CN110783108A - Method for manufacturing corrosion foil - Google Patents
Method for manufacturing corrosion foil Download PDFInfo
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- CN110783108A CN110783108A CN201910992622.XA CN201910992622A CN110783108A CN 110783108 A CN110783108 A CN 110783108A CN 201910992622 A CN201910992622 A CN 201910992622A CN 110783108 A CN110783108 A CN 110783108A
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- corrosion
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- 238000005260 corrosion Methods 0.000 title claims abstract description 144
- 230000007797 corrosion Effects 0.000 title claims abstract description 144
- 239000011888 foil Substances 0.000 title claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 60
- 239000000243 solution Substances 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 43
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 3
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 238000005507 spraying Methods 0.000 claims description 24
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 15
- 229910017604 nitric acid Inorganic materials 0.000 claims description 15
- 239000011148 porous material Substances 0.000 claims description 13
- 239000008139 complexing agent Substances 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 238000005530 etching Methods 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims 2
- 238000000137 annealing Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 4
- 238000010924 continuous production Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 6
- 229940092714 benzenesulfonic acid Drugs 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- -1 sulfonic acid compound Chemical class 0.000 description 3
- 125000000542 sulfonic acid group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229920006389 polyphenyl polymer Polymers 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003503 early effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/055—Etched foil electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a method for manufacturing a corrosion foil, which comprises five steps of pretreatment, primary hole forming corrosion, secondary hole forming corrosion, reaming corrosion and post-treatment of a high-purity aluminum foil. The pretreatment comprises the following steps: soaking the aluminum foil in the pretreatment liquid for 60-70 s; cleaning, placing in a primary corrosion mixed solution at 70-85 deg.C, and applying current at 1800mA/cm
2The direct current is used for electrolytic corrosion for 65-75s, the alloy is cleaned by pure water and is placed into a hydrochloric acid solution containing 10-12% at the temperature of 60-90 ℃, and the chemical corrosion is carried out for 300-400 s; finally, cleaning with pure water and then drying in an oven with the temperature of 100-150 ℃; the pretreatment process is simple and convenient to operate. The processing steps of twice holing corrosion are adjusted, so that the holing effect is uniform, the dispersion rate of corrosion foil for the aluminum electrolytic capacitor is greatly reduced, and the bending is improvedAnd (4) performance. The post-treatment processing step is improved so that it is not necessary to perform annealing treatment, and continuous production of the etched foil can be realized.
Description
Technical Field
The invention relates to the technical field of production of corrosion foil, in particular to a manufacturing method of corrosion foil.
Background
The prior art discloses a manufacturing process of a medium corrosion foil, which comprises five steps of pretreatment, primary hole forming corrosion, secondary hole forming corrosion, hole expanding corrosion and post-treatment of a high-purity aluminum foil, wherein the pretreatment is to soak an aluminum polished foil in a pretreatment liquid for 40-50 s; cleaning, placing in a first etching mixed solution at 80-90 deg.C, cleaning with pure water, placing in a nitric acid bath solution containing 2% at 70-80 deg.C, and etching with current density of 0.15
2Performing electrolytic corrosion for 500-600s by direct current; the post-treatment adopts two-stage annealing heat treatment at different temperatures, the pre-treatment process is simple, the operation is convenient, the deformation condition is avoided, the annealing process is improved in the post-treatment, and the manufacturing method of the corrosion foil adopts two-stage annealing heat treatment at different temperatures, so that the bending performance of the corrosion foil for the aluminum electrolytic capacitor is greatly improved. But the annealing heat treatment process is complex, the automatic industrial production cannot be realized, and the practicability is not realized.
Disclosure of Invention
The present invention is directed to a method for making etched foil, which solves one or more of the problems of the prior art and provides at least one useful alternative or creation.
