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Preparation method of high-pressure high-specific-volume corrosion foil

A technology of corroding foil and high ratio, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of unsatisfactory specific volume and strength of anode foil, so as to increase the density and uniformity of pores, improve the chance of pores, and the pores high density effect

Active Publication Date: 2019-04-02
RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect and deficiency that the specific volume and strength of the existing anode foil cannot satisfy the medium-high voltage and large-capacity electrolytic container, and provide a preparation method of high-voltage high-specific volume corrosion foil, which is superimposed by AC and DC to generate pores Increase the density and uniformity of pores, so as to obtain corrosion foil products with high specific volume in the high pressure section

Method used

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  • Preparation method of high-pressure high-specific-volume corrosion foil
  • Preparation method of high-pressure high-specific-volume corrosion foil
  • Preparation method of high-pressure high-specific-volume corrosion foil

Examples

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Embodiment 1

[0038] A preparation method of high pressure high specific volume corrosion foil, such as figure 1 shown, including the following steps:

[0039] S1. Pretreatment: Take soft electronic aluminum foil with a purity greater than or equal to 99.99% and a thickness of 125 μm, and heat it under 3.5% H 3 PO 4 Soak in mixed acid of +20ppm lead acetate at 65°C for 60 seconds;

[0040] S2. Primary electrochemical porosity: The pretreated light foil is subjected to primary porosity, and the applied current is alternating and direct current superposition, wherein the DC density is 0.7A / cm2, the AC density is 0.05A / cm2, and the AC frequency is 1200Hz , processing time 35s, processing temperature 73.5°C, electrolyte 30%H 2 SO 4 , 2.8% HCl, 3% H 3 PO 4 and 1% Al 3+ mixed solution;

[0041] S3. Intermediate treatment: Soak the first-level corroded foil with pores in the first-level waste liquid, the soaking temperature is 93°C, and the soaking time is 15s;

[0042] S4. Secondary elec...

Embodiment 2

[0049] A method for preparing a high-pressure high-volume corroded foil, comprising the following steps:

[0050] S1. Pretreatment: take a soft electronic aluminum foil with a purity greater than or equal to 99.99% and a thickness of 125 μm, soak it in 8% HCl at 85°C for 60 seconds;

[0051] S2. Primary electrochemical porosity: The pretreated light foil is subjected to primary porosity, and the applied current is alternating and direct current superposition, wherein the DC electric density is 0.75A / cm 2 , AC density is 0.08A / cm 2 , the AC frequency is 1500Hz, the processing time is 35s, the processing temperature is 74.5°C, and the electrolyte is 20% H 2 SO 4 , 2.8% HCl, 6% H 3 PO 4 and 1% Al 3+ mixed solution;

[0052] S3. Intermediate treatment: Soak the first-level corroded foil with pores in the first-level waste liquid, the soaking temperature is 93°C, and the soaking time is 15s;

[0053] S4. Secondary electrochemical porosity: The medium-treated light foil is su...

Embodiment 3

[0057] A method for preparing a high-pressure high-volume corroded foil, comprising the following steps:

[0058] S1. Pretreatment: Take soft electronic aluminum foil with a purity greater than or equal to 99.99% and a thickness of 125 μm, and heat it under 3.5% H 3 PO 4 Soak in +20ppm lead acetate for 60 seconds at 85°C;

[0059] S2. Primary electrochemical porosity: The pretreated light foil is subjected to primary porosity, and the applied current is alternating and direct current superposition, wherein the DC electric density is 0.75A / cm 2 , AC density is 0.05A / cm 2 , the AC frequency is 1500Hz, the processing time is 35s, the processing temperature is 73°C, and the electrolyte is 30%H 2 SO 4 , 2.8% HCl, 3% H 3 PO 4 and 1% Al 3+ mixed solution;

[0060] S3. Intermediate treatment: Soak the first-level corroded foil with pores in the first-level waste liquid, the soaking temperature is 93°C, and the soaking time is 15s;

[0061] S4. Secondary electrochemical porosi...

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Abstract

The invention discloses a preparation method of high-pressure high-specific-volume corrosion foil. The preparation method includes the following steps of pre-treatment; primary hole generating, wherein pre-treated light foil is subjected to primary hole generating, and applied currents are superposed alternating currents and direct currents; intermediate treatment; secondary electrochemical hole generating, wherein the intermediately-treated light foil is subjected to secondary hole generating in a power transformation field; hole enlarging corrosion; and after-treatment. The preparation method mainly aims at control over the hole generating density and uniformity of primary hole generating and secondary hole generating, the superposed alternating currents and direct currents at the specific current density are adopted for primary hole generating, power transformation field hole generating is adopted for secondary hole generating, the uniformity and growth consistency of hole generating are improved, thus, the specific volume of anode foil is improved, the bending strength can reach 7 times or above, the electrostatic capacity can reach 0.8 or above, the average hole diameter can reach 1.27 micrometers, the beneficial effects of being high in production speed, high in specific volume and good in performance consistency are achieved, the quality of existing corrosion foil can begreatly improved, and the requirements of the anode foil of middle-high-pressure high-capacity electrolysis containers are met.

Description

technical field [0001] The invention relates to the technical field of corroded foils for aluminum electrolytic capacitors, in particular to a method for preparing high-voltage and high-specific-volume corroded foils. Background technique [0002] Aluminum electrolytic capacitors are energy storage components widely used in the electronic and electrical industries, and the anode foil for aluminum electrolytic capacitors is an important raw material. The structural characteristics of the anode foil determine the electrical properties of aluminum electrolytic capacitors. With the rapid development of electronic information technology and the birth of new complete machines, the demand for miniaturized, chip-type, medium-high-voltage and large-capacity electrolytic containers continues to grow, and correspondingly higher specific volume and strength of anode foils are also proposed. requirements. The anode foil is used as the anode of the electrolytic capacitor, and the specifi...

Claims

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Application Information

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IPC IPC(8): C25F3/04C25F7/00
CPCC25F3/04C25F7/00
Inventor 陈锦雄汪启桥肖远龙赵飞燕罗向军
Owner RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD