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A method for manufacturing medium-pressure corrosion foil

A manufacturing method and technology of corroding foil, which is applied to capacitors, circuits, electrical components, etc., can solve the problems of large dispersion rate of specific volume, poor uniformity of pores, easy bending, etc., and achieve small dispersion rate of specific volume and no surface The effect of small chromatic aberration and discrete rate

Active Publication Date: 2021-08-24
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method for manufacturing medium-pressure corrosion foil, aiming at solving the problem of poor uniformity, easy bending, and discrete specific volume of medium-pressure corrosion foil in the prior art. High rate of defects

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  • A method for manufacturing medium-pressure corrosion foil

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Effect test

Embodiment 1

[0027] A method for manufacturing a medium-pressure corrosion foil, comprising the following steps:

[0028] Step S1. Pretreatment: Soak the aluminum foil in the pretreatment solution for 50s, the treatment solution is the overflow solution of the primary porosity corrosion solution;

[0029] Step S2. First-level porosity corrosion: Spray the pretreated aluminum foil with a first-level porosity corrosion solution at a spray rate of 15L / h, and then place the aluminum foil in a first-level porosity corrosion at a temperature of 75°C In liquid, the applied current density is 2100mA / cm 2 direct current to carry out porosity corrosion for 60s, and the first-level porosity corrosion solution is a mixed solution of 1% hydrochloric acid and 6% sulfuric acid;

[0030] Step S3. Secondary porosity corrosion: Spray the aluminum foil after primary porosity corrosion with secondary porosity corrosion solution at a spray rate of 15 L / h, and then place the aluminum foil in a secondary porosi...

Embodiment 2

[0034] A method for manufacturing a medium-pressure corrosion foil, comprising the following steps:

[0035] Step S1. Pretreatment: Soak the aluminum foil in the pretreatment solution for 55s, the treatment solution is the overflow solution of the primary porosity corrosion solution;

[0036] Step S2. First-level porosity corrosion: Spray the pretreated aluminum foil with a first-level porosity corrosion solution at a spray rate of 15L / h, and then place the aluminum foil in a first-level porosity corrosion at a temperature of 80°C In liquid, the applied current density is 2300mA / cm 2 direct current to carry out porosity corrosion for 65s, and the first-level porosity corrosion solution is a mixed solution of 2% hydrochloric acid and 8% sulfuric acid;

[0037] Step S3. Secondary porosity corrosion: Spray the aluminum foil after primary porosity corrosion with secondary porosity corrosion solution at a spray rate of 15L / h, and then place the aluminum foil in a secondary porosit...

Embodiment 3

[0041] A method for manufacturing a medium-pressure corrosion foil, comprising the following steps:

[0042] Step S1. Pretreatment: immerse the aluminum foil in the pretreatment solution for 60 seconds, the treatment solution is the overflow solution of the primary porosity corrosion solution;

[0043] Step S2. Primary porosity corrosion: Spray the pretreated aluminum foil with a primary porosity corrosion solution at a spray rate of 15L / h, and then place the aluminum foil in a primary porosity corrosion at a temperature of 85°C In the liquid, the applied current density is 2500mA / cm 2 direct current to carry out porosity corrosion for 70s, and the first-level porosity corrosion solution is a mixed solution of 3% hydrochloric acid and 10% sulfuric acid;

[0044] Step S3. Secondary porosity corrosion: Spray the aluminum foil after primary porosity corrosion with secondary porosity corrosion solution at a spray rate of 15 L / h, and then place the aluminum foil in a secondary por...

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Abstract

The invention discloses a method for manufacturing a medium-pressure corroded foil, which comprises the steps of: pre-treatment of aluminum foil, first-stage porosity corrosion, secondary porosity corrosion, three-stage hole-expanding corrosion and post-treatment, and is characterized in that the method It also includes spraying the aluminum foil with the first-level pore corrosion solution before the first-level pore corrosion, and spraying the aluminum foil with the second-level pore corrosion solution before the second-level pore corrosion. The preparation method of the medium-voltage corroded foil provided by the present invention is simple in operation and easy to implement, without the need for an annealing process, a medium-voltage corroded foil with a large pore density and uniform distribution of small pores can be obtained, and the prepared medium-voltage corroded foil has a large electrostatic capacity , Good bending performance, small dispersion rate of specific volume, and no color difference on the surface.

Description

technical field [0001] The invention relates to the technical field of corroded foil production, in particular to a method for manufacturing medium-pressure corroded foil. Background technique [0002] With the development of the electronics industry, the requirements for the electrostatic capacity per unit surface area of ​​the corroded foil are getting higher and higher. Forming evenly distributed tunnel holes with high density and reasonable size (aperture diameter and pore length) on the surface of the medium-voltage aluminum foil is the key to obtaining high specific capacitance. key. At present, the electrolytic corrosion process of medium-pressure aluminum foil generally includes five main steps: pretreatment, primary porosity corrosion, secondary porosity corrosion, tertiary porosity expansion corrosion, and post-treatment (ie chemical cleaning). The existing pretreatment process of corroded foil is basically carried out by sulfuric acid hydrochloric acid, phosphori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/04H01G9/055
CPCC25F3/04H01G9/055
Inventor 杨富国梁发文李芷瑶李桐杨成锋邹文杰陈子超陈旭楷陈俊涛
Owner FOSHAN UNIVERSITY