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Production method of low voltage aluminum anode foil for electrolytic condenser

An electrolytic capacitor, anode aluminum foil technology, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of poor hydration resistance and moisture resistance, and achieve the effect of improving hydration resistance, improving performance, and superior market competitiveness.

Active Publication Date: 2015-05-06
华德士电子(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, most of the production methods of aluminum foil use the ammonium adipate forming liquid as the pre-treatment process, which has the disadvantages of poor hydration resistance and moisture resistance.

Method used

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  • Production method of low voltage aluminum anode foil for electrolytic condenser

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Effect test

Embodiment 1

[0029] A method for producing low-voltage anode aluminum foil for electrolytic capacitors, comprising the steps of:

[0030] 1) Primary chemical conversion treatment (F1): add aluminum foil to ammonium adipate solution with a concentration of 50% for chemical conversion treatment, control the temperature at 72°C, pH at 5.2, conductivity at 80±5ms / cm, and voltage at 17 ±3(V), the current is 800±200(A), the formation time is 6 minutes, and the first-grade chemically formed aluminum foil is obtained;

[0031] 2) Secondary chemical conversion treatment (F2): Add the primary chemically formed aluminum foil to the ammonium dihydrogen phosphate solution with a concentration of 1.6% for chemical conversion treatment, control the temperature at 72°C, pH at 5.2, conductivity at 4.0ms / cm, The current is 54±3(V), the current is 700±200A, and the formation time is 6 minutes, and the secondary formation aluminum foil is obtained;

[0032] 3) Three-stage chemical conversion treatment (F+1):...

Embodiment 2

[0048] A method for producing low-voltage anode aluminum foil for electrolytic capacitors, comprising the steps of:

[0049] 1) Primary chemical conversion treatment (F1): add aluminum foil to ammonium adipate solution with a concentration of 50% for chemical conversion treatment, control the temperature at 75°C, pH at 6.0, conductivity at 80±5ms / cm, and voltage at 17 ±3(V), the current is 800±200(A), the formation time is 6 minutes, and the first-grade chemically formed aluminum foil is obtained;

[0050] 2) Secondary chemical conversion treatment (F2): Add the primary chemically formed aluminum foil to the ammonium dihydrogen phosphate solution with a concentration of 1.6% for chemical conversion treatment, control the temperature at 75°C, pH at 6.0, and conductivity at 4.5±0.5ms / ㎝ , the voltage is 54±3(V), the current is 700±200A, the formation time is 6 minutes, and the secondary formation aluminum foil is obtained;

[0051] 3) Three-stage chemical conversion treatment (F...

Embodiment 3

[0067] A method for producing low-voltage anode aluminum foil for electrolytic capacitors, comprising the steps of:

[0068] 1) Primary chemical conversion treatment (F1): Add aluminum foil to ammonium adipate solution with a concentration of 50% for chemical conversion treatment. ±3(V), the current is 800±200(A), the formation time is 6 minutes, and the first-grade chemically formed aluminum foil is obtained;

[0069] 2) Secondary chemical conversion treatment (F2): Add primary chemically formed aluminum foil to ammonium dihydrogen phosphate solution with a concentration of 1.6% for chemical conversion treatment, control the temperature at 78°C, pH at 6.8, and conductivity at 4.5±0.5ms / ㎝ , the voltage is 54±3(V), the current is 700±200A, the formation time is 6 minutes, and the secondary formation aluminum foil is obtained;

[0070] 3) Three-stage chemical conversion treatment (F+1): Add secondary chemically formed aluminum foil to ammonium adipate solution with a concentrat...

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Abstract

The invention discloses a production method of a low voltage aluminum anode foil for an electrolytic condenser. The production method including the steps of: 1, adding aluminum foil into ammonium adipate solution for formation treatment; 2, performing secondary formation treatment; 3, performing third formation treatment; 4, performing fourth formation treatment; 5, performing fifth formation treatment; 6, performing sixth formation treatment; 7, performing depolarization treatment; 8, performing primary repair formation treatment; 9, performing secondary repair formation treatment; 10, performing aftertreatment; 11, performing thermal treatment: including putting the aluminum foil which is subjected to aftertreatment into a roasting furnace for roasting, then putting the roasted aluminum foil into a drying furnace for drying, and thereby the product is obtained. The aluminum foil manufactured according to the production method provided by the invention is improved in anti-hydration and wet-resistance of the oxide film.

Description

technical field [0001] The invention relates to a production method of aluminum foil, in particular to a production method of low-voltage anode aluminum foil for electrolytic capacitors. Background technique [0002] Electronic aluminum foil can be divided into high-voltage anode foil, low-voltage anode foil, negative electrode foil, etc. With the development of aluminum electrolytic capacitors, the market competition has become more and more fierce, and the quality requirements of customers for low-voltage electronic aluminum foil have also increased accordingly. For the hydration characteristics of the oxide film of 110-125VF anode electronic aluminum foil, the original 2-hour hydration resistance boost time It can meet the customer's hydration performance requirements for the product within less than 60 seconds. Now it needs to increase the pressure within less than 50 seconds after boiling for 12 hours to meet the customer's hydration performance requirements for the pro...

Claims

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Application Information

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IPC IPC(8): H01G9/045C22C21/00C22F1/04
Inventor 陈永增彭亮红彭书红李智强
Owner 华德士电子(东莞)有限公司
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