CN101740227A - Anode aluminium foil after treatment method for aluminium electrolytic capacitor - Google Patents
Anode aluminium foil after treatment method for aluminium electrolytic capacitor Download PDFInfo
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- CN101740227A CN101740227A CN200910114674A CN200910114674A CN101740227A CN 101740227 A CN101740227 A CN 101740227A CN 200910114674 A CN200910114674 A CN 200910114674A CN 200910114674 A CN200910114674 A CN 200910114674A CN 101740227 A CN101740227 A CN 101740227A
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Abstract
The invention relates to an anode aluminium foil after treatment method for an aluminium electrolytic capacitor, comprising the steps: pretreatment, first-grade corrosion A, second-grade corrosion B1, second-grade corrosion B2, after treatment and drying of corrosion foil, wherein the after treatment comprises the steps of chemical cleaning and ultrasonic cleaning; the after treatment comprises the steps of: putting aluminium foil processed by the second-grade corrosion B2 into 0.3-5wt% nitric acid solution at the temperature of 30-85 DEG C, and performing ultrasonic treatment for 5-60s at the ultrasonic frequency of 1-50KHz and the power of 0.5-5KW. Compared with the electrode corrosion foil prepared by the original technique, the electrostatic capacity of the cleaned anode aluminium corrosion foil is increased by 1-3%, and the pressure rising time is shortened by 6-12%.
Description
One, technical field
The present invention relates to a kind of aluminum electrolysis capacitor anode aluminum foil erosion method, the cleaning method in particularly a kind of aluminum electrolysis capacitor anode aluminium foil corrosion process.
Two, background technology
The corrosion production procedure of aluminum electrolysis capacitor anode foil generally comprises following steps: the pre-treatment of light paper tinsel, one-level are sent out pitting corrosion, secondary reaming burn into reprocessing (cleaning), oven dry, etched foil.Each big manufacturing enterprise is in order to enlarge the effective ratio area of aluminum electrolysis capacitor anode aluminium foil, increase the static capacity (specific volume) of unit are, technology has been carried out bigger improvement, as improve the technical recipe of pre-treatment, the technical recipe of electrochemical corrosion and the time ratio of number of poles, a hole and reaming etc. and all done significant improvement, on the additive of sending out hole and reaming soup uses, actively research and develop especially and use especially.But present report or pertinent literature at home is less relatively in the aftertreatment technology research and development, technical recipe is also comparatively general, just under finite concentration and temperature, eliminate chloride ion in aluminium foil surface metal remained impurity and the pit, but the aluminium hydroxide and the surperficial aluminium powder that deposit in pit in elimination act on basically not quite with nitric acid or sulfuric acid.
Three, summary of the invention
The purpose of this invention is to provide a kind of anode aluminium foil after treatment method for aluminium electrolytic capacitor, it can solve the technical problem that prior art can not effectively reduce etched foil surface aluminium powder and hole endoparticle powder impurity, can improve the static capacity of anode aluminium foil, again can be under the situation that reduces etched foil surface powder, the unstable problem of volume riveted joint before and after when effectively solving formation energy-endowing production, shortening simultaneously changes into the pressure rising time of paper tinsel.
The present invention achieves the above object by the following technical programs: a kind of anode aluminium foil after treatment method for aluminium electrolytic capacitor, being to increase ultrasonic waves for cleaning after aluminium foil is finished the prime galvanic corrosion when entering reprocessing, promptly is that this reprocessing is carried out chemical cleaning and ultrasonic waves for cleaning to etched foil simultaneously.Its method step is as follows:
Pre-treatment → one-level corrosion A → secondary corrosion B1 → secondary corrosion B2 → reprocessing comprises chemical cleaning and ultrasonic waves for cleaning → oven dry → etched foil.
Described pre-treatment is: aluminium foil is placed in the mixed liquor that contains 1～10wt% hydrochloric acid and 20～40wt% sulfuric acid of 60 ℃～90 ℃ of temperature and soaked 30～150 seconds.
One-level corrosion A: it is 65～85 ℃ that the aluminium foil of pre-treatment is placed on temperature, contains in the mixed liquor of 1～15wt% hydrochloric acid and 10～40wt% sulfuric acid, and applying current density is 300～1000mA/cm
2Direct current carried out electrolytic corrosion 40～240 seconds.
Secondary corrodes B1: be placed in temperature to be 60～85 ℃, to contain in 1～10wt% hydrochloric acid or the 5～15wt% salpeter solution that applying current density is 40～200mA/cm after the aluminium foil after the one-level corrosion is cleaned up with pure water
2Direct current carried out electrolytic corrosion 300～1000 seconds.
Secondary corrosion B2: it is 60～85 ℃ that the etched foil that will handle through secondary corrosion B1 at last is placed on temperature, contains in 1～10wt% hydrochloric acid or the 5～15wt% salpeter solution, and applying current density is 40～200mA/cm
2Direct current carried out electrolytic corrosion 300～1000 seconds.
