CN106637380A - Middle and high voltage electronic aluminium foil corrosion method - Google Patents
Middle and high voltage electronic aluminium foil corrosion method Download PDFInfo
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- CN106637380A CN106637380A CN201611148177.1A CN201611148177A CN106637380A CN 106637380 A CN106637380 A CN 106637380A CN 201611148177 A CN201611148177 A CN 201611148177A CN 106637380 A CN106637380 A CN 106637380A
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- corrosion
- high voltage
- aluminium foil
- corrosion method
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/04—Etching of light metals
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a middle and high voltage electronic aluminium foil corrosion method. The middle and high voltage electronic aluminium foil corrosion method comprises the steps of preprocessing high purity aluminum foil, electrolytic-corroding (including creating hole corrosion and expanding hole corrosion), postprocessing, and drying. The electrolytic corrosion method is a ranging distance corrosion method. The electrolytic corrosion method comprises the step that the preprocessed high purity aluminium foil is put between two cambered-surface rectangular graphite pole plates to conduct creating hole corrosion and expanding hole corrosion, wherein the radius of curvature of each graphite pole plate is 45-310 cm, and the minimum distance between the aluminium foil and each pole plate is 10-20 cm. By means of the middle and high voltage electronic aluminium foil corrosion method, the problems of uneven current density distribution, uneven corrosion, high dispersion ratio of capacitance, consistency deviation and the like in the existing corrosion method can be solved, and the aluminium foil with high quality is prepared.
Description
Technical field
The invention belongs to electronic material manufacturing technology field, and in particular to a kind of medium-high voltage electronic aluminum foil corrosion method.
Background technology
Medium-high voltage electronic aluminum foil corrosion technique is exactly to carry out electrolytic etching by the high-purity aluminum foil to having { 100 } texture,
Hair engaging aperture, reaming, expand its specific surface area, obtain meeting the etched foil of certain specification requirement.Corrosion process generally comprise pre-treatment,
The steps such as the post processing of hair engaging aperture burn into reaming burn into, drying；Wherein hair engaging aperture corrosion and reaming corrosion is that aluminium foil obtains surface pit
Be evenly distributed, size（Aperture, hole are long）The high key of rational Tunnel-hole, capacitance uniformity.And electric current distribution is
Hair engaging aperture, reaming corrosion are affected, the conforming main cause of capacitance is affected.
In existing caustic solution, hair engaging aperture corrosion is all that high-purity aluminum foil is placed in into two pieces of parallel planes is rectangular with reaming corrosion
Electrochemical corrosion is carried out in the middle of shape graphite electrode plate, in corrosion electrolyte, the etched foil for meeting certain specification requirement is obtained.Entirely
Corrosion process, aluminium foil is parallel with pole plate, i.e., the distance between aluminium foil whole surface and graphite electrode plate are equal.It is this " equidistant
From " forms of corrosion, Faradaic current distribution there is edge effect, pole plate marginal portion current density is relatively large, mid portion is electric
Current density is relatively small.So, it will usually cause aluminium foil marginal portion pit density, mistake aluminum amount relatively large and pars intermedia
Divide pit density, mistake aluminum amount relatively small；Marginal portion capacitance is of a relatively high, mid portion capacitance is relatively low；Finally
As a result cause that aluminium foil capacitance dispersion ratio is high, consistent sexual deviation, affect product quality.Electrolytic etching process, aluminium foil is two pieces of poles
Longitudinal direction is advanced in the middle of plate, although have some to install flow distribution plate measure additional using such as pole plate two edges, but effect is undesirable, still cannot
Accomplish to be uniformly distributed Faradaic current, solve aluminium foil both sides and mid portion current density inequality, the uneven problem of corrosion.Using cambered surface
Rectangle graphite electrode plate is carried out non-equally（Both sides progressively reduce toward centre）The method of corrosion is in whole electric aluminum foil manufacturing industry
Do not have been reported that.
The content of the invention
The present invention provides a kind of medium-high voltage electronic aluminum foil corrosion method, can effectively solve presence in existing caustic solution
Electric current distribution is uneven, corrosion inequality, high capacitance dispersion ratio, consistent sexual deviation the problems such as, prepared colory corruption
Erosion paper tinsel.
