s; after electrolysis, half V is chemically etched at 25-75°C in the aluminum ion solution of 45Wt% sulfuric acid + 2Wt% hydrochloric acid + 1.5Wt%, and this embodiment is 45 Chemical corrosion at ℃ for 87s, then washed with water;

[0033] 2. Electrolysis: Put the corroded foil after electrolytic treatment into an aqueous solution with a concentration of 4Wt% nitric acid + 0.1W...

Embodiment 3

[0038]Pretreatment: Use domestic aluminum foil with a thickness of 120 μm, first put the aluminum foil into a sodium hydroxide solution with a concentration of 1-4Wt%, and treat it at 45°C for 1min; after washing with water, put it into a mixture of 30% sulfuric acid and 5Wt% hydrochloric acid, at 60°C, Process 1min;

[0039] 1. Electrolysis: the first half of electrolysis applies direct current to the plate in the 30Wt% sulfuric acid + 5Wt% hydrochloric acid + 0.5Wt% aluminum ion bath, and the current density is 0.5A / cm 2 , the temperature is 74.5°C, and the pretreated aluminum foil is treated for 84s; after electrolysis, half V is chemically corroded at 55°C for 84s in 30Wt% sulfuric acid + 5Wt% hydrochloric acid + 0.5Wt% aluminum ion solution, and then washed with water;

[0040] 2. Electrolysis: Put the corroded foil after electrolytic treatment into an aqueous solution with a concentration of 10Wt% nitric acid + 0.1Wt% polyacrylic acid, and conduct DC electrolytic corrosi...

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Abstract

The invention relates to an aluminum foil corrosion electrolytic cell, an anode corrosion foil manufacturing method and a device. According to the anode corrosion foil manufacturing method, aluminum foil which has been subjected to high-temperature vacuum annealing is adopted as raw materials; a primary electrolysis-secondary electrolysis-tertiary electrolysis method is adopted; according to the first half V of the primary electrolysis, direct current corrosion is adopted between pole plates, especially, at the second half V of the primary electrolysis, a cooling device is adopted to create a low-temperature environment. The aluminum foil corrosion electrolytic cell comprises an electrolytic cell body and two electrode plates which are located in the electrolytic cell body and are arranged in parallel; the aluminum foil corrosion electrolytic cell further comprises a cooling device; the cooling device is located at the outer sides of the electrode plates and comprises two cooling plates; the two cooling plates and an electrolytic plate are arranged in parallel; and the two cooling plates form an elongated aluminum foil channel. With the aluminum foil corrosion electrolytic cell and the anode corrosion foil manufacturing method adopted, technical problems of low electrostatic capacity or deteriorated bending strength which are caused by the inconformity of lengths of channel holes in aluminum foil radial growth can be solved, and laboratory-to-production transformation can be benefitted. The anode corrosion foil manufacturing method is used for manufacturing medium-and-high voltage anode corrosion foil.

Description

technical field [0001] The invention relates to a method and a device for manufacturing an anode corrosion foil, in particular to a method for manufacturing an anode corrosion foil for an aluminum electrolytic capacitor and the field of an electrolytic cell. Background technique [0002] Due to the development of aluminum electrolytic capacitors to light, thin and high performance, and the electrostatic capacity of aluminum electrolytic capacitors is mainly provided by the anode foil, it is urgent to improve the electrostatic capacity of the anode corrosion foil. The traditional manufacturing process of corroded foil for medium and high voltage anode foil is mostly: aluminum foil → pretreatment → first electrolysis → second electrolysis → third electrolysis → post-treatment. The current high-speed machine generally adopts a first-level 2V or above galvanic corrosion mode to shorten the reaction time. Regardless of whether one or more slots are used in the first stage, most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/045H01G9/055C25F3/04
Inventor 王宪杨海亮罗向军
Owner RUYUAN DONGYANGGUANG MACHINERY CO LTD
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