Reprocessing: secondary is corroded aluminium foil that B2 handled, and to be placed on temperature be 30～85 ℃, contains that to use ultrasonic frequency in 0.3～5wt% salpeter solution be that 1～50KHz, power are 0.5～5KW sonicated 5～60 seconds.
The invention has the beneficial effects as follows:
Adopt anode aluminium foil after treatment method for aluminium electrolytic capacitor of the present invention, the static capacity of the anodic attack paper tinsel after the cleaning improves 1～3% than the electrode corrosion paper tinsel of original prepared, shortens 6～12% pressure rising time.And the electrode corrosion paper tinsel can effectively reduce postorder and change into the problem that connects the disconnected paper tinsel of the unstable generation of paper tinsel riveted joint when producing, and improving the quality of products reduces cost.
Description of drawings
Fig. 1 to Fig. 3 is the aluminium foil scanned photograph that adopts anode aluminium foil after treatment method for aluminium electrolytic capacitor of the present invention.
Fig. 4 is for adopting the aluminium foil scanned photograph of existing treatment process.
Four, embodiment
By the following examples technical scheme of the present invention is further described.
Embodiment 1
Early-stage preparations: at first aluminium foil is put in the pretreatment liquid and to be soaked 120 seconds, put into again after cleaning up with pure water and once corrode A liquid and pass to 470mA/cm
2Current processing 120 seconds, clean up with pure water and to put into anticaustic B1 liquid again and pass to 80mA/cm
2Current processing 360 seconds, clean up with pure water and to put into anticaustic B2 liquid again and pass to 80mA/cm
2Current processing 360 seconds, clean up with pure water and to obtain the etched foil in early stage.Following reprocessing uses paper tinsel to be through the paper tinsel after the above processing, is called for short the etched foil in early stage.
Reprocessing: will early stage etched foil to put into liquid temp be 30 ℃, contain to use ultrasonic frequency to be 0.5KW, sonicated 60 seconds in the 5wt% salpeter solution as 1KHz, power, take out and clean up the back with pure water and dry.
Embodiment 2
The early-stage preparations condition is with embodiment 1.
Reprocessing: will early stage etched foil to put into temperature be 40 ℃, contain to use ultrasonic frequency to be 1.5KW, sonicated 45 seconds in the 4wt% salpeter solution as 11KHz, power, take out and clean up the back with pure water and dry.
Embodiment 3
The early-stage preparations condition is with embodiment 1.
Reprocessing: will early stage etched foil to put into temperature be 50 ℃, contain to use ultrasonic frequency to be 3.0KW sonicated 45 seconds in the 4wt% salpeter solution as 20KHz, power, take out and clean up the back with pure water and dry.
Embodiment 4
The early-stage preparations condition is with embodiment 1.
Reprocessing: will early stage etched foil to put into the aftertreatment fluid temperature be 60 ℃, contain to use ultrasonic frequency to be 4.0KW sonicated 45 seconds in the 3wt% salpeter solution as 35KHz, power, take out and clean up the back with pure water and dry.
Embodiment 5
The early-stage preparations condition is with embodiment 1.
Reprocessing: will early stage etched foil to put into the aftertreatment fluid temperature be 85 ℃, contain to use ultrasonic frequency to be 5.0KW sonicated 30 seconds in the 1.5wt% salpeter solution as 50KHz, power, take out and clean up the back with pure water and dry.
Embodiment 6
The early-stage preparations condition is with embodiment 1.
Reprocessing: will early stage etched foil to put into the aftertreatment fluid temperature be 55 ℃, contain to use ultrasonic frequency to be 4.0KW, sonicated 5 seconds in the 0.3wt% salpeter solution as 15KHz, power, take out and clean up the back with pure water and dry.
Embodiment 7
The early-stage preparations condition is with embodiment 1.
Reprocessing: will early stage etched foil to put into the aftertreatment fluid temperature be 55 ℃, contain to use ultrasonic frequency to be 1.5KW sonicated 60 seconds in the 5wt% salpeter solution as 20KHz, power, take out and clean up the back with pure water and dry.
Comparative Examples: will early stage etched foil to put into the aftertreatment fluid temperature be 60 ℃, contain the 5wt% salpeter solution and handled 60 seconds, take out with pure water and clean up the back oven dry.
Change into testing conditions: 10% boric acid, 90 ℃, 0.05A/cm
2, Vfe=520V.
The result is as shown in table 1:
Table 1
| Embodiment | 520Vf detects capacity (μ) | Change into paper tinsel (530VF) pressure rising time |
| Embodiment 1 | ?0.668 | ?144 |
| Embodiment 2 | ?0.665 | ?142 |
| Embodiment 3 | ?0.683 | ?135 |
| Embodiment 4 | ?0.675 | ?138 |
| Embodiment 5 | ?0.673 | ?143 |
| Embodiment 6 | ?0.676 | ?145 |
| Embodiment 7 | ?0.666 | ?144 |
| Embodiment 8 is a Comparative Examples | ?0.663 | ?149 |
Embodiment 1 to 7 is for adopting anode aluminium foil after treatment method for aluminium electrolytic capacitor of the present invention, and Comparative Examples is existing treatment process.
