CN101752095A - Method for etching holes by corroding aluminum foil - Google Patents

Method for etching holes by corroding aluminum foil Download PDF

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Publication number
CN101752095A
CN101752095A CN200910114673A CN200910114673A CN101752095A CN 101752095 A CN101752095 A CN 101752095A CN 200910114673 A CN200910114673 A CN 200910114673A CN 200910114673 A CN200910114673 A CN 200910114673A CN 101752095 A CN101752095 A CN 101752095A
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China
Prior art keywords
low
time
current density
change
aluminum foil
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Pending
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CN200910114673A
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Chinese (zh)
Inventor
宋洪洲
蔡小宇
陆雅军
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Guangxi Hezhou Guidong Electronic Technology Co Ltd
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Guangxi Hezhou Guidong Electronic Technology Co Ltd
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Priority to CN200910114673A priority Critical patent/CN101752095A/en
Publication of CN101752095A publication Critical patent/CN101752095A/en
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Abstract

The invention discloses a method for etching holes by eroding an aluminum foil, which comprises the steps of pretreatment, first level corrosion, second level corrosion, post treatment and drying. The first level corrosion comprises the following steps of: putting the aluminum foil after the pretreatment into mixed solution of hydrochloric acid and sulfuric acid, wherein the mixed solution contains 0.5 to 1.0 N/L of aluminum, the temperature of the mixed solution is between 65 and 90 DEG C and the total acidity of the mixed solution is 5.0 to 8.0 N/L; and applying 45 to 80 seconds of direct current of which the current density changes along with the time to perform electrolytic corrosion for etching the holes in mainly three modes that: one, the current density changes from high to low along with the time; two, the current density changes from low to high and then to low again; and three, the current density changes form low to high. The hole etching mode that the current density changes from high to low along with the time improves the specific volume by 7 to 12 percent compared with the existing hole etching method with constant current density under the premise of not reducing the mechanical strength of the aluminum foil.