The technical scheme adopted for solving the technical problems is as follows:
a method for manufacturing a corrosion foil comprises five steps of pretreatment, primary pore-forming corrosion, secondary pore-forming corrosion, reaming corrosion and post-treatment of a high-purity aluminum foil. The method specifically comprises the following steps:
pretreatment: soaking the aluminum foil in the pretreatment liquid for 60-70 s; cleaning, placing in a primary corrosion mixed solution at 70-85 deg.C, and applying current at 1800mA/cm
2The direct current is used for electrolytic corrosion for 65-75s, the alloy is cleaned by pure water and is placed into a hydrochloric acid solution containing 10-12% at the temperature of 60-90 ℃, and the chemical corrosion is carried out for 300-400 s; finally, cleaning with pure water and then drying in an oven with the temperature of 100-150 ℃;
primary pitting corrosion: placing the pretreated aluminum foil in a first-stage pore-forming corrosive liquid at the temperature of 70-85 ℃, and applying a current with the density of 1500-2100mA/cm
2Performing primary pore-forming corrosion for 65-75s by direct current, wherein the primary pore-forming corrosion solution is a mixed solution containing 1-3% of hydrochloric acid and 6-10% of sulfuric acid in percentage by mass;
secondary pitting corrosion: placing the aluminum foil corroded by the primary hole in a secondary hole corrosion solution at the temperature of 80-85 ℃, and applying a current with the density of 300-400mA/cm
2Performing power hole corrosion for 200 and 300 seconds by direct current;
reaming and corroding: placing the aluminum foil subjected to the secondary pore forming corrosion in a pore-expanding corrosion solution at the temperature of 60-90 ℃ for chemical pore-expanding corrosion for 300-400 seconds;
and (3) post-treatment: and soaking the aluminum foil subjected to pore-expanding corrosion in a nitric acid solution at the temperature of 50-80 ℃.
Wherein, the first-stage pore etching solution in the first-stage pore etching step contains a complexing agent, specifically, the complexing agent can be selected from polyphenyl sulfonic acid or sodium polyphenyl sulfonate, and the molecular weight is 50000. When the aluminum foil finishes the primary perforation corrosion, the aluminum foil is taken out from the corrosion liquid tank and then is subjected to liquid spraying by using a primary perforation corrosion solution, and the spraying flow rate is 18L/h.
Preferably, the secondary pore-forming corrosion liquid is a solution of nitric acid with the mass percentage of 0.5-1%. And when the aluminum foil finishes the secondary pore-forming corrosion, taking out the aluminum foil from the corrosion liquid tank, and then carrying out liquid spraying on the aluminum foil by using a secondary pore-forming corrosion solution, wherein the spraying flow rate is 18L/h.
Preferably, the reaming corrosive liquid is 10-12% by mass of hydrochloric acid solution.
Preferably, the nitric acid solution used for the post-treatment is a solution of 2% by mass of nitric acid.
Compared with the prior art, the invention has the beneficial effects that:
the pretreatment process is simple and convenient to operate. The treatment steps of twice holing corrosion are adjusted, so that the holing effect is uniform, the dispersion rate of the corrosion foil for the aluminum electrolytic capacitor is greatly reduced, and the bending performance is improved. The post-treatment processing step is improved so that it is not necessary to perform annealing treatment, and continuous production of the etched foil can be realized.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the corrosion foil comprises five steps of pretreatment, primary holing corrosion, secondary holing corrosion, reaming corrosion and post-treatment of a high-purity aluminum foil, wherein the pretreatment is to put an aluminum foil into pretreatment liquid to be soaked for 60 s; cleaning, placing in a primary corrosion mixed solution at 70 deg.C, and applying current at density of 1500mA/cm
2Carrying out electrolytic corrosion for 65s by direct current, cleaning by pure water, putting into a hydrochloric acid solution containing 10% at the temperature of 60 ℃, and carrying out chemical corrosion for 300 s; and finally, cleaning with pure water, and drying in an oven at 100 ℃.
Wherein, the first-stage pore generation corrosion is to place the pre-treated aluminum foil in a first-stage pore generation corrosion solution at the temperature of 70 ℃ and apply the current density of 1500mA/cm
2The direct current of (2) is used for carrying out the pore-forming corrosion for 65s, and the primary pore-forming corrosion solution is a mixed solution containing 1% of hydrochloric acid and 6% of sulfuric acid in percentage by mass. When the aluminum foil finishes the first-level pore corrosion, the aluminum foil is taken out from the corrosion liquid tank and dissolved in the first-level pore corrosion solutionLiquid spraying is carried out on the spray pipe, and the spraying flow rate is 18L/h.