Find out from the testing result that changes into of table 1, adopt anode aluminium foil after treatment method for aluminium electrolytic capacitor of the present invention, the static capacity of the anodic attack paper tinsel after the cleaning improves 1～3% than the electrode corrosion paper tinsel of original prepared, shortens 6～12% pressure rising time.
Below compare by the photo that obtains with electron microscope scanning aluminium foil embodiment 3,4,5 and Comparative Examples.
Fig. 1,2, the 3rd wherein adopts the aluminium foil scanned photograph of anode aluminium foil after treatment method for aluminium electrolytic capacitor of the present invention, and Fig. 4 is for adopting the aluminium foil scanned photograph of existing treatment process.
From photo as can be seen, adopt the aluminium foil of anode aluminium foil after treatment method for aluminium electrolytic capacitor of the present invention to compare with the aluminium foil that adopts existing treatment process, picture 1,2,3 surface state are than picture 4 few velvet-like aluminum substrates, picture 1,2,3 surface hole defects are clear, stop up and lack, and the obstruction of picture 4 surface hole defects is many, velvet-like aluminum substrate is many, surface irregularity influences overall performance.
Claims (1)
1. anode aluminium foil after treatment method for aluminium electrolytic capacitor, comprise pre-treatment, one-level corrosion A, secondary corrosion B1, secondary corrosion B2, reprocessing, oven dry etched foil step, it is characterized in that, described reprocessing comprises chemical cleaning and ultrasonic waves for cleaning, described reprocessing is secondary to be corroded aluminium foil that B2 handled to be placed on temperature be 30～85 ℃, contains that to use ultrasonic frequency in 0.3～5wt% salpeter solution be that 1～50KHz, power are 0.5～5KW sonicated 5～60 seconds.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061508A (en) * | 2010-12-03 | 2011-05-18 | 浙江丰川电子科技有限公司 | Corrosion covering method of medium and high voltage electrode foil |
| 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 |
| CN103774197A (en) * | 2014-01-06 | 2014-05-07 | 广西贺州市桂东电子科技有限责任公司 | Medium and high-pressure etched foil post-treatment method |
| CN105200509A (en) * | 2015-09-01 | 2015-12-30 | 广西贺州市桂东电子科技有限责任公司 | Cleaning method of electronic energy storage materials |
| 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 |
| CN105420803A (en) * | 2015-11-27 | 2016-03-23 | 广西贺州市桂东电子科技有限责任公司 | Method for ultrasonic-assisted corrosion of middle-high voltage anode aluminum foil |
| CN105551805A (en) * | 2016-01-18 | 2016-05-04 | 南通海星电子股份有限公司 | Intermediate processing method of electrode foil for middle-high voltage aluminium electrolytic capacitor |
| CN108155017A (en) * | 2016-12-02 | 2018-06-12 | 东莞东阳光科研发有限公司 | A kind of processing method of electrode foil for aluminum electrolytic capacitors |
| CN110718393A (en) * | 2019-10-31 | 2020-01-21 | 湖南艾华集团股份有限公司 | Preparation method of anode foil of medium-high voltage aluminum electrolytic capacitor and capacitor |
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2009
- 2009-12-28 CN CN200910114674A patent/CN101740227A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN102061508A (en) * | 2010-12-03 | 2011-05-18 | 浙江丰川电子科技有限公司 | Corrosion covering method of medium and high voltage electrode foil |
| CN103774197A (en) * | 2014-01-06 | 2014-05-07 | 广西贺州市桂东电子科技有限责任公司 | Medium and high-pressure etched foil post-treatment method |
| CN105200509A (en) * | 2015-09-01 | 2015-12-30 | 广西贺州市桂东电子科技有限责任公司 | Cleaning method of electronic energy storage materials |
| CN105200509B (en) * | 2015-09-01 | 2018-04-10 | 广西贺州市桂东电子科技有限责任公司 | A kind of cleaning method of electron stored energy material |
| CN105420803A (en) * | 2015-11-27 | 2016-03-23 | 广西贺州市桂东电子科技有限责任公司 | Method for ultrasonic-assisted corrosion of middle-high voltage anode aluminum foil |
| 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 |
| CN105551805A (en) * | 2016-01-18 | 2016-05-04 | 南通海星电子股份有限公司 | Intermediate processing method of electrode foil for middle-high voltage aluminium electrolytic capacitor |
| CN108155017A (en) * | 2016-12-02 | 2018-06-12 | 东莞东阳光科研发有限公司 | A kind of processing method of electrode foil for aluminum electrolytic capacitors |
| CN110718393A (en) * | 2019-10-31 | 2020-01-21 | 湖南艾华集团股份有限公司 | Preparation method of anode foil of medium-high voltage aluminum electrolytic capacitor and capacitor |
| CN110718393B (en) * | 2019-10-31 | 2021-11-30 | 湖南艾华集团股份有限公司 | Preparation method of anode foil of medium-high voltage aluminum electrolytic capacitor and capacitor |
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