CN103578766A - Turning speed improving process during corrosion for electronic plain foil - Google Patents
Turning speed improving process during corrosion for electronic plain foil Download PDFInfo
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- CN103578766A CN103578766A CN201310309636.XA CN201310309636A CN103578766A CN 103578766 A CN103578766 A CN 103578766A CN 201310309636 A CN201310309636 A CN 201310309636A CN 103578766 A CN103578766 A CN 103578766A
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- Prior art keywords
- corrosion
- paper tinsel
- hole
- acid concentration
- light paper
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Links
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000005260 corrosion Methods 0.000 title claims abstract description 54
- 230000007797 corrosion Effects 0.000 title claims abstract description 54
- 239000011888 foil Substances 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 239000003792 electrolyte Substances 0.000 claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims description 69
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 18
- 239000004411 aluminium Substances 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 230000035484 reaction time Effects 0.000 description 23
- 239000002075 main ingredient Substances 0.000 description 20
- 239000000243 solution Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910002804 graphite Inorganic materials 0.000 description 10
- 239000010439 graphite Substances 0.000 description 10
- 239000007791 liquid phase Substances 0.000 description 10
- 239000000758 substrate Substances 0.000 description 10
- FZUJWWOKDIGOKH-UHFFFAOYSA-N sulfuric acid hydrochloride Chemical compound Cl.OS(O)(=O)=O FZUJWWOKDIGOKH-UHFFFAOYSA-N 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 10
- 238000005452 bending Methods 0.000 description 7
- 238000002203 pretreatment Methods 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention relates to a turning speed improving process during corrosion for an electronic plain foil used for an aluminum electrolytic capacitor. On the existing process basis of an electronic plain foil sulfuric acid and hydrochloric acid corrosion system, hole forming which is carried out once becomes hole forming which is carried out twice in the corrosion process, original constant-current powering-up is changed to a linear gradient powering-up mode from a higher value to a lower value, the content of corrosion electrolyte is properly adjusted, and the problem that the turning speed is difficult to improve due to the facts that in the prior art, hole forming currents cannot be interrupted and due to largest bearing currents of the foil can be completely solved. According to the turning speed improving process, the production turning speed of an existing process is improved by 30-50%, and compared with the specific volume of a corrosion foil in the prior art, the specific volume of a produced corrosion foil is improved.
Description
Technical field
The present invention relates to a kind of etching process, be applied to mesohigh etched foil production field for aluminium electrolytic capacitor.
Background technology
Aluminium electrolytic capacitor is the electronics proprietary material of electronics and information industry basic device series products with electronic light paper tinsel.According to the prediction of Power capacitor industry association, along with the development of the industries such as electronics, electric power, communication, household electrical appliance, energy-saving industrial equipment, information terminal apparatus and electronic equipment will increase rapidly to the demand of large capacity, high performance mesohigh electrolytic capacitor.For a long time, supply falls short of demand in medium-to-high grade time medium-high voltage aluminum electrolytic capacitor electronic light paper tinsel market.The fewer companies such as Japanese, German, Italian has represented the state-of-the-art technology of this product in the world, and product market share is also greater than 70%.Therefore improve the technical merit of electronic light paper tinsel for mesohigh electrolytic capacitor, significant to the technological progress of national scientific development and enterprise.
The corrosion of light paper tinsel is the preceding working procedure that electronic light paper tinsel is manufactured, and the specific volume after the corrosion of light paper tinsel is the basic and crucial of electronic light paper tinsel specific volume.During current electronic light paper tinsel is at home produced, the technological process of production of etched foil is generally divided into: 5 steps such as pre-treatment, a pitting corrosion, reaming burn into chemical washing, oven dry, the effect of each step is all not identical.Wherein, the Main Function of sending out pitting corrosion is to make light paper tinsel surface through pre-treatment form evenly intensive, the pore with certain depth and size, and these pores after second reaming corrosion, can significantly improve the specific area (specific volume) of aluminium foil again.It is a most important ring in whole corrosion process that light paper tinsel is sent out hole, and the height of etched foil quality is played to conclusive effect, but existing technological requirement sends out hole electric current and can not interrupt, otherwise the etched foil specific volume of producing will significantly reduce.Under the same terms, improve the speed of a motor vehicle, just shortened a hole time, increase that to send out a hole electric current be to guarantee to send out the constant sole mode of hole electric weight, but electric current just can cause because of heating the problem of the disconnected paper tinsel of light paper tinsel sparking after increasing to a certain degree.Therefore, existing technique is sent out the raising that current continuity in the process of hole requires and light paper tinsel can bear maximum current has greatly restricted the etched foil production speed of a motor vehicle, and production efficiency is restricted.