The secondary pore-forming corrosion is to put the aluminum foil after the primary pore-forming corrosion in a secondary pore-forming corrosion solution at the temperature of 80 ℃ and apply a current with the density of 300mA/cm
2The direct current of the secondary pore-forming etching solution is used for pore-forming etching for 200s, and the secondary pore-forming etching solution is a solution containing nitric acid with the mass percentage of 0.5%. And when the aluminum foil finishes the secondary pore-forming corrosion, taking out the aluminum foil from the corrosion liquid tank, and then carrying out liquid spraying on the aluminum foil by using a secondary pore-forming corrosion solution, wherein the spraying flow rate is 18L/h.
And the reaming corrosion is to put the aluminum foil subjected to the secondary reaming corrosion into reaming corrosion liquid at the temperature of 60 ℃, wherein the reaming corrosion liquid is a hydrochloric acid solution with the mass percentage of 10%, and the chemical reaming corrosion is carried out for 300 s.
And adding a complexing agent into the reaming corrosive liquid, wherein the complexing agent is a sulfonic acid-containing compound or a salt thereof.
The sulfonic acid compound or the salt thereof is poly-benzenesulfonic acid or sodium poly-benzenesulfonic acid with the molecular mass of 50000.
And the post-treatment is to soak the aluminum foil subjected to pore-expanding corrosion in a nitric acid solution with the mass percent of 2%, wherein the temperature is 50 ℃ and the time is 50 s.
Comparative example 1
The same procedure as in example 1 was repeated except that spraying was not performed as in example 1.
Example 2
The preparation method of the corrosion foil comprises five steps of pretreatment, primary holing corrosion, secondary holing corrosion, reaming corrosion and post-treatment of a high-purity aluminum foil, wherein the pretreatment is to put an aluminum foil into pretreatment liquid to be soaked for 65 s; cleaning, placing in a first etching mixed solution at 80 deg.C, and applying current at 1800mA/cm
2Carrying out electrolytic corrosion for 70s by direct current, cleaning by pure water, putting into a hydrochloric acid solution containing 11% at the temperature of 75 ℃, and carrying out chemical corrosion for 350 s; and finally, cleaning with pure water, and drying in an oven at the temperature of 120 ℃.
Wherein, the first-stage pore formation corrosion is to be pretreatedPlacing the aluminum foil in a first-stage pore-forming corrosive liquid at the temperature of 80 ℃, and applying a current with the density of 1800mA/cm
2The primary pore-forming corrosion solution is a mixed solution containing 2% by mass of hydrochloric acid and 8% by mass of sulfuric acid. When the aluminum foil finishes the primary perforation corrosion, the aluminum foil is taken out from the corrosion liquid tank and then is subjected to liquid spraying by using a primary perforation corrosion solution, and the spraying flow rate is 18L/h.
The secondary pore-forming corrosion is to put the aluminum foil after the primary pore-forming corrosion in a secondary pore-forming corrosion solution at the temperature of 75 ℃ and apply a current with the density of 350mA/cm
2The direct current of (2) is used for carrying out the pore-forming corrosion for 250s, and the secondary pore-forming corrosion solution is a solution containing nitric acid with the mass percentage of 0.8%. And when the aluminum foil finishes the secondary pore-forming corrosion, taking out the aluminum foil from the corrosion liquid tank, and then carrying out liquid spraying on the aluminum foil by using a secondary pore-forming corrosion solution, wherein the spraying flow rate is 18L/h.
And the reaming corrosion is to put the aluminum foil subjected to the secondary reaming corrosion into reaming corrosion liquid at the temperature of 75 ℃, wherein the reaming corrosion liquid is a hydrochloric acid solution with the mass percentage of 11%, and the chemical reaming corrosion is carried out for 350 s.
And adding a complexing agent into the reaming corrosive liquid, wherein the complexing agent is a sulfonic acid-containing compound or a salt thereof.