Description

A kind of hole method of sending out of corrosive aluminum foil
Technical field
The present invention relates to the caustic solution of aluminum electrolysis capacitor anode aluminium foil, the hole method was sent out in the current density corrosion that causes the etched foil performance to change that changes in time when particularly the first order was sent out pitting corrosion in the aluminium foil electrolytic corrosion process.
Background technology
The electrolytic capacitor anode aluminium foil improves its unit are static capacity (specific volume) and plays decisive role to dwindling capacitor sizes.General aluminum foil erosion method flow process is: pre-treatment, one-level burn into secondary or multistage burn into reprocessing, oven dry.The purpose of one-level corrosion is to send out the hole promptly to make aluminium foil surface generate a large amount of equally distributed initial voids with certain depth as far as possible, in the hope of can obtain specific area to greatest extent after secondary reaming corrosion.Send out the purpose in hole for reaching the one-level corrosion, people are constantly exploring the method that the hole is sent out in corrosion always, especially a large amount of experiments is carried out in the prescription and the method control thereof of corrosive liquid, and obtained effect preferably, existing one-level corrosion research mainly is to corrode in corrosive liquid with the mode that constant current density powers up to send out the hole, the density of its initial voids and uniformity still have the leeway of further raising, and not seeing at present has the report of sending out the hole method that uses current density to change in time.
Summary of the invention
The purpose of this invention is to provide a kind of hole method of sending out of corrosive aluminum foil, this method can improve sends out hole density and uniformity, makes aluminium foil further improve specific volume under the prerequisite of not losing its mechanical strength.
The present invention achieves the above object by the following technical programs: a kind of hole method of sending out of corrosive aluminum foil, comprise pre-treatment, the reprocessing of one-level burn into secondary burn into, baking step, described one-level corrosion is 0.5~1.0N/L for the aluminium foil with pre-treatment places aluminium content, temperature is 65~90 ℃, total acidity is in the mixed liquor of the hydrochloric acid of 5.0~8.0N/L and sulfuric acid, applies direct current that 45~80 seconds current density changes in time and carries out electrolytic corrosion and send out the hole.
The described time dependent direct current of current density that applies carries out electrolytic corrosion and sends out the hole, mainly contains 3 kinds of modes: the one, and variable-current density changes from high to low in time, and the 2nd, arrive low the variation from low to high again, the 3rd, change from low to high.
The described density of variable-current in time changes from high to low, is that variable-current density changes from high to low and is generally from 2000mA/cm in time 2~1500mA/cm 2Change to 200mA/cm 2~50mA/cm 2, the time is to change in 80 seconds.
The described density of variable-current in time is generally from 200mA/cm to low the variation from low to high again 2Change to 1500mA/cm 2Change to 100mA/cm again 2, the time is to change in 80 seconds,
The described density of variable-current in time changes from low to high, is generally from 200mA/cm 2Change to 1500mA/cm 2, the time is to change in 80 seconds.
The one-level corrosion electric current density outstanding effect of the present invention that changes in time is:
One-level corrosion is adopted in time variable-current density to change from high to low to add galvano-cautery to obtain more high density and is had the initial voids of certain depth uniformly, by increasing the specific area of aluminium foil, the aluminium foil specific volume is greatly improved, under the prerequisite that does not reduce the aluminium foil mechanical strength, sends out hole method specific volume and improve 7~12% than existing constant current density.
Description of drawings
Fig. 1 is first kind of one-level forms of corrosion schematic diagram sending out the hole method of corrosive aluminum foil of the present invention.
Fig. 2 is second kind of one-level forms of corrosion schematic diagram sending out the hole method of corrosive aluminum foil of the present invention.
Fig. 3 is the third one-level forms of corrosion schematic diagram of sending out the hole method of corrosive aluminum foil of the present invention.
Embodiment
Below by drawings and Examples technical scheme of the present invention is described further.
The method flow of corrosive aluminum foil of the present invention comprises pre-treatment, the reprocessing of one-level burn into secondary burn into, oven dry.The processing mode of pre-treatment in the implementation process of sending out the hole method of corrosive aluminum foil of the present invention, the reprocessing of secondary burn into is all identical.
1. pre-treatment: aluminium foil is placed on containing of 40~65 ℃ of temperature soaked in 10~25wt% phosphoric acid solution 60~180 seconds, take out clean with pure water rinsing, to remove aluminium foil surface impurity and greasy dirt.
2. one-level corrosion: it is 0.5~1.0N/L that the aluminium foil of pre-treatment is placed aluminium content, temperature is 65~90 ℃, total acidity is in the mixed liquor of the hydrochloric acid of 5.0~8.0N/L and sulfuric acid, applies direct current that 45~80 seconds current density changes in time and carries out electrolytic corrosion and send out the hole.
3. secondary corrosion: will place temperature through the etched foil of one-level corrosion treatment is 65~85 ℃, contains in 3~15wt% salpeter solution, applies 80~250mA/cm 2Direct current carried out the electrolytic corrosion reaming 350~800 seconds.
4. reprocessing: it is 60~75 ℃ that the aluminium foil of secondary corrosion treatment is placed temperature, contains and soaks in 1~8wt% salpeter solution 45~150 seconds, take out clean with pure water rinsing, to remove the aluminium foil surface remaining impurities.
5. oven dry: will be put in 80~150 ℃ the baking oven through the etched foil after the cleaning and dry by the fire 480~720 seconds.
Below 5 embodiment only be that one-level corrosion in the 2nd step applies the direct current that current density changes in time and carries out the different instances that the hole is sent out in electrolytic corrosion, 4 steps that all the other steps are same as above.
Embodiment 1
The aluminium foil of pre-treatment is put into the one-level etchant solution, apply current density from high to low by Fig. 1 mode, by 2000mA/cm 2Change to 100mA/cm 2Direct current corroded 45 seconds, put into the secondary etchant solution after cleaning up with pure water and add the galvano-cautery reaming, carry out reprocessing after cleaning up with pure water again, after reprocessing, take out and clean up oven dry with pure water.
Embodiment 2
The aluminium foil of pre-treatment is put into the one-level etchant solution, apply current density from high to low by Fig. 1 mode, by 1500mA/cm 2Change to 50mA/cm 2Direct current corroded 65 seconds, put into the secondary etchant solution after cleaning up with pure water and add the galvano-cautery reaming, carry out reprocessing after cleaning up with pure water again, after reprocessing, take out and clean up oven dry with pure water.
Embodiment 3
The aluminium foil of pre-treatment is put into the one-level etchant solution, apply current density from high to low by Fig. 1 mode, by 1500mA/cm 2Change to 200mA/cm 2Direct current corroded 80 seconds, put into the secondary etchant solution after cleaning up with pure water and add the galvano-cautery reaming, carry out reprocessing after cleaning up with pure water again, after reprocessing, take out and clean up oven dry with pure water.
Embodiment 4
The aluminium foil of pre-treatment is put into the one-level etchant solution, by Fig. 2 mode apply current density arrive again from low to high low, by 200mA/cm 2Change to 1500mA/cm 2Change to 100mA/cm again 2Direct current corroded 80 seconds, put into the secondary etchant solution after cleaning up with pure water and add the galvano-cautery reaming, carry out reprocessing after cleaning up with pure water again, after reprocessing, take out and clean up oven dry with pure water.
Embodiment 5
The aluminium foil of pre-treatment is put into the one-level etchant solution, apply current density from high to low by Fig. 3 mode, by 200mA/cm 2Change to 1500mA/cm 2Direct current corroded 80 seconds, put into the secondary etchant solution after cleaning up with pure water and add the galvano-cautery reaming, carry out reprocessing after cleaning up with pure water again, after reprocessing, take out and clean up oven dry with pure water.
Comparative Examples
The aluminium foil of pre-treatment is put into the one-level etchant solution, and applying constant current density is 700mA/cm 2Direct current corroded 80 seconds, put into the secondary etchant solution after cleaning up with pure water and add the galvano-cautery reaming, carry out reprocessing after cleaning up with pure water again, after reprocessing, take out and clean up oven dry with pure water.
In the condition of changing into be: 10% boric acid, 90 ℃, 0.05A/cm 2, after changing under the Vfe=520V, the etched foil testing result is as follows:
The hole method is sent out in corrosion 520Vf capacity (μ F/cm 2) Tensile strength N/cm
Embodiment 1 ??0.759 ??23.6
Embodiment 2 ??0.766 ??23.7
Embodiment 3 ??0.802 ??23.7
Embodiment 4 ??0.766 ??23.8
Embodiment 5 ??0.769 ??24.1
Comparative Examples ??0.705 ??23.5
From the performance comparison of embodiments of the invention and Comparative Examples as can be seen, by using the hole mode of sending out of current density descending variation in time, under the prerequisite that does not reduce the aluminium foil mechanical strength, can improve aluminium foil and send out hole density and uniformity, further improve the specific volume of etched foil.