Technical scheme is as follows：
A kind of medium-high voltage electronic aluminum foil corrosion method, including the premenstrual process of high-purity aluminum foil, electrolytic etching are provided（It is rotten including hair engaging aperture
Erosion and reaming corrosion）, post processing, drying etc. step；The method of the electrolytic etching is non-equally to corrode.The electrolytic etching
It is that the high-purity aluminum foil for passing through pre-treatment is placed on into the cambered surface rectangle graphite that two pieces of Parallel Curvature radiuses are 45～310cm
In the middle of pole plate, minimum range is 10～20cm between aluminium foil and pole plate, carries out hair engaging aperture and reaming corrosion.
The general plotting of the present invention：Caustic solution used is non-equally to corrode, specially by the premenstrual place of high-purity aluminum foil
After reason, being placed in the middle of two pieces of cambered surface rectangle graphite electrode plates carries out non-equally electrolytic etching hair engaging aperture and reaming, post-processes again, dries
It is dry, the etched foil for meeting certain specification requirement is obtained.
Further, to be placed in pre-treatment in phosphoric acid solution, taking-up is cleaned up for the pre-treatment.
Further, the electrolytic etching process is powered the rectangle graphite cake that pole plate is horizontal cambered surface, cambered surface radius of curvature
For 45～310cm.
Further, the distance between the aluminium foil and two pieces of graphite electrode plates be it is unequal, spacing from both sides toward it is middle by
Step reduces.
Further, the aluminium foil and two pieces of pole plate minimum ranges are 10～20cm.
Further, the post processing be placed in after electrolyte in dilute nitric acid solution to be cleaned up, and is then taken out and is cleaned up,
Drying.
Finally according to " People's Republic of China (PRC) electron trade standard SJ/T 11140-2012：Aluminium electrolutic capacitor electrode
Paper tinsel " carries out different voltage chemical conversions.
Beneficial effects of the present invention：
There is no edge effect in the 1st, " non-equally " forms of corrosion, Faradaic current distribution, it is to avoid pole plate marginal portion electric current is close
Spend the relatively large, problem that mid portion current density is relatively small；
2nd, not only avoid causing aluminium foil marginal portion pit density and mistake aluminum amount relatively large, and mid portion pit density and mistake
The relatively small problem of aluminum amount；Also avoid that marginal portion capacitance is of a relatively high, mid portion capacitance is relatively low asks
Topic；So as to avoid causing, aluminium foil capacitance dispersion ratio is high, consistent sexual deviation, affects the problem of product quality.
Specific embodiment
Below in conjunction with every explanation, the embodiment description present invention.
Technical scheme is as follows：
A kind of medium-high voltage electronic aluminum foil corrosion method, including the premenstrual process of high-purity aluminum foil, electrolytic etching are provided（It is rotten including hair engaging aperture
Erosion and reaming corrosion）, post processing, drying etc. step；The method of the electrolytic etching is non-equally to corrode.
The electrolytic etching is that the high-purity aluminum foil for passing through pre-treatment is placed on into two pieces of radius of curvature for 45～310cm
Horizontal cambered surface rectangle graphite electrode plate in the middle of.
The electrolytic etching process is powered the rectangle graphite cake that pole plate is horizontal cambered surface, and cambered surface radius of curvature is 45～
310cm 。
The distance between the aluminium foil and two pieces of graphite electrode plates are unequal, and spacing is progressively reduced from both sides toward centre.
The aluminium foil and two pieces of pole plate minimum ranges are 10～20cm.
To be placed in pre-treatment in phosphoric acid solution, taking-up is cleaned up for the pre-treatment.
The post processing be placed in after electrolyte in dilute nitric acid solution to be cleaned up, and is then taken out and is cleaned up, and is dried
Finally according to " People's Republic of China (PRC) electron trade standard SJ/T 11140-2012：Electrode foil for aluminum electrolytic capacitors "
Carry out different voltage chemical conversions.
