CN113628888A - Preparation method of corrosion aluminum foil with high consistency of hole length - Google Patents
Preparation method of corrosion aluminum foil with high consistency of hole length Download PDFInfo
- Publication number
- CN113628888A CN113628888A CN202111177085.7A CN202111177085A CN113628888A CN 113628888 A CN113628888 A CN 113628888A CN 202111177085 A CN202111177085 A CN 202111177085A CN 113628888 A CN113628888 A CN 113628888A
- Authority
- CN
- China
- Prior art keywords
- corrosion
- aluminum foil
- pretreatment liquid
- hole length
- pretreatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 59
- 238000005260 corrosion Methods 0.000 title claims abstract description 59
- 239000011888 foil Substances 0.000 title claims abstract description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 8
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 7
- 239000008103 glucose Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- -1 hydrogen ions Chemical class 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005452 bending Methods 0.000 abstract description 3
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 11
- 235000013619 trace mineral Nutrition 0.000 description 5
- 239000011573 trace mineral Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/055—Etched foil electrodes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Power Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- ing And Chemical Polishing (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Weting (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention relates to the technical field of manufacturing processes of corrosion foils, and discloses a preparation method of a corrosion aluminum foil with high consistency of hole length, which comprises the following steps: a) placing the aluminum foil in a novel pretreatment liquid, applying a short-time large direct current to carry out pretreatment to generate a corrosion initial point; b) carrying out pore-forming corrosion in the primary corrosion liquid; c) carrying out reaming corrosion in secondary corrosion liquid; d) and obtaining the corroded aluminum foil after heat treatment. The novel pretreatment liquid is mainly mixed aqueous solution of mixed acid and glucose, the distribution condition of the corrosion starting point is easy to master, and the control of the corrosion starting point is realized by controlling the corresponding concentration and temperature of the novel pretreatment liquid in the pretreatment process. The corroded aluminum foil prepared by the process has more uniform surface hole distribution and good hole length consistency, and can effectively improve the bending and electrical properties of the corroded aluminum foil.
Description
Technical Field
The invention relates to the technical field of manufacturing processes of corrosion foils, in particular to a preparation method of a corrosion aluminum foil with high uniformity of hole length.
Background
The anode corrosion aluminum foil for the aluminum electrolytic capacitor is mainly manufactured by the steps of forming high-density tunnel holes on the surface of the aluminum foil through pretreatment, primary hole-forming corrosion, secondary hole-expanding corrosion, post-treatment, heat treatment and the like, so that the specific surface area of the aluminum foil is expanded and the unit area capacity is improved. Primary hole forming is usually carried out in a hydrochloric acid and sulfuric acid mixed solution to form a long and thin tunnel hole with small aperture and deep depth; the secondary reaming corrosion is usually performed in a nitric acid solution, and the small-aperture tunnel holes formed in the holing corrosion are enlarged into larger-aperture tunnel holes, so that a larger specific surface area is obtained. The holing process plays an important role in the distribution of pores on the surface of the etched foil product and the uniformity of the length of the pores.
At present, trace elements such as Fe, Si, Cu and the like are generally added in the production of the optical foil, and the trace elements are considered to be corrosion starting points of primary hole forming corrosion, so that the energy required by hole forming can be reduced, and the hole forming difficulty can be reduced. However, the addition amount of trace elements is very low, which is generally only 0.0002% -0.0005%, and the dispersion condition of the trace elements on the surface of the aluminum foil is lack of an economical and effective detection means, so that the method for adding trace elements cannot effectively increase the uniformity of surface pore distribution and pore length uniformity, and the distribution of corrosion starting points is difficult to control, so that the problems of perforation sequence, uneven surface pore distribution, poor uniformity of pore length of tunnel pores, and more short pores still exist in the actual production process.
Disclosure of Invention
In order to solve the problems and overcome the defects in the prior art, the invention provides the process preparation method which has the advantages of more uniform distribution of holes on the surface of the corrosion aluminum foil, good consistency of the length of the holes and capability of effectively improving the bending and electrical properties of the corrosion aluminum foil.
The invention is realized by the following technical scheme: a preparation method of a corrosion aluminum foil with high consistency of hole length is characterized by comprising the following steps: the method comprises the following steps:
step a), pretreatment: putting the cleaned aluminum foil in novel pretreatment liquid, electrifying for 1-3s under the condition of constant pressure of 40-400V, and performing pretreatment to generate a corrosion initial point on the surface of the aluminum foil; the novel pretreatment liquid is a mixed solution of acid and glucose;
and b), carrying out hole forming corrosion on the pretreated aluminum foil in primary corrosion liquid, carrying out hole expanding corrosion in secondary corrosion liquid, and cleaning and carrying out heat treatment to obtain a finished product corrosion foil.