Claims (3)

1. the hole method of sending out of a corrosive aluminum foil, comprise pre-treatment, the reprocessing of one-level burn into secondary burn into, baking step, it is characterized in that, described one-level corrosion is 0.5~1.0N/L for the aluminium foil with pre-treatment places aluminium content, temperature is 65~90 ℃, total acidity is in the mixed liquor of the hydrochloric acid of 5.0~8.0N/L and sulfuric acid, applies direct current that 45~80 seconds current density changes in time and carries out electrolytic corrosion and send out the hole.
2. the hole method of sending out of corrosive aluminum foil according to claim 1, it is characterized in that, the described time dependent direct current of current density that applies carries out electrolytic corrosion and sends out the hole, mainly contain 3 kinds of modes: the one, variable-current density changes from high to low in time, the 2nd, arrive low the variation from low to high again, the 3rd, change from low to high.
3. the hole method of sending out of corrosive aluminum foil according to claim 1 is characterized in that the described density of variable-current in time changes from high to low, is that variable-current density changes from high to low and is generally from 2000mA/cm in time 2~1500mA/cm 2Change to 200mA/cm 2~50mA/cm 2, the time is to change in 40~80 seconds.
The described density of variable-current in time is generally from 200mA/cm to low the variation from low to high again 2Change to 1500mA/cm 2Change to 100mA/cm again 2, the time is to change in 80 seconds,
The described density of variable-current in time changes from low to high, is generally from 200mA/cm 2Change to 1500mA/cm 2, the time is to change in 80 seconds.
CN200910114673A 2009-12-28 2009-12-28 Method for etching holes by corroding aluminum foil Pending CN101752095A (en)