Comparative example 1：
It is that 99.99%, cubic texture occupancy rate is placed in front place in phosphoric acid solution more than the aluminium foil of 95%, 125 μm of thickness by purity
Reason, taking-up is cleaned up；Then it is placed in the middle of two pieces of flat rectangular pole plates, being placed in hydrochloric acid and sulfuric acid mixed solution is carried out
" equidistant " electrolysis hair engaging aperture corrosion；Taking-up is cleaned up；Then it is placed in the middle of two pieces of flat rectangular pole plates, is placed in hydrochloric acid or nitre
" equidistant " electrolysis reaming corrosion is carried out in acid solution；Taking-up is cleaned up；Then it is placed in dilute nitric acid solution and is post-processed；
Taking-up is cleaned up, drying.Finally according to " People's Republic of China (PRC) electron trade standard SJ/T 11140-2012：Aluminium electroloysis electricity
Container is with electrode foil " carry out 600V chemical conversions；Aluminum amount, capacitance are lost in detection；Calculate and lose aluminum amount deviation, capacitance dispersion ratio.
Embodiment 1：
To be aluminium foil of the 99.99%, cubic texture occupancy rate more than 95%, 125 μm of thickness with the identical purity of comparative example 1, be placed in
With pre-treatment in the identical phosphoric acid solution of comparative example 1, taking-up cleans up；Then it is placed in the arc that two pieces of radius of curvature are 310cm
Minimum range is 20cm in the middle of the rectangle graphite electrode plate of face, between aluminium foil and cambered surface graphite electrode plate, is placed in and the identical salt of comparative example 1
" non-equally " electrolysis hair engaging aperture corrosion is carried out in acid and sulfuric acid mixed solution；Taking-up is cleaned up；Then two pieces of curvature half are placed in
Footpath for 310cm cambered surface rectangle graphite electrode plate in the middle of, between aluminium foil and cambered surface graphite electrode plate minimum range be 20cm, be placed in it is right
" non-equally " electrolysis reaming corrosion is carried out in the identical hydrochloric acid of ratio 1 or salpeter solution；Taking-up is cleaned up；Then be placed in
Post-processed in the identical dilute nitric acid solution of comparative example 1；Taking-up is cleaned up, drying.Finally according to " the People's Republic of China (PRC)
Electron trade standard SJ/T 11140-2012：Electrode foil for aluminum electrolytic capacitors " carries out 600V chemical conversions；Aluminum amount, electric capacity are lost in detection
Amount；Calculate and lose aluminum amount deviation, capacitance dispersion ratio.
Comparative example 2：
It is that 99.99%, cubic texture occupancy rate is placed in pre-treatment in phosphoric acid solution more than the aluminium foil of 95%, 120 μm of thickness by purity,
Taking-up is cleaned up；Then it is placed in the middle of two pieces of flat rectangular pole plates, being placed in hydrochloric acid and sulfuric acid mixed solution is carried out " equidistantly
From " electrolysis hair engaging aperture corrosion；Taking-up is cleaned up；Then it is placed in the middle of two pieces of flat rectangular pole plates, is placed in hydrochloric acid or nitric acid is molten
" equidistant " electrolysis reaming corrosion is carried out in liquid；Taking-up is cleaned up；Then it is placed in dilute nitric acid solution and is post-processed；Take out
Clean up, dry.Finally according to " People's Republic of China (PRC) electron trade standard SJ/T 11140-2012：Aluminium electrolutic capacitor
With electrode foil " carry out 520V chemical conversions；Aluminum amount, capacitance are lost in detection；Calculate and lose aluminum amount deviation, capacitance dispersion ratio.
Embodiment 2：
To be aluminium foil of the 99.99%, cubic texture occupancy rate more than 95%, 120 μm of thickness with the identical purity of comparative example 2, be placed in
With pre-treatment in the identical phosphoric acid solution of comparative example 2, taking-up cleans up；Then it is placed in the arc that two pieces of radius of curvature are 100cm
In the middle of the rectangle graphite electrode plate of face, between aluminium foil and cambered surface graphite electrode plate minimum range be 16cm, with the identical hydrochloric acid of comparative example 2
Corrode with " non-equally " electrolysis hair engaging aperture is carried out in sulfuric acid mixed solution；Taking-up is cleaned up；Then two pieces of radius of curvature are placed in
It is 16cm for minimum range in the middle of the cambered surface rectangle graphite electrode plate of 100cm, between aluminium foil and cambered surface graphite electrode plate, is placed in and contrast
" non-equally " electrolysis reaming corrosion is carried out in the identical hydrochloric acid of example 2 or salpeter solution；Taking-up is cleaned up；Then be placed in it is right
Post-processed in the identical dilute nitric acid solution of ratio 2；Taking-up is cleaned up, drying.Finally according to " People's Republic of China's electricity
Sub-industry standard SJ/T 11140-2012：Electrode foil for aluminum electrolytic capacitors " carries out 520V chemical conversions；Aluminum amount, electric capacity are lost in detection
Amount；Calculate and lose aluminum amount deviation, capacitance dispersion ratio.
