A kind of low-voltage soft state corrosion anode aluminum foil and its preparation method and application

A technology of anode aluminum foil and soft state, which is applied in the field of low-pressure soft-state corrosion anode aluminum foil and its preparation, can solve the problems of poor passivation effect of intermediate treatment, low specific volume of low-voltage soft-state corrosion anode aluminum foil, etc., to improve passivation ability, The effect of promoting growth and increasing volume

Active Publication Date: 2022-04-22
乳源县立东电子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of low specific volume and poor passivation effect of the low-voltage soft-state corroded anode aluminum foil obtained by using ammonium adipate in the process of charging, and provide a low-pressure soft-state Preparation method of corroded anode aluminum foil

Method used

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  • A kind of low-voltage soft state corrosion anode aluminum foil and its preparation method and application
  • A kind of low-voltage soft state corrosion anode aluminum foil and its preparation method and application
  • A kind of low-voltage soft state corrosion anode aluminum foil and its preparation method and application

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Effect test

Embodiment 1

[0061] A low-pressure soft-state corrosion method for anode aluminum foil, comprising the steps of:

[0062] S1. Prepare a 105 μm low-pressure soft anodic electronic aluminum foil (light foil) with a sample area of ​​5.5cm×13cm, and perform degreasing treatment in phosphoric acid with a temperature of 70°C and a concentration of 1.5wt% for 1min;

[0063] S2. Electrochemical corrosion: put the low-voltage soft anode electronic aluminum foil in S1 in a mixed solution of 10wt% hydrochloric acid and 0.02wt% sulfuric acid, and use a current density of 0.25A / cm 2 The non-sinusoidal alternating current is used for galvanic corrosion for 60s, and after the corrosion is completed, it is washed with water;

[0064] S3 sintering treatment: put the aluminum foil obtained in S2 in a sintering furnace and sinter at 300°C for 0.5 minutes;

[0065] S4. Intermediate treatment: place the aluminum foil obtained in S3 in an alkaline salt solution passivation solution containing phosphorus and ni...

Embodiment 2

[0070] A low-pressure soft-state corrosion method for anode aluminum foil, comprising the steps of:

[0071] S1. Prepare a 105 μm low-pressure soft anodic electronic aluminum foil (light foil) with a sample area of ​​5.5cm×13cm, and perform degreasing treatment in phosphoric acid with a temperature of 70°C and a concentration of 1.5wt% for 1min;

[0072] S2. Electrochemical corrosion: put the low-voltage soft anode electronic aluminum foil in S1 in a mixed solution of 3wt% hydrochloric acid and 2wt% sulfuric acid, and use a current density of 0.05A / cm 2 The non-sinusoidal alternating current is used for galvanic corrosion for 60s, and after the corrosion is completed, it is washed with water;

[0073] S3 sintering treatment: put the aluminum foil obtained in S2 in a sintering furnace and sinter at 250°C for 0.5 minutes;

[0074] S4. Intermediate treatment: place the aluminum foil obtained in S3 in an alkaline salt solution passivation solution containing phosphorus and nitrog...

Embodiment 3

[0079] A low-pressure soft-state corrosion method for anode aluminum foil, comprising the steps of:

[0080] S1. Prepare a 105 μm low-voltage soft anodic electronic aluminum foil (light foil) with a sample area of ​​5.5cm×13cm, and perform degreasing treatment in phosphoric acid with a temperature of 70°C and a concentration of 1.5wt% for 1min;

[0081] S2. Electrochemical corrosion: put the low-voltage soft anode electronic aluminum foil in S1 in a mixed solution of 15wt% hydrochloric acid and 0.001wt% sulfuric acid, and use a current density of 0.3A / cm 2 The non-sinusoidal alternating current is used for galvanic corrosion for 60s, and after the corrosion is completed, it is washed with water;

[0082] S3 sintering treatment: put the aluminum foil obtained in S2 in a sintering furnace and sinter at 350°C for 0.5 minutes;

[0083] S4. Intermediate treatment: place the aluminum foil obtained in S3 in an alkaline salt solution passivation solution containing phosphorus and nit...

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Abstract

The invention discloses a low-voltage soft-state corroded anode aluminum foil, a preparation method and application thereof. The preparation method of the low-voltage soft-state corroded anode aluminum foil includes the following steps: S1 electrochemical corrosion: galvanic corrosion is carried out in acid, and water washing is carried out after the corrosion is completed; S2 sintering treatment: forming an oxide film on the surface of the aluminum foil; S3 treatment: the Passivation treatment of aluminum foil in passivation solution; S4 water washing: wash the aluminum foil after intermediate treatment with water; S5 repeat steps S1-S4, repeat 10-12 times; S6 wash with water after chemical cleaning, and then perform stabilization treatment, drying Dry treatment to obtain a low-pressure soft-corrosion anode aluminum foil. In step S2, the burning temperature is 200-400° C., and the burning time is 0.3-1 minute. The low-voltage soft-state corrosion anode aluminum foil of the present invention has a chemical specific volume of 18.3-19.97 μf / cm at 70V and 140V 2 And 5.23~5.51μf / cm 2 .

Description

technical field [0001] The invention relates to the technical field of corroded foil electrodes, in particular to a low-pressure soft-state corroded anode aluminum foil, a preparation method and application thereof. Background technique [0002] Aluminum electrolytic capacitors are one of the basic electronic components, widely used in traditional industries such as communications, home appliances, automobiles, electronics, aviation, and new fields of environmental protection and energy conservation such as rail transit, flat panel display, solar energy, and wind energy batteries. Low cost feature. [0003] Electrode aluminum foil is the key basic material of aluminum electrolytic capacitors. The complete industrial chain of electrode foil is: refined aluminum (high-purity aluminum ingot)——electronic aluminum foil (light foil)—corrosion foil—formed foil—aluminum electrolytic capacitor—— Electronic machine. Among them, corroded foil is the most difficult and complex link in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/055H01G9/045C25F3/04C23C8/10
CPCH01G9/055H01G9/045C25F3/04C23C8/10
Inventor 冉亮刘俊英杨海亮
Owner 乳源县立东电子科技有限公司
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