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An energy-saving and environment-friendly electrochemical corrosion expansion method for electronic aluminum foil

An electronic aluminum foil, energy saving and environmental protection technology, applied in the direction of electrolytic capacitors, capacitors, circuits, etc., can solve the problems of increasing the cost of chemical drugs, difficult to control the stability of alkali cleaning process, affecting the mechanical properties of aluminum foil, etc. Reasonable, highly uniform, good uniformity

Active Publication Date: 2017-05-10
GUANGDONG HUAFENG NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in high energy consumption, large consumption of chemical raw materials, and a large amount of hydrochloric acid waste gas pollution during the corrosion treatment process
In order to ensure the effect of surface expansion, it is necessary to add various corrosion inhibitors to the electrocorrosive solution (corrosion electrolyte) to prevent excessive corrosion, which affects the mechanical properties of the aluminum foil, and the increase in the use of chemicals not only increases the cost of the enterprise, but also May cause difficult environmental pollution problems
In addition, due to the residual oil on the surface of electronic aluminum foil (optical foil), the presence of lattice defects and dislocations, etc., surface treatment needs to be carried out in advance. The surface treatment methods reported in the literature generally use alkali cleaning process or phosphoric acid treatment process. The stability of alkaline cleaning process Difficult to control, while phosphoric acid treatment process waste requires a large amount of lime to be neutralized to meet the emission target

Method used

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  • An energy-saving and environment-friendly electrochemical corrosion expansion method for electronic aluminum foil
  • An energy-saving and environment-friendly electrochemical corrosion expansion method for electronic aluminum foil
  • An energy-saving and environment-friendly electrochemical corrosion expansion method for electronic aluminum foil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 Implement the present invention according to the following steps:

[0030] (1) Surface treatment: use 2.0 mol / L HCl and 0.1 mol / L AlCl 3 Mix the solution and treat the surface of the electronic aluminum foil (light foil) at 60°C for 80 seconds;

[0031] (2) Nanocloth holes: place the aluminum foil obtained in step (1) under a sinusoidal waveform with a current density of 0.35~0.55A / cm², a frequency of 25-35Hz, a temperature of 35~45°C, and 2 mol / L of HCl , 0.1 mol / L AlCl 3 , 0~1 mol / LH 2 SO 4 , 0~1 mol / L H 3 PO 4 , 0~1 mol / L HNO 3 Take it out after 20 seconds in the mixed solution (electrocorrosive solution);

[0032] (3) Surface cleaning: put the aluminum foil obtained in step (2) into pure water at 20~35°C for 40 seconds and take it out;

[0033] (4) Repeat hole layout: Repeat step (2) and step (3) 1 to 3 times, and the specific process parameters can be adjusted appropriately;

[0034] (5) Deep electric corrosion: place the aluminum foil obtaine...

Embodiment 2

[0039] Embodiment 2 Implement the present invention according to the following steps:

[0040] (1) Surface treatment: use 2.0 mol / L HCl and 0.1 mol / L AlCl 3 Mix the solution and treat the surface of the electronic aluminum foil (light foil) at 60°C for 80 seconds;

[0041] (2) Nanocloth holes: place the aluminum foil obtained in step (1) under a specific waveform with a current density of 0.35~0.55A / cm², a frequency of 25-35Hz, a temperature of 35~45°C, and 2 mol / L of HCl , 0.1 mol / L AlCl 3 , 0~1 mol / LH 2 SO 4 , 0~1 mol / L H 3 PO 4 , 0~1 mol / L HNO 3 Take it out after 20 seconds in the mixed solution (electrocorrosive solution);

[0042] (3) Surface cleaning: put the aluminum foil obtained in step (2) into pure water at 20~35°C for 40 seconds and take it out;

[0043] (4) Repeat hole layout: Repeat step (2) and step (3) 1 to 3 times, and the specific process parameters can be adjusted appropriately;

[0044] (5) Deep electric corrosion: put the aluminum foil processed i...

Embodiment 3

[0049] Embodiment 3 Implement the present invention according to the following steps:

[0050] (1) Surface treatment: use 2.0 mol / L HCl and 0.3 mol / L AlCl 3 Mix the solution and treat the surface of the electronic aluminum foil (light foil) at 60°C for 80 seconds;

[0051] (2) Nanocloth holes: place the aluminum foil obtained in step (1) under a specific waveform with a current density of 0.35~0.55A / cm², a frequency of 25-35Hz, a temperature of 35~45°C, and 2 mol / L of HCl , 0.3 mol / L AlCl 3 , 0~1 mol / LH 2 SO 4 , 0~1 mol / L H 3 PO 4 , 0~1 mol / L HNO 3 Take it out after 20 seconds in the mixed solution (electrocorrosive solution);

[0052] (3) Surface cleaning: put the aluminum foil obtained in step (2) into pure water at 20~35°C for 40 seconds and take it out;

[0053] (4) Repeat hole layout: Repeat step (2) and step (3) 1 to 3 times, and the specific process parameters can be adjusted appropriately;

[0054] (5) Deep electric corrosion: put the aluminum foil processed i...

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Abstract

The present invention discloses an electronic aluminum foil energy conservation and environmental protection electrochemical corrosion expansion method, the method can not only significantly improve the efficiency of electric erosion, improves electrochemical corrosion expansion surface ratio ( namely specific volume of anode aluminum foil), reduces and combined hole and large hole, but also can save electric energy, reduce chemical consumption, increase the rate of utilization of waste liquid, and reduce waste liquid emissions, and also can further improve the stability and consistency of the products.

Description

technical field [0001] The invention relates to an electrochemical corrosion method for electronic aluminum foil, in particular to an energy-saving and environment-friendly electrochemical corrosion expansion method for electronic aluminum foil. Background technique [0002] As one of the storage containers for electric energy, capacitors play an important role in power supply filtering, signal filtering, coupling and decoupling, etc. Military, aerospace, automobile, medical equipment, consumer electronics and many other fields. Aluminum electrolytic capacitors are one of the irreplaceable members of the capacitor family because of their large capacity per unit volume, low price and good "self-healing" performance of aluminum oxide film. [0003] Aluminum electrolytic capacitor is a capacitor manufactured with special structure and special process. It is divided into two parts: anode and cathode. The capacitance is mainly determined by the anode aluminum foil. The capacitan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/04H01G9/055H01G9/045
Inventor 秦力王文宝陈宇峰谭惠忠全振浪
Owner GUANGDONG HUAFENG NEW ENERGY TECH CO LTD
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