The sulfonic acid compound or the salt thereof is poly-benzenesulfonic acid or sodium poly-benzenesulfonic acid with the molecular mass of 50000.
And the post-treatment is to soak the aluminum foil subjected to reaming corrosion in a nitric acid solution with the mass percent of 2%, wherein the temperature is 65 ℃ and the time is 50 s.
Comparative example 2
The same procedure as in example 2 was repeated except that spraying was not performed as in example 2.
Example 3
The preparation method of the corrosion foil comprises five steps of pretreatment, primary holing corrosion, secondary holing corrosion, reaming corrosion and post-treatment of a high-purity aluminum foil, wherein the pretreatment is to put an aluminum foil into pretreatment liquid to be soaked for 70 s; then cleaning, placing the obtained product in a primary corrosion mixed solution at the temperature of 85 ℃, and applying a current with the density of 2100mA/cm
2Carrying out electrolytic corrosion for 75s by direct current, cleaning by pure water, putting into a hydrochloric acid solution containing 12% at the temperature of 90 ℃, and carrying out chemical corrosion for 400 s; and finally, cleaning with pure water, and drying in an oven at the temperature of 150 ℃.
Wherein, the first-stage pore forming corrosion is to place the pre-treated aluminum foil in a first-stage pore forming corrosion solution at the temperature of 85 ℃ and apply a current with the density of 2100mA/cm
2The primary pore-forming corrosion solution is a mixed solution containing 3% by mass of hydrochloric acid and 10% by mass of sulfuric acid. When the aluminum foil finishes the primary perforation corrosion, the aluminum foil is taken out from the corrosion liquid tank and then is subjected to liquid spraying by using a primary perforation corrosion solution, and the spraying flow rate is 18L/h.
The secondary pore-forming corrosion is to put the aluminum foil after the primary pore-forming corrosion in a secondary pore-forming corrosion solution at the temperature of 85 ℃ and apply a current with the density of 400mA/cm
2The direct current is used for carrying out the pore-forming corrosion for 300s, and the secondary pore-forming corrosion solution is a solution containing 1% nitric acid by mass. And when the aluminum foil finishes the secondary pore-forming corrosion, taking out the aluminum foil from the corrosion liquid tank, and then carrying out liquid spraying on the aluminum foil by using a secondary pore-forming corrosion solution, wherein the spraying flow rate is 18L/h.
And the reaming corrosion is to put the aluminum foil subjected to the secondary reaming corrosion into reaming corrosion liquid at the temperature of 90 ℃, wherein the reaming corrosion liquid is a hydrochloric acid solution with the mass percentage of 12%, and the chemical reaming corrosion is carried out for 300 s.
And adding a complexing agent into the reaming corrosive liquid, wherein the complexing agent is a sulfonic acid-containing compound or a salt thereof.
The sulfonic acid compound or the salt thereof is poly-benzenesulfonic acid or sodium poly-benzenesulfonic acid with the molecular mass of 50000.
And the post-treatment is to soak the aluminum foil subjected to reaming corrosion in a nitric acid solution with the mass percent of 2% at the temperature of 80 ℃ for 50 s.
Comparative example 3
The same procedure as in example 3 was repeated except that no spraying was performed as in example 3.