Further, the acid in the novel pretreatment liquid is H2C2O4、H2SO4、HCl、H3PO4One or a mixture of several acids.
Furthermore, the content of free hydrogen ions in the novel pretreatment liquid is 0.6-1.0M.
Further, the glucose content in the pretreatment liquid is 1-10 g/L.
Further, the temperature of the pretreatment liquid in the step a) is 15-30 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the novel pretreatment liquid disclosed in the manufacturing method of the corrosion aluminum foil adopts the mixed solution of acid and glucose, the corrosion starting points in the pretreatment are uniformly distributed on the surface of the aluminum foil, the distribution condition of the corrosion starting points is easy to master, the control of the corrosion starting points is realized by controlling the corresponding concentration and temperature of the novel pretreatment liquid in the pretreatment process, and the guarantee is provided for the consistency of the subsequent multi-stage pore formation.
2. The invention discloses a method for manufacturing a corrosion aluminum foil, which can form regular corrosion pits on the surface of the corrosion aluminum foil through constant voltage and large current in a short time in the pretreatment process, provide a corrosion starting point for subsequent pitting corrosion, improve the consistency of the lengths of the pitting corrosion foil and the final finished product corrosion foil, and further improve the capacity and the bending performance of the finished product corrosion foil.
Drawings
Fig. 1 is a sectional view of a corroded aluminum foil manufactured using a method of manufacturing a corroded aluminum foil according to an embodiment of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.
Example (b):
step 1, pretreatment: placing the aluminum foil at 20 ℃ and the temperature is 0.3mol/L H2C2O4Pre-treating in a novel pre-treating liquid prepared by mixing 3g/L glucose solution, wherein the voltage of the pre-treating is 100V, the treating time is 1S, and a corrosion initial point is formed on the surface of the aluminum foil;
step 2, corrosion of the hair holes: washing the aluminum foil in the step 1 with pure water, and placing the aluminum foil in 0.5mol/L HCL and 1.2mol/L H at 70 DEG C2C2O4Carrying out pore corrosion in the solution, wherein the pore current is the gradient attenuation current of maximum 1.5A/cm2, the power-up time is 65s, and repeating the step for 3 times;
step 3, reaming corrosion: cleaning the aluminum foil obtained in the step 2 by using pure water, placing the aluminum foil in 0.3mol/L HNO3 solution at 70 ℃ for reaming corrosion, performing constant-current reaming with the reaming current of 0.4A/cm2 for 120s, and repeating the step for 3 times;
step 4, heat treatment: soaking the aluminum foil obtained in the step 3 in 0.03ml/L HNO3 solution at 50 ℃ for 60s to wash out impurity ions; and cleaning with pure water, and placing in a 120 ℃ oven for heat treatment for 80s to obtain the corroded aluminum foil with consistent hole length and height.
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. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. A preparation method of a corrosion aluminum foil with high consistency of hole length is characterized by comprising the following steps: the method comprises the following steps:
step a), pretreatment: putting the cleaned aluminum foil in novel pretreatment liquid, electrifying for 1-3s under the condition of constant pressure of 40-400V, and performing pretreatment to generate a corrosion initial point on the surface of the aluminum foil; the novel pretreatment liquid is a mixed solution of acid and glucose;
step b), hair hole corrosion: and (3) carrying out holing corrosion on the pretreated aluminum foil in a primary corrosion solution, carrying out reaming corrosion in a secondary corrosion solution, and cleaning and carrying out heat treatment to obtain a finished corrosion foil.
2. The method for preparing the corrosion aluminum foil with high uniformity of hole length according to claim 1, wherein: the acid in the novel pretreatment liquid is H2C2O4、H2SO4、HCl、H3PO4One or a mixture of several acids.
3. The method for preparing the corrosion aluminum foil with high uniformity of hole length according to claim 2, is characterized in that: the content of free hydrogen ions in the novel pretreatment liquid is 0.6-1.0M.
4. The method for preparing the corrosion aluminum foil with high uniformity of hole length according to claim 1, wherein: the glucose content in the pretreatment liquid is 1-10 g/L.
