Producing method for low voltage anode foil of aluminum electrolysis capacitor

A technology of aluminum electrolytic capacitors and low-voltage anode foils, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of insufficient process stability and low production efficiency, and achieve the effects of process stability, high production efficiency, and large capacity

Inactive Publication Date: 2011-06-15
DONGGUAN HEC CONDENSER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-voltage anode foils for aluminum electrolytic capacitors prepared by these existing technologies still have the disadvantages of low production efficiency and unstable process.

Method used

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  • Producing method for low voltage anode foil of aluminum electrolysis capacitor
  • Producing method for low voltage anode foil of aluminum electrolysis capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First-level corrosion: the corrosion solution is a mixture of hydrochloric acid and sulfuric acid, the temperature is 46°C, the frequency is 35 Hz, and the corrosion time is two minutes; intermediate treatment: the intermediate treatment solution is a phosphoric acid solution with a phosphoric acid content of not more than 10%, and the intermediate treatment time is for two minutes, the temperature is 50°C, and the concentration of the treatment solution is 5%;

[0016] Secondary corrosion: temperature is 30°C, frequency is 20 Hz, corrosion time is two minutes; intermediate treatment: time is two minutes, temperature is 50°C, concentration of treatment solution is 5%; third-level corrosion: temperature is 30°C, frequency The corrosion time is 20 Hz, and the corrosion time is two minutes; medium treatment: the time is two minutes, the temperature is 50°C, and the concentration of the treatment solution is 5%;

[0017] The fourth-level corrosion temperature is 26°C, the f...

Embodiment 2

[0021] Primary corrosion: temperature is 46°C, frequency is 25 Hz, corrosion time is two minutes; intermediate treatment: time is two minutes, temperature is 50°C, concentration of treatment solution is 5%; corrosion solution and intermediate treatment solution are the same as in Example 1 ;

[0022] Secondary corrosion: temperature is 30°C, frequency is 15 Hz, corrosion time is two minutes; intermediate treatment: time is two minutes, temperature is 50°C, concentration of treatment solution is 5%;

[0023] Tertiary corrosion: temperature is 30°C, frequency is 15 Hz, corrosion time is two minutes; intermediate treatment: time is two minutes, temperature is 50°C, concentration of treatment solution is 5%;

[0024] The fourth-level corrosion temperature is 26°C, the frequency is 13 Hz, and the corrosion time is two minutes; the middle treatment: the time is two minutes, the temperature is 50°C, and the concentration of the treatment solution is 5%;

[0025] Five-stage corrosion...

Embodiment 3

[0028] Primary corrosion: the temperature is 46°C, the frequency is 35 Hz, and the corrosion time is two minutes; intermediate treatment: the time is two minutes, the temperature is 50°C, and the concentration of the treatment solution is 5%; the corrosion solution and the intermediate treatment solution are the same as in Example 1 ;

[0029] Secondary corrosion: temperature is 30°C, frequency is 20 Hz, corrosion time is two minutes; intermediate treatment: time is two minutes, temperature is 50°C, concentration of treatment solution is 5%;

[0030] Tertiary corrosion: temperature is 30°C, frequency is 15 Hz, corrosion time is two minutes; intermediate treatment: time is two minutes, temperature is 50°C, concentration of treatment solution is 5%;

[0031] The fourth-level corrosion temperature is 30°C, the frequency is 13 Hz, and the corrosion time is two minutes; the middle treatment: the time is two minutes, the temperature is 50°C, and the concentration of the treatment so...

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Abstract

The invention relates to the technical field of the preparation of aluminum foil, in particular to a preparation method of a low-voltage anode foil for electrolytic capacitors. The extended-surface corrosion for the aluminum foil is carried out by multiple frequency conversion electric corrosion, so the invention has the characteristics of high production efficiency, stable technology, easy elimination of technology fault; the capacitance of the products is 10 percent higher than that of domestic products universally eroded by 50 Hz AC, and the aluminum foil has high use efficiency and high strength under the same corrosion weight loss condition.

Description

Technical field: [0001] The invention relates to the technical field of aluminum foil preparation, in particular to a preparation method of a low-voltage anode foil for an aluminum electrolytic capacitor. Background technique: [0002] Low-voltage anode foil expansion corrosion, before the mid-1980s, used 50 Hz alternating current to carry out corrosion, but with the development and progress of science and technology, the need for electrode foil capacity, 50 Hz AC corrosion is getting closer and closer to the development bottleneck, so Countries have successively abandoned this process and studied new corrosion methods. Japan, which is at the forefront of this technology in the world, has published many patents and articles. The representative methods are as follows: A. Using AC and DC in electrochemical corrosion; B. AC corrosion current waveform, amplitude And the method of positive and negative half-cycle asymmetry; C, and changing the frequency, using a frequency lower ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/045H01G9/055C25F3/04
CPCY02E60/13
Inventor 冉亮
Owner DONGGUAN HEC CONDENSER CO LTD
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