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Cited By (15)

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CN102082050A (en) * 2010-11-29 2011-06-01 广西贺州市桂东电子科技有限责任公司 Deep corrosion method of electrode aluminum foil for flash lamp
CN103578766A (en) * 2012-07-23 2014-02-12 东莞市长安东阳光铝业研发有限公司 Turning speed improving process during corrosion for electronic plain foil
CN103774193A (en) * 2014-01-06 2014-05-07 广西贺州市桂东电子科技有限责任公司 Method for electrolytic-depositing dispersed zinc crystal nucleuses on surface of medium-high voltage electronic aluminum foil
CN104878441A (en) * 2015-04-30 2015-09-02 聊城大学 Corrosion process for anode aluminum foil with tunnel branched holes for aluminum electrolytic capacitor
CN105401209A (en) * 2015-12-09 2016-03-16 广西贺州市桂东电子科技有限责任公司 Corrosion pretreatment method for middle-high voltage anode aluminum foil
CN105845459A (en) * 2016-03-18 2016-08-10 四川美嘉豹新能源科技有限公司 Manufacturing method of porous copper foil used for lithium-ion capacitor current collector
CN107177879A (en) * 2017-03-21 2017-09-19 广东宇彤创业投资有限公司 A kind of preparation method of perforated foil
CN107254707A (en) * 2017-06-16 2017-10-17 李晓天 A kind of manufacture method of the quick middle-high voltage electrode foil of multistage hair engaging aperture
CN107254708A (en) * 2017-06-23 2017-10-17 乳源县立东电子科技有限公司 The method of two sections of cloth holes of low voltage anode aluminum foil
CN108179326A (en) * 2018-01-30 2018-06-19 内蒙古工业大学 It is a kind of using hair engaging aperture made with aluminum foil for the method for graphene aluminum matrix composite
CN109554746A (en) * 2018-12-26 2019-04-02 乳源瑶族自治县东阳光化成箔有限公司 A kind of preparation method of high-voltage high specific capacitance etched foil
CN109797424A (en) * 2018-12-28 2019-05-24 广西贺州市桂东电子科技有限责任公司 A kind of method handled in mesohigh anode aluminium foil Pyatyi hair engaging aperture corrosion
CN110923779A (en) * 2019-11-27 2020-03-27 东莞东阳光科研发有限公司 Ultrahigh pressure etched foil and etching method thereof
CN111733443A (en) * 2020-05-22 2020-10-02 东莞东阳光科研发有限公司 Method for manufacturing electrode foil for aluminum electrolytic capacitor and electrode foil
CN111748839A (en) * 2020-06-24 2020-10-09 东莞东阳光科研发有限公司 Preparation method of medium-high voltage corrosion foil for aluminum electrolytic capacitor and anode foil