Comparative example 3：
It is that 99.99%, cubic texture occupancy rate is placed in pre-treatment in phosphoric acid solution more than the aluminium foil of 95%, 80 μm of thickness by purity,
Taking-up is cleaned up；Then it is placed in the middle of two pieces of flat rectangular pole plates, being placed in hydrochloric acid and sulfuric acid mixed solution is carried out " equidistantly
From " electrolysis hair engaging aperture corrosion；Taking-up is cleaned up；Then it is placed in the middle of two pieces of flat rectangular pole plates, is placed in hydrochloric acid or nitric acid is molten
" equidistant " electrolysis reaming corrosion is carried out in liquid；Taking-up is cleaned up；Then it is placed in dilute nitric acid solution and is post-processed；Take out
Clean up, dry.Finally according to " People's Republic of China (PRC) electron trade standard SJ/T 11140-2012：Aluminium electrolutic capacitor
With electrode foil " carry out 375V chemical conversions；Aluminum amount, capacitance are lost in detection；Calculate and lose aluminum amount deviation, capacitance dispersion ratio.
Embodiment 3：
To be aluminium foil of the 99.99%, cubic texture occupancy rate more than 95%, 80 μm of thickness with the identical purity of comparative example 3, be placed in
With pre-treatment in the identical phosphoric acid solution of comparative example 3, taking-up cleans up；Then it is placed in the cambered surface that two pieces of radius of curvature are 55cm
Minimum range is 10cm in the middle of rectangle graphite electrode plate, between aluminium foil and cambered surface graphite electrode plate, is placed in and the identical hydrochloric acid of comparative example 3
Corrode with " non-equally " electrolysis hair engaging aperture is carried out in sulfuric acid mixed solution；Taking-up is cleaned up；Then two pieces of radius of curvature are placed in
It is 10cm for minimum range in the middle of the cambered surface rectangle graphite electrode plate of 55cm, between aluminium foil and cambered surface graphite electrode plate, is placed in and contrast
" non-equally " electrolysis reaming corrosion is carried out in the identical hydrochloric acid of example 3 or salpeter solution；Taking-up is cleaned up；Then be placed in it is right
Post-processed in the identical dilute nitric acid solution of ratio 3；Taking-up is cleaned up, drying.Finally according to " People's Republic of China's electricity
Sub-industry standard SJ/T 11140-2012：Electrode foil for aluminum electrolytic capacitors " carries out 375V chemical conversions；Aluminum amount, electric capacity are lost in detection
Amount；Calculate and lose aluminum amount deviation, capacitance dispersion ratio.
Comparative example and using caustic solution of the present invention obtain aluminium foil mistake aluminum amount, mistake aluminum amount deviation, capacitance, capacitance from
Scattered rate data：
Data Comparison can be seen that from table can be greatly reduced aluminium using caustic solution of the present invention with euqalizing current Density Distribution
Aluminum amount deviation and capacitance dispersion ratio are lost in paper tinsel corrosion, make aluminium foil capacitance uniformity more preferable.
It is pointed out that above-described embodiment technology design only to illustrate the invention and feature, its object is to allow ripe
The personage for knowing technique will appreciate that present disclosure and implements according to this, can not limit the protection model of the present invention with this
Enclose.All equivalence changes made according to spirit of the invention or modification, all should be included within the scope of the present invention.
Claims (7)
1. a kind of medium-high voltage electronic aluminum foil corrosion method, it is characterised in that：Including the premenstrual process of high-purity aluminum foil, electrolytic etching（Bag
Include hair engaging aperture corrosion and reaming corrosion）, post processing, drying etc. step；The method of the electrolytic etching is non-equally to corrode；It is described
Electrolytic etching is that the high-purity aluminum foil for passing through pre-treatment is placed on into the transverse arc that two pieces of Parallel Curvature radiuses are 45～310cm
In the middle of the rectangle graphite electrode plate of face, hair engaging aperture and reaming corrosion are carried out.
