A method of making corroded foil

A manufacturing method and technology for corroding foils, applied in capacitors, circuits, electrical components, etc., can solve the problems of complex annealing heat treatment process, inability to realize automatic industrial production, and no practicability, and achieve uniform pore effect, convenient operation, and improvement. Effects of processing steps

Active Publication Date: 2022-03-25
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the annealing heat treatment process is complicated, and it cannot realize automatic industrial production, so it is not practical

Method used

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  • A method of making corroded foil

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Experimental program
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Effect test

Embodiment 1

[0019] In an embodiment of the present invention, a method for manufacturing an etched foil includes five steps of pretreatment of high-purity aluminum foil, primary porosity corrosion, secondary porosity corrosion, hole expansion corrosion, and post-treatment. The pretreatment is Soak the aluminum foil in the pretreatment solution for 60s; after cleaning it, put it in the primary corrosion mixture at a temperature of 70°C, and apply a current density of 1500mA / cm 2 Electrolytic corrosion with direct current for 65s, cleaned with pure water, placed in a 10% hydrochloric acid solution, and chemically etched for 300s; finally cleaned with pure water and placed in an oven at 100°C for drying Just dry.

[0020] Wherein, the first-level porosity corrosion is to place the pretreated aluminum foil in a first-level porosity corrosion solution at a temperature of 70°C, and apply a current density of 1500mA / cm 2 The direct current was used to perform porosity corrosion for 65s, and the...

Embodiment 2

[0029] In an embodiment of the present invention, a method for manufacturing an etched foil includes five steps of pretreatment of high-purity aluminum foil, primary porosity corrosion, secondary porosity corrosion, hole expansion corrosion, and post-treatment. The pretreatment is Soak the aluminum foil in the pretreatment solution for 65s; after cleaning it, put it in the primary corrosion mixture with a temperature of 80°C, and apply a current density of 1800mA / cm 2 Perform electrolytic corrosion with direct current for 70s, clean it with pure water, put it into a 11% hydrochloric acid solution, and carry out chemical corrosion for 350s; finally clean it with pure water and put it in an oven with a temperature of 120°C for drying Just dry.

[0030] Wherein, the first-level porosity corrosion is to place the pretreated aluminum foil in a first-level porosity corrosion solution at a temperature of 80°C, and apply a current density of 1800mA / cm 2 The direct current was used to...

Embodiment 3

[0039] In an embodiment of the present invention, a method for manufacturing an etched foil includes five steps of pretreatment of high-purity aluminum foil, primary porosity corrosion, secondary porosity corrosion, hole expansion corrosion, and post-treatment. The pretreatment is Soak the aluminum foil in the pretreatment solution for 70s; after cleaning it, put it in the primary corrosion mixture with a temperature of 85°C, and apply a current density of 2100mA / cm 2 Perform electrolytic corrosion with direct current for 75s, clean it with pure water, put it into a 12% hydrochloric acid solution, and carry out chemical corrosion for 400s; finally clean it with pure water and put it in an oven with a temperature of 150°C for drying Just dry.

[0040] Wherein, the first-level porosity corrosion is to place the pretreated aluminum foil in a first-level porosity corrosion solution at a temperature of 85°C, and apply a current density of 2100mA / cm 2 The porosity corrosion was car...

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Abstract

The invention discloses a manufacturing method of corroded foil, which comprises five steps of pretreatment, primary corroding of pores, secondary corroding of pores, corroding of expanding pores and post-treatment of high-purity aluminum foil. The pre-treatment includes: soaking the aluminum foil in the pre-treatment solution for 60-70s; after cleaning it, put it in the primary corrosion mixture at a temperature of 70-85°C, and apply a current density of 1800mA / cm 2 Electrolytic corrosion with direct current for 65-75s, cleaned with pure water, placed in a hydrochloric acid solution containing 10%-12% at a temperature of 60-90°C, and chemically corroded for 300-400s; finally cleaned with pure water and then placed Dry in an oven at 100-150°C; the pre-treatment process is simple and easy to operate. The two treatment steps of porosity corrosion are adjusted, so that the porosity effect is uniform, the dispersion rate of the corroded foil for aluminum electrolytic capacitors is greatly reduced, and the bending performance is improved. The post-treatment processing step is improved so that it does not need to be annealed, and the continuous production of etched foil can be realized.

Description

technical field [0001] The invention relates to the technical field of corroded foil production, in particular to a method for producing corroded foil. Background technique [0002] The prior art discloses a manufacturing process of medium corrosion foil, which includes five steps of pretreatment of high-purity aluminum foil, primary pit corrosion, secondary pit corrosion, hole expansion corrosion and post-treatment. The production of corroded foil The pretreatment described in the method is to put the aluminum foil into the pretreatment solution and soak it for 40-50s; after cleaning it, put it in the primary corrosion mixture at a temperature of 80-90°C, and clean it with pure water Put it in the temperature of 70-80°C, put it into the bath solution containing 2% nitric acid, and apply the current density of 0.15 A / cm to corrode the foil 2 The direct current is electrolytically corroded for 500-600s; the post-treatment adopts two stages of annealing heat treatment at diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/045H01G9/055C25F3/04
CPCH01G9/045H01G9/055C25F3/04
Inventor 杨富国陆文健钟峻韬王燕芳邓敏滔庒凯彬江露莹苏晓锋李旭涛
Owner FOSHAN UNIVERSITY
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