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102082050B (en) * 2010-11-29 2013-01-23 广西贺州市桂东电子科技有限责任公司 Deep corrosion method of electrode aluminum foil for flash lamp
CN102082050A (en) * 2010-11-29 2011-06-01 广西贺州市桂东电子科技有限责任公司 Deep corrosion method of electrode aluminum foil for flash lamp
CN103578766B (en) * 2012-07-23 2017-08-11 东莞东阳光科研发有限公司 A kind of electronic light paper tinsel corrosion puies forward speed technique
CN103578766A (en) * 2012-07-23 2014-02-12 东莞市长安东阳光铝业研发有限公司 Turning speed improving process during corrosion for electronic plain foil
CN103774193A (en) * 2014-01-06 2014-05-07 广西贺州市桂东电子科技有限责任公司 Method for electrolytic-depositing dispersed zinc crystal nucleuses on surface of medium-high voltage electronic aluminum foil
CN103774193B (en) * 2014-01-06 2016-09-21 广西贺州市桂东电子科技有限责任公司 A kind of method of mesohigh electric aluminum foil surface electro-deposition disperse zinc nucleus
CN104878441A (en) * 2015-04-30 2015-09-02 聊城大学 Corrosion process for anode aluminum foil with tunnel branched holes for aluminum electrolytic capacitor
CN105401209A (en) * 2015-12-09 2016-03-16 广西贺州市桂东电子科技有限责任公司 Corrosion pretreatment method for middle-high voltage anode aluminum foil
CN105845459B (en) * 2016-03-18 2018-05-25 四川美嘉豹新能源科技有限公司 A kind of preparation method of lithium-ion capacitor collector porous copper foil
CN105845459A (en) * 2016-03-18 2016-08-10 四川美嘉豹新能源科技有限公司 Manufacturing method of porous copper foil used for lithium-ion capacitor current collector
CN107177879B (en) * 2017-03-21 2021-04-09 广东宇彤创业投资有限公司 Manufacturing method of perforated foil
CN107177879A (en) * 2017-03-21 2017-09-19 广东宇彤创业投资有限公司 A kind of preparation method of perforated foil
CN107254707B (en) * 2017-06-16 2020-06-26 李晓天 Method for manufacturing multi-stage pore-forming rapid medium-high voltage electrode foil
CN107254707A (en) * 2017-06-16 2017-10-17 李晓天 A kind of manufacture method of the quick middle-high voltage electrode foil of multistage hair engaging aperture
CN107254708A (en) * 2017-06-23 2017-10-17 乳源县立东电子科技有限公司 The method of two sections of cloth holes of low voltage anode aluminum foil
CN108179326A (en) * 2018-01-30 2018-06-19 内蒙古工业大学 It is a kind of using hair engaging aperture made with aluminum foil for the method for graphene aluminum matrix composite
CN109554746B (en) * 2018-12-26 2020-08-04 乳源瑶族自治县东阳光化成箔有限公司 Method for manufacturing high-pressure high-specific-volume corrosion foil
CN109554746A (en) * 2018-12-26 2019-04-02 乳源瑶族自治县东阳光化成箔有限公司 A kind of preparation method of high-voltage high specific capacitance etched foil
CN109797424A (en) * 2018-12-28 2019-05-24 广西贺州市桂东电子科技有限责任公司 A kind of method handled in mesohigh anode aluminium foil Pyatyi hair engaging aperture corrosion
CN109797424B (en) * 2018-12-28 2021-08-10 广西贺州市桂东电子科技有限责任公司 Method for treating five-level pore formation corrosion of medium-high voltage anode aluminum foil
CN110923779A (en) * 2019-11-27 2020-03-27 东莞东阳光科研发有限公司 Ultrahigh pressure etched foil and etching method thereof
CN111733443A (en) * 2020-05-22 2020-10-02 东莞东阳光科研发有限公司 Method for manufacturing electrode foil for aluminum electrolytic capacitor and electrode foil
CN111733443B (en) * 2020-05-22 2021-07-16 东莞东阳光科研发有限公司 Method for manufacturing electrode foil for aluminum electrolytic capacitor and electrode foil
CN111748839A (en) * 2020-06-24 2020-10-09 东莞东阳光科研发有限公司 Preparation method of medium-high voltage corrosion foil for aluminum electrolytic capacitor and anode foil

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Open date: 20100623