2. medium-high voltage electronic aluminum foil corrosion method according to claim 1, it is characterised in that：The electrolytic etching process
Power supply pole plate is horizontal cambered surface rectangle graphite cake.
3. medium-high voltage electronic aluminum foil corrosion method according to claim 1 and 2, it is characterised in that：The graphite electrode plate arc
Curvature radius are 45～310cm.
4. the medium-high voltage electronic aluminum foil corrosion method according to claim 1 or 2 or 3, it is characterised in that：The electrolytic etching
The distance between process aluminium foil and two pieces of graphite electrode plates are unequal, and spacing is progressively reduced from both sides toward centre.
5. medium-high voltage electronic aluminum foil corrosion method according to claim 4, it is characterised in that：The aluminium foil is minimum with pole plate
Distance is 10～20cm.
6. medium-high voltage electronic aluminum foil corrosion method according to claim 1, it is characterised in that：The pre-treatment is to be placed in phosphorus
Pre-treatment in acid solution, taking-up is cleaned up.
7. medium-high voltage electronic aluminum foil corrosion method according to claim 1, it is characterised in that：The post processing is dry for cleaning
It is placed in dilute nitric acid solution after net electrolyte, then takes out and clean up, dries.
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| CN201611148177.1A CN106637380A (en) | 2016-12-13 | 2016-12-13 | Middle and high voltage electronic aluminium foil corrosion method |
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| CN201611148177.1A CN106637380A (en) | 2016-12-13 | 2016-12-13 | Middle and high voltage electronic aluminium foil corrosion method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488871A (en) * | 2017-08-16 | 2017-12-19 | 乳源瑶族自治县东阳光化成箔有限公司 | The hair engaging aperture caustic solution of aluminium foil and the manufacture method of etched foil |
| CN108456916A (en) * | 2017-12-29 | 2018-08-28 | 广西贺州市桂东电子科技有限责任公司 | A kind of caustic solution of mesohigh electric aluminum foil |
| CN112853457A (en) * | 2021-01-22 | 2021-05-28 | 广西贺州市桂东电子科技有限责任公司 | Corrosion hole-forming device for high-voltage aluminum electrolysis electronic aluminum foil |
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| CN203096223U (en) * | 2013-03-02 | 2013-07-31 | 区晓帆 | Graphite electrode plate for aluminium foil corrosion |
| CN203096224U (en) * | 2013-03-02 | 2013-07-31 | 区晓帆 | Graphite electrode plate for aluminium foil corrosion |
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| CN203096223U (en) * | 2013-03-02 | 2013-07-31 | 区晓帆 | Graphite electrode plate for aluminium foil corrosion |
| CN203096224U (en) * | 2013-03-02 | 2013-07-31 | 区晓帆 | Graphite electrode plate for aluminium foil corrosion |
| CN205508637U (en) * | 2015-02-10 | 2016-08-24 | 东莞东阳光科研发有限公司 | Graphite polar plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488871A (en) * | 2017-08-16 | 2017-12-19 | 乳源瑶族自治县东阳光化成箔有限公司 | The hair engaging aperture caustic solution of aluminium foil and the manufacture method of etched foil |
| CN107488871B (en) * | 2017-08-16 | 2018-12-25 | 乳源瑶族自治县东阳光化成箔有限公司 | The hair engaging aperture caustic solution of aluminium foil and the manufacturing method of etched foil |
| CN108456916A (en) * | 2017-12-29 | 2018-08-28 | 广西贺州市桂东电子科技有限责任公司 | A kind of caustic solution of mesohigh electric aluminum foil |
| CN112853457A (en) * | 2021-01-22 | 2021-05-28 | 广西贺州市桂东电子科技有限责任公司 | Corrosion hole-forming device for high-voltage aluminum electrolysis electronic aluminum foil |
| CN112853457B (en) * | 2021-01-22 | 2024-05-14 | 广西贺州市桂东电子科技有限责任公司 | Corrosion hole forming device for high-voltage aluminum electrolysis electronic aluminum foil |
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Application publication date: 20170510 |