Method for enlarging surface area of ultrahigh voltage electrode foil by corrosion

An electrode foil and ultra-high voltage technology, which is applied in the direction of removing regulations on metal surfaces, can solve the problems of enlarged surface area of ​​aluminum foil and lack of electrochemical treatment methods for electrode foils, and achieves the effects of high specific volume, high strength, and pollution reduction.

Inactive Publication Date: 2013-01-16
ZHEJIANG FENGCHUAN ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing electrode foil lacks a

Method used

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  • Method for enlarging surface area of ultrahigh voltage electrode foil by corrosion

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the method of the present invention of the present invention at least comprises the following steps:

[0027] The method for corroding and expanding the surface of ultra-high voltage electrode foil is characterized in that the method at least includes the following steps:

[0028] 1) Raw material selection: choose the appropriate raw material aluminum foil;

[0029] 2) Pre-treatment: the purpose is to remove oil and oxides on the surface of raw aluminum foil; pre-treatment uses a concentration of 10-25% H by weight 2 SO 4 Solution, the temperature of the solution is controlled at 40-70°C, the treatment time of aluminum foil in the solution is 1-5min; the pretreatment is carried out in the acid tank;

[0030] 3) Water washing: the aluminum foil obtained in step 2) is washed with water; the purpose of water washing is...

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Abstract

The invention relates to a method for enlarging the surface area of ultrahigh voltage electrode foil by corrosion. The method at least comprises the following steps of: selecting raw materials, performing pretreatment, washing, performing primary corrosive surface area enlarging treatment, washing, performing secondary corrosive surface area enlarging treatment, washing, performing third-time corrosive surface area enlarging treatment, washing, performing fourth-time corrosive surface area enlarging treatment, washing, performing fifth-time corrosive surface area enlarging treatment, washing, performing chemical washing, washing by pure water, and drying a finished product. By the method, the ultrahigh voltage electrode foil with high specific volume and high strength can be produced.

Description

technical field [0001] The invention belongs to a production method of an electrode foil, in particular to a method for corroding and enlarging an ultra-high voltage electrode foil. Background technique [0002] At present, the volume miniaturization of electronic components is becoming more and more obvious. For aluminum electrolytic capacitors, in order to achieve volume miniaturization, it is necessary to increase the unit electrostatic capacity of the positive aluminum foil used as the anode of the capacitor. By the principle formula of the capacitor: It can be seen that the dielectric coefficient of the medium Is a constant, so to increase the capacitance Cap, you need to increase the surface area S of the electrode or reduce the thickness d of the medium. The realization of the expansion of the surface area of ​​the aluminum foil is conducive to improving the electrostatic capacity. But at present, there is a lack of an effective electrochemical treatment meth...

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Application Information

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IPC IPC(8): C23F1/20H01G13/06
Inventor 邹汉彬
Owner ZHEJIANG FENGCHUAN ELECTRONICS TECH
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