Summary of the invention
The object of the invention is to: provide a kind of technique for solving the limited problem of the current etched foil production speed of a motor vehicle, by the realization of this technique, can make the etched foil production speed of a motor vehicle improve 30%-50% on existing technique basis.
Select the electronic light paper tinsel of producing etched foil special use, required thickness is in 110-120 μ m, and the purity of aluminium foil is more than 99.99%.
Aluminium electrolytic capacitor of the present invention is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, take traditional handicraft as basis, it is characterized in that: at twice electronic light paper tinsel is sent out to hole, between twice hole, process does not apply electric current, send out hole slot independent separately, the electric current in twice hole all adopts in time linear gradient from high to low to power up mode.
Take traditional handicraft as basis, working concentration of the present invention is that NaOH solution, KOH solution or its mixed liquor of 20g/L carries out pre-treatment to the electronic light paper tinsel of selecting, so that light paper tinsel can be sent out hole smoothly, if light paper tinsel surface film oxide is thicker, can suitably by heating up, extend the reaction time, solve (reaction time can realize by adjusting the liquid level of tank liquor).
Take traditional handicraft as basis, by sending out hole slot, be increased to two from original one, the negative electrode of each groove is by the mode of shielding, and (top current density is 0.7-1.3A/cm to make the maximum linear of current density when entering groove change to the minimum of bottom
2, base current density is 0.1A/cm
2), one-level is sent out aperture and is crossed and enter immediately secondary after simple washing and send out hole slot and again send out hole.It is 3:2 that one secondary is sent out hole electric weight distribution ratio, and the total electric weight applying in twice hole process is suitable with existing technique, and light paper tinsel time of staying in single hole slot shortens, thereby makes the speed of a motor vehicle be promoted to 2.1-2.4m/min by original 1.6-1.7m/min.
Etched foil through twice hole need to be at HNO
3in solution, carry out reaming, the current density of reaming is 0.1-0.18A/cm
2, pore-enlargement is 450-550 second, because the speed of a motor vehicle promotes, light paper tinsel, through single groove time shorten, can be controlled by increasing reaming groove the reaction time of reaming.
Etched foil after reaming completes is at HNO
3in solution, soak 40 seconds, then use washed with de-ionized water 4-5 time, dry.
According to the present invention, the pretreatment liquid temperature of electronic light paper tinsel is 40 ° of C, and the processing time is 40 seconds.
According to the present invention, the pretreatment liquid of electronic light paper tinsel is NaOH solution, KOH solution or its mixed liquor.
Some of them embodiment, the pretreatment liquid of electronic light paper tinsel is that concentration is the NaOH solution of 20g/L, and temperature is 40 ° of C, and the processing time is 40 seconds.
According to the present invention, sending out the electrolyte free acid concentration of using in hole is 6.0-8.0mol/L, and total acid concentration is 7.0-9.0mol/L, Cl
-concentration is 0.65-0.95mol/L.
Total acid concentration of the present invention refers to anion concentration.
According to the present invention, the electrolyte that a hole is used is by HCl, H
2sO
4, Al
3+form.
Some of them embodiment, the electrolyte that a hole is used is by HCl, H
2sO
4, Al
3+form, free acid concentration is 6.5-7.5mol/L, and total acid concentration is 7.5-8.5mol/L, Cl
-concentration is 0.75-0.85mol/L.
According to the present invention, sending out the electrolyte temperature of using in hole is 70-73 ° of C, and the initial current density of linear change is 0.7-1.3A/cm
2, when linear change finishes, current density is 0-0.1A/cm
2, it is 35-45 second that single is sent out the hole time.
According to the present invention, the electrolyte free acid concentration of reaming groove is 0.2-0.6mol/L, and total acid concentration is 0.8-1.2mol/L, and temperature is 69-72 ° of C, and current density is 0.15A/cm
2, pore-enlargement is 450-600 second.
According to the present invention, the electrolyte of reaming groove is by HNO
3, Al
3+form.
Some of them embodiment, the electrolyte of reaming groove is by HNO
3, Al
3+form, free acid concentration is 0.4-0.6mol/L, and total acid concentration is 0.8-1.2mol/L, and temperature is 69-72 ° of C, and current density is 0.15A/cm
2, pore-enlargement is 450-550 second.
