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Aluminum electrolytic capacitor low-voltage aluminum foil corrosion process

A technology of aluminum electrolytic capacitors and aluminum foils, which is applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of low specific volume, uneven corrosion, and performance degradation of corroded foils, and achieve uniform appearance, reduced specific surface area, and energy consumption. electric small effect

Inactive Publication Date: 2020-08-07
恒扬(韶关)工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the corrosion process of the existing aluminum foil, uneven corrosion often occurs, and local corrosion is excessive, resulting in low specific volume of the corroded foil and a decline in various performances. Therefore, the corrosion process of the electrode foil has always been the focus of the manufacturers. technology

Method used

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  • Aluminum electrolytic capacitor low-voltage aluminum foil corrosion process

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Embodiment 1

[0043] A low-voltage aluminum foil corrosion process for aluminum electrolytic capacitors, comprising the following steps:

[0044] S1, pre-processing:

[0045] Put the aluminum foil in phosphoric acid with a concentration of 0.5% for degreasing treatment at a temperature of 45°C for 1 minute, and then clean it with pure water;

[0046] S2. Electrolyzer hole layout:

[0047] Place the pre-treated aluminum foil in the electrolytic solution for electrolysis, wherein the electrolytic solution is an AlCl3 solution containing hydrochloric acid concentration: 7%, sulfuric acid, concentration 0.5%; power frequency: 25HZ, current: 350A, temperature: 35°C.

[0048] S3, middle processing:

[0049] Put the aluminum foil after the primary electrolytic cell is placed into the mixed corrosion solution at a temperature of 60°C for intermediate treatment, wherein the mixed corrosion solution is an AlCl3 solution containing 10% hydrochloric acid and 1% sulfuric acid;

[0050] S4. Deep hole...

Embodiment 2

[0063] A low-voltage aluminum foil corrosion process for aluminum electrolytic capacitors, comprising the following steps:

[0064] S1, pre-processing:

[0065] Put the aluminum foil in phosphoric acid with a concentration of 5% for degreasing treatment at a temperature of 60°C for 5 minutes, and then clean it with pure water;

[0066] S2. Electrolyzer hole layout:

[0067] Place the pretreated aluminum foil in the electrolytic solution for electrolysis, wherein the electrolytic solution is an AlCl3 solution containing hydrochloric acid concentration: 20%, sulfuric acid, concentration 1.5%; power frequency: 60HZ, current: 800A, temperature: 50°C.

[0068] S3, middle processing:

[0069]The aluminum foil after the primary electrolytic cell is placed in the mixed corrosion solution at a temperature of 80°C for intermediate treatment, wherein the mixed corrosion solution is an AlCl3 solution containing 20% ​​hydrochloric acid and 3% sulfuric acid;

[0070] S4. Deep hole of el...

Embodiment 3

[0083] A low-voltage aluminum foil corrosion process for aluminum electrolytic capacitors, comprising the following steps:

[0084] S1, pre-processing:

[0085] Degreasing the aluminum foil in phosphoric acid with a concentration of 2% at a temperature of 50°C for 2 minutes, and then cleaning it with pure water;

[0086] S2. Electrolyzer hole layout:

[0087] Place the pre-treated aluminum foil in the electrolytic solution for electrolysis, wherein the electrolytic solution is an AlCl3 solution containing hydrochloric acid: 12%, sulfuric acid, and 1% concentration; power frequency: 40HZ, current: 500A, temperature: 40°C.

[0088] S3, middle processing:

[0089] Put the aluminum foil after the primary electrolytic cell is placed into the mixed corrosion solution at a temperature of 70°C for intermediate treatment, wherein the mixed corrosion solution is an AlCl3 solution containing 15% hydrochloric acid and 2% sulfuric acid;

[0090] S4. Deep hole of electrolyzer:

[0091]...

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Abstract

The invention provides an aluminum electrolytic capacitor low-voltage aluminum foil corrosion process, which comprises the following steps of S1, pretreatment, S2, electrolytic cell hole distribution,S3, intermediate treatment, S4, electrolytic cell deep hole, S5, chemical cleaning, S6, post-treatment, S7, blow-drying, S8, drying, and S9, annealing. In order to overcome the defects in the prior art, the invention provides the low-voltage aluminum foil corrosion process for the aluminum electrolytic capacitor, wherein the process is proper in process condition and reasonable in corrosive liquid component proportion, so that the pore density is high and uniform.

Description

technical field [0001] The invention relates to the field of aluminum foil corrosion, in particular to a low-voltage aluminum foil corrosion process for an aluminum electrolytic capacitor. Background technique [0002] In the family of electrolytic capacitors, aluminum electrolytic capacitors have been rapidly developed in the world in the past 20 years due to their superior performance, low price and wide range of uses. In recent years, due to the rapid growth of the domestic electronic information industry and the steady growth of traditional industries such as household appliances, the market demand for aluminum electrolytic capacitors is increasing, which promotes the rapid development of my country's electronic aluminum foil processing industry and electrode foil processing industry. After more than 20 years of development, especially in the past five or six years, the quality of China's electronic aluminum foil has been greatly improved. [0003] Due to the increasing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055H01G9/045C25F3/04C25F3/14
CPCC25F3/04C25F3/14H01G9/045H01G9/055
Inventor 王中浩王建飞黄调
Owner 恒扬(韶关)工业有限公司
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