Performance verification
The results show that the specific volume dispersion rate of the corrosion foil is greatly reduced, the bending strength is greatly improved, the liquid spraying treatment method is simple in treatment process and convenient to operate, the surface of the treated corrosion foil is free from chromatic aberration, trace elements beneficial to pore generation are not treated and are not deformed, the early effect is ideal, the surface pore density is uniform and dense, the later-stage further operation is facilitated, the specific volume dispersion rate is greatly reduced, and the bending performance of the corrosion foil for the aluminum electrolytic capacitor is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. A method for manufacturing a corrosion foil comprises five steps of pretreatment, primary hole-forming corrosion, secondary hole-forming corrosion, reaming corrosion and post-treatment of an aluminum foil, and is characterized in that:
1) pretreatment: soaking the aluminum foil in the pretreatment liquid for 60-70 s; cleaning, placing in a primary corrosion mixed solution at 70-85 deg.C, and applying current at 1800mA/cm
2The direct current is used for electrolytic corrosion for 65-75s, the alloy is cleaned by pure water and is placed into a hydrochloric acid solution containing 10-12% at the temperature of 60-90 ℃, and the chemical corrosion is carried out for 300-400 s; finally, cleaning with pure water and then drying in an oven with the temperature of 100-150 ℃;
2) primary pitting corrosion: placing the pretreated aluminum foil in a first-stage pore-forming corrosive liquid at the temperature of 70-85 ℃, and applying a current with the density of 1500-2100mA/cm
2Is subjected to pore-forming corrosion by direct currentEtching for 65-75s, wherein the primary pore-forming etching solution is a mixed solution containing 1-3% of hydrochloric acid and 6-10% of sulfuric acid in percentage by mass;
3) secondary pitting corrosion: placing the aluminum foil corroded by the primary hole in a secondary hole corrosion solution at the temperature of 80-85 ℃, and applying a current with the density of 300-400mA/cm
2Performing power hole corrosion for 200 and 300 seconds by direct current;
4) reaming and corroding: placing the aluminum foil subjected to the secondary pore forming corrosion in a pore-expanding corrosion solution at the temperature of 60-90 ℃ for chemical pore-expanding corrosion for 300-400 seconds;
5) and (3) post-treatment: and soaking the aluminum foil subjected to pore-expanding corrosion in a nitric acid solution at the temperature of 50-80 ℃.
2. Method for producing an etched foil according to claim 1, characterized in that: the primary pore-forming corrosive liquid contains a complexing agent, and the complexing agent comprises a xanthic acid compound or salt thereof.
3. Method for producing an etched foil according to claim 2, characterized in that: the complexing agent is polysulfonic acid or sodium polysulfonate, and the molecular mass is 50000.
4. Method for producing an etched foil according to claim 3, characterized in that: and (3) spraying liquid by using a primary pore-forming corrosive solution before the aluminum foil treated in the step 2) enters the step 3).
5. Method for producing an etched foil according to claim 1, characterized in that: the secondary pore-forming corrosive liquid is a nitric acid solution with the mass percentage of 0.5-1%.
6. Method for producing an etched foil according to claim 5, characterized in that: and (3) spraying liquid by using a secondary pore-forming corrosive solution before the aluminum foil treated in the step 4).
7. Method for producing an etched foil according to claim 4 or 6, characterized in that: the spraying flow rate of the liquid spraying is 18L/h.
8. Method for producing an etched foil according to claim 1, characterized in that: the reaming corrosion liquid is a hydrochloric acid solution with the mass percentage of 10-12%.
9. Method for producing an etched foil according to claim 1, characterized in that: the nitric acid solution used for the post-treatment is a solution of nitric acid with the mass percentage of 2%.
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| CN201910992622.XA CN110783108B (en) | 2019-10-18 | 2019-10-18 | Method for manufacturing corrosion foil |
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| CN201910992622.XA CN110783108B (en) | 2019-10-18 | 2019-10-18 | Method for manufacturing corrosion foil |
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| CN110877916A (en) * | 2019-11-27 | 2020-03-13 | 新疆众和股份有限公司 | Method for producing tubular titanium dioxide |
| CN111519239A (en) * | 2020-05-18 | 2020-08-11 | 南通海星电子股份有限公司 | Etching method for ultrahigh-pressure etched foil |
| CN112853456A (en) * | 2021-01-07 | 2021-05-28 | 佛山科学技术学院 | Method for manufacturing high-pressure high-specific-volume corrosion foil |
| CN113882011A (en) * | 2021-08-20 | 2022-01-04 | 扬州宏远电子股份有限公司 | Anode foil corrosion process for alternating current aluminum electrolytic capacitor |
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| WO2023056725A1 (en) * | 2021-10-09 | 2023-04-13 | 南通海星电子股份有限公司 | Method for preparing corroded aluminum foil having high hole length consistency |
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| WO2023056725A1 (en) * | 2021-10-09 | 2023-04-13 | 南通海星电子股份有限公司 | Method for preparing corroded aluminum foil having high hole length consistency |
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