On the other hand, the invention provides a kind of aluminium electrolytic capacitor and put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, it is characterized in that: at twice electronic light paper tinsel is sent out to hole, between twice hole, process does not apply electric current, send out hole slot independent separately, the electric current in twice hole all adopts in time linear gradient from high to low to power up mode; In 40 ° of C NaOH solution that are first 20g/L in concentration before light paper tinsel is used, process 40 seconds, the electrolyte that a hole is used is by HCl, H
2sO
4, Al
3+form, free acid concentration is 7.05mol/L, and total acid concentration is 7.85mol/L, and Cl-concentration is 0.81mol/L, and electrolyte temperature is 71 ° of C, and one-level is sent out hole current density by 1A/cm
240 seconds internal linear, change to 0.1A/cm
2, secondary is sent out hole current density by 0.741A/cm
240 seconds internal linear, change to 0.1A/cm
2; The electrolyte of reaming groove is by HNO
3, Al
3+form, free acid concentration is 0.5mol/L, and total acid concentration is 1.0mol/L, and temperature is 71 ° of C, and current density is 0.15A/cm
2, pore-enlargement is 510 seconds.
The invention has the advantages that: by secondary, send out hole combination gradual change from big to small and power up mode, thoroughly solved and improved the contradiction that the speed of a motor vehicle has just reduced specific volume.Realization of the present invention in the situation that of not sacrificial etched paper tinsel specific volume, can improve 30%-50% by the production speed of a motor vehicle on existing technique basis.
Embodiment
The following stated be the preferred embodiment of the present invention, the present invention protects is not limited to following preferred implementation.It should be pointed out that on the basis of conceiving in these innovation and creation for a person skilled in the art, some distortion and the improvement made, all belong to protection of the present invention.
Current existing technique: send out hole slot liquid composition by HCl, H
2sO
4, Al
3+form (free acid concentration 7.05mol/L, total acid concentration 7.7mol/L, Cl
-concentration 0.7mol/L), 71 ° of C of reaction temperature, current density 0.72A/cm
2, reaming tank liquor composition is by HNO
3and Al
3+form (free acid concentration 0.3mol/L, total acid concentration 0.5mol/L), 71 ° of C of reaction temperature, current density 0.15A/cm
2.The speed of a motor vehicle is adjusted to 1.7m/min, and it is 52 seconds and 510 seconds that a hole, pore-enlargement are controlled.After reaming completes, by etched foil at HNO
3in solution, soak 1 minute, use washed with de-ionized water 5 times, dry.The project detecting comprises the attenuate amount measured in light paper tinsel corrosion process, measure bending times, the sample of etched foil (wide 1cm) under 1.0 bending curvature change into after (changing into tank liquor is 100g/L BAS, formation voltage 520V) specific volume, arrive voltage.
Embodiment 1
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.05mol/L wherein, total acid concentration 7.85mol/L, Cl
-concentration 0.81mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.4mol/L, total acid concentration 0.8mol/L), temperature is 72 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 550 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 2
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.5mol/L wherein, total acid concentration 8.5mol/L, Cl-concentration 0.85mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.6mol/L, total acid concentration 1.2mol/L), temperature is 69 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 550 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 3
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.5mol/L wherein, total acid concentration 8.5mol/L, Cl
-concentration 0.85mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, reduces to send out hole slot quantity the reaming reaction time is controlled is 450 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 4
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 6.5mol/L wherein, total acid concentration 7.5mol/L, Cl
-concentration 0.75mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 5
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.5mol/L wherein, total acid concentration 8.5mol/L, Cl
-concentration 0.85mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 6
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.05mol/L wherein, total acid concentration 7.85mol/L, Cl
-concentration 0.81mol/L), it is all 70 ° of C that a secondary is sent out hole slot liquid temp, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 7
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.05mol/L wherein, total acid concentration 7.85mol/L, Cl
-concentration 0.81mol/L), it is all 73 ° of C that a secondary is sent out hole slot liquid temp, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 8
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.05mol/L wherein, total acid concentration 7.85mol/L, Cl
-concentration 0.81mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.7A/cm
2and 0.4A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.3A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.7A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 40 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 9
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.05mol/L wherein, total acid concentration 7.85mol/L, Cl
-concentration 0.81mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 35 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 10
Select same batch of light paper tinsel of the normal operation of sulfuric acid-hcl corrosion system, the NaOH solution that is first 20g/L by concentration before corrosion soaks 40 seconds, and treatment temperature is 40 ° of C.One secondary is sent out hole slot liquid phase with (Main Ingredients and Appearance is HCl, H
2sO
4and Al
3+, free acid concentration 7.05mol/L wherein, total acid concentration 7.85mol/L, Cl-concentration 0.81mol/L), a secondary is sent out hole slot liquid temp and is respectively 71 ° of C and 72.5 ° of C, and average current density is respectively 0.55A/cm
2and 0.42A/cm
2(with being with pertusate tetrafluoroethene thin slice by negative electrode graphite substrate partly shielding effect, make current density by initial 1.0A/cm
2linear gradient is to 0.1A/cm
2, secondary is sent out hole current density by initial 0.74A/cm
2linear gradient is to 0.1A/cm
2).Reaming tank liquor Main Ingredients and Appearance is HNO
3and Al
3+(free acid concentration 0.5mol/L, total acid concentration 1.0mol/L), temperature is 71 ° of C, current density is 0.15A/cm
2.The speed of a motor vehicle is adjusted to 2.25m/s, and making a secondary send out that the hole reaction time all controls is 45 seconds, and the control of reaming reaction time is 510 seconds.Treatment process after reaming and test item are identical with existing technique.
Embodiment 11
We execute to above experiment 6 batches of products that obtain in example and have carried out following detection, and the project of detection comprises specific volume, the arrival voltage after attenuate amount, bending times, the etched foil measured in light paper tinsel corrosion process change into.
Corrosion thinning is measured: with pachometer, uncorroded, with batch 5 local detect thickness of difference of light paper tinsel, average, then measure corrosion thickness later with same method, two thickness differences are corrosion thinning amount.
Etched foil bending times requirement for experiment condition: will be of a size of the etched foil sample of 150mm * 10mm, and be clamped in bending (6 times/s) repeatedly in special-purpose crooked experimental machine, knee radius of curvature is R=1.0 ± 0.1mm; Loading: 2.5 ± 0.5N; Angle of bend: 90 °; Upper lower chuck spacing is 90 ± 2mm.
Specific volume: adopt static capacity tester to measure, sample is 50mm * 10mm etched foil of (determine under condition grow oxide-film) for changing into, the measured value in definite electrolyte solution and under definite voltage.
Arrive voltage: 50 * 10mm etched foil of (determine under condition grow oxide-film) is done positive pole in order changing into by sample, by filling, determine that the stainless steel tank of electrolyte solution does negative pole, obtain within a certain period of time the needed maximum voltage value of certain Faradaic current.
Table 1: experimental result
| Sample | 520Cap | Vef | 600Cap | Vef | Bending/returning | Attenuate/um |
| Existing technique | 0.751 | 525.0 | 0.582 | 605.4 | 52 | 6 |
| Embodiment 1 | 0.776 | 528.9 | 0.594 | 605.8 | 63 | 7 |
| Embodiment 2 | 0.768 | 531.6 | 0.588 | 605.8 | 63 | 7 |
| Embodiment 3 | 0.742 | 534.5 | 0.540 | 620.8 | 70 | 6 |
| Embodiment 4 | 0.741 | 532.1 | 0.553 | 609.8 | 70 | 6 |
| Embodiment 5 | 0.756 | 530.2 | 0.592 | 615.7 | 70 | 7 |
| Embodiment 6 | 0.805 | 529.1 | 0.598 | 608.3 | 49 | 7 |
| Embodiment 7 | 0.725 | 535.1 | 0.535 | 613.5 | 83 | 6 |
| Embodiment 8 | 0.765 | 529.0 | 0.580 | 607.4 | 55 | 7 |
| Embodiment 9 | 0.772 | 528.3 | 0.581 | 605.3 | 69 | 6 |
| Embodiment 10 | 0.810 | 529.3 | 0.605 | 603.4 | 48 | 8 |
Data in table 1 demonstrate the improvement of putting forward speed of a motor vehicle technique by this electronic light paper tinsel corrosion fully, and above 6 batches of products that we obtain, compared to existing technique, have speed of production fast, the feature that etched foil color and luster evenly, bending intensity is large and specific volume shoots straight.
Claims (12)
1. an aluminium electrolytic capacitor is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, it is characterized in that: at twice electronic light paper tinsel is sent out to hole, between twice hole, process does not apply electric current, sends out hole slot independent separately, and the electric current in twice hole all adopts in time linear gradient from high to low to power up mode.
2. aluminium electrolytic capacitor according to claim 1 is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, it is characterized in that: the pretreatment liquid temperature of electronic light paper tinsel is 40 ° of C, and the processing time is 40 seconds.
3. aluminium electrolytic capacitor according to claim 1 and 2 is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, it is characterized in that: the pretreatment liquid of described electronic light paper tinsel is NaOH solution, KOH solution or its mixed liquor.
4. aluminium electrolytic capacitor according to claim 1 and 2 is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, it is characterized in that: the pretreatment liquid of electronic light paper tinsel is that concentration is the NaOH solution of 20g/L, and temperature is 40 ° of C, and the processing time is 40 seconds.
5. speed of a motor vehicle technique is put forward in electrode foil for aluminum electrolytic capacitors corrosion according to claim 1, it is characterized in that: sending out the electrolyte free acid concentration of using in hole is 6.0-8.0mol/L, and total acid concentration is 7.0-9.0mol/L, Cl
-concentration is 0.65-0.95mol/L.
6. aluminium electrolytic capacitor is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel according to claim 1 or 5, it is characterized in that: the electrolyte that a hole is used is by HCl, H
2sO
4, Al
3+form.
7. aluminium electrolytic capacitor is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel according to claim 1 or 5, it is characterized in that: the electrolyte that a hole is used is by HCl, H
2sO
4, Al
3+form, free acid concentration is 6.5-7.5mol/L, and total acid concentration is 7.5-8.5mol/L, Cl
-concentration is 0.75-0.85mol/L.
8. aluminium electrolytic capacitor according to claim 1 is put forward speed of a motor vehicle technique with the corrosion of electronic light paper tinsel, it is characterized in that: sending out the electrolyte temperature of using in hole is 70-73 ° of C, and the initial current density of linear change is 0.7-1.3A/cm
2, when linear change finishes, current density is 0.1A/cm
2, it is 40 seconds that single is sent out the hole time.
9. speed of a motor vehicle technique is put forward in electrode foil for aluminum electrolytic capacitors corrosion according to claim 1, it is characterized in that: the electrolyte free acid concentration of reaming groove is 0.2-0.6mol/L, total acid concentration is 0.8-1.2mol/L, and temperature is 69-72 ° of C, and current density is 0.1-0.18A/cm
2, pore-enlargement is 450-600 second.
10. according to the aluminium electrolytic capacitor described in claim 1 or 9, with the corrosion of electronic light paper tinsel, put forward speed of a motor vehicle technique, it is characterized in that: the electrolyte of reaming groove is by HNO
3, Al
3+form.
11. put forward speed of a motor vehicle technique according to the aluminium electrolytic capacitor described in claim 1 or 9 with the corrosion of electronic light paper tinsel, it is characterized in that: the electrolyte of reaming groove is by HNO
3, Al
3+form, free acid concentration is 0.4-0.6mol/L, and total acid concentration is 0.8-1.2mol/L, and temperature is 69-72 ° of C, and current density is 0.15A/cm
2, pore-enlargement is 450-550 second.
12. put forward speed of a motor vehicle technique according to aluminium electrolytic capacitor claimed in claim 1 with the corrosion of electronic light paper tinsel, it is characterized in that: at twice electronic light paper tinsel is sent out to hole, between twice hole, process does not apply electric current, send out hole slot independent separately, the electric current in twice hole all adopts in time linear gradient from high to low to power up mode; In 40 ° of C NaOH solution that are first 20g/L in concentration before light paper tinsel is used, process 40 seconds, the electrolyte that a hole is used is by HCl, H
2sO
4, Al
3+form, free acid concentration is 7.05mol/L, and total acid concentration is 7.85mol/L, Cl
-concentration is 0.81mol/L, and electrolyte temperature is 71 ° of C, and one-level is sent out hole current density by 1A/cm
240 seconds internal linear, change to 0.1A/cm
2, secondary is sent out hole current density by 0.741A/cm
240 seconds internal linear, change to 0.1A/cm
2; The electrolyte of reaming groove is by HNO
3, Al
3+form, free acid concentration is 0.5mol/L, and total acid concentration is 1.0mol/L, and temperature is 71 ° of C, and current density is 0.15A/cm
2, pore-enlargement is 510 seconds.
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| CN105355435A (en) * | 2015-12-11 | 2016-02-24 | 南通海星电子股份有限公司 | Current shield plate and method for manufacturing electrode foil therethrough |
| 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 |
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| 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 |
| 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 |
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