5. The method for preparing the corrosion aluminum foil with high uniformity of hole length according to claim 1, wherein: the temperature of the pretreatment liquid in the step a) is 15-30 ℃.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111177085.7A CN113628888B (en) | 2021-10-09 | 2021-10-09 | Preparation method of corrosion aluminum foil with high consistency of hole length |
PCT/CN2022/077204 WO2023056725A1 (en) | 2021-10-09 | 2022-02-22 | Method for preparing corroded aluminum foil having high hole length consistency |
JP2022543065A JP7437514B2 (en) | 2021-10-09 | 2022-02-22 | Method for manufacturing etched aluminum foil with highly consistent pore length |
TW111129238A TWI816501B (en) | 2021-10-09 | 2022-08-03 | Preparation method of etched aluminum foil with high consistency in hole length |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111177085.7A CN113628888B (en) | 2021-10-09 | 2021-10-09 | Preparation method of corrosion aluminum foil with high consistency of hole length |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113628888A true CN113628888A (en) | 2021-11-09 |
CN113628888B CN113628888B (en) | 2021-12-10 |
Family
ID=78390896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111177085.7A Active CN113628888B (en) | 2021-10-09 | 2021-10-09 | Preparation method of corrosion aluminum foil with high consistency of hole length |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP7437514B2 (en) |
CN (1) | CN113628888B (en) |
TW (1) | TWI816501B (en) |
WO (1) | WO2023056725A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114059145A (en) * | 2021-11-10 | 2022-02-18 | 乳源瑶族自治县东阳光化成箔有限公司 | Low-pressure corrosion foil and preparation method and application thereof |
CN114864288A (en) * | 2022-05-17 | 2022-08-05 | 富之庆电子(深圳)有限公司 | Preparation method and preparation device of high-voltage solid capacitor |
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 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101142333A (en) * | 2005-03-17 | 2008-03-12 | 昭和电工株式会社 | Process for producing aluminum material for electrolytic capacitor electrode, aluminum material for electrolytic capacitor electrode, process for producing electrolytic capacitor electrode material, a |
CN108183033A (en) * | 2018-03-02 | 2018-06-19 | 东莞东阳光科研发有限公司 | A kind of anode foil for aluminum electrolytic capacitor etching process |
CN109750346A (en) * | 2018-12-17 | 2019-05-14 | 中南大学 | A kind of manufacture craft of mesohigh etched foil |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4762791B2 (en) | 2006-05-31 | 2011-08-31 | ニチコン株式会社 | Method for producing electrode foil for electrolytic capacitor |
JP2009231517A (en) | 2008-03-22 | 2009-10-08 | Nichicon Corp | Method of manufacturing etching foil for electrolytic capacitor |
US9029268B2 (en) * | 2012-11-21 | 2015-05-12 | Dynaloy, Llc | Process for etching metals |
CN104593848A (en) * | 2014-12-27 | 2015-05-06 | 西安交通大学 | Surface modification method for enhancing specific volume of etched aluminum foil |
CN105140039A (en) * | 2015-09-07 | 2015-12-09 | 江苏国瑞科技股份有限公司 | Pre-processing technology of aluminum foil corrosion |
CN107502948A (en) * | 2017-07-15 | 2017-12-22 | 江苏国瑞科技有限公司 | A kind of new etched foil counter-boring techniques |
KR20190011484A (en) * | 2017-07-25 | 2019-02-07 | 삼성전자주식회사 | Aluminium alloy sheet and manufacturing method thereof |
CN108330475B (en) * | 2017-12-29 | 2020-10-13 | 广东省建筑科学研究院集团股份有限公司 | High-corrosion-resistance marine aluminum alloy surface metal-organic framework film treatment liquid and use method thereof |
CN110055571B (en) | 2019-04-18 | 2020-05-22 | 宜都东阳光化成箔有限公司 | Pretreatment solution for improving medium-high voltage formed foil capacity for aluminum electrolytic capacitor and forming process |
CN110783108B (en) * | 2019-10-18 | 2022-03-25 | 佛山科学技术学院 | Method for manufacturing corrosion foil |
CN111430726B (en) * | 2020-06-10 | 2020-09-11 | 河南绿动能源科技有限公司 | Preparation method of aluminum current collector for lithium ion battery and aluminum current collector |
CN113628888B (en) * | 2021-10-09 | 2021-12-10 | 南通海星电子股份有限公司 | Preparation method of corrosion aluminum foil with high consistency of hole length |
-
2021
- 2021-10-09 CN CN202111177085.7A patent/CN113628888B/en active Active
-
2022
- 2022-02-22 WO PCT/CN2022/077204 patent/WO2023056725A1/en active Application Filing
- 2022-02-22 JP JP2022543065A patent/JP7437514B2/en active Active
- 2022-08-03 TW TW111129238A patent/TWI816501B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101142333A (en) * | 2005-03-17 | 2008-03-12 | 昭和电工株式会社 | Process for producing aluminum material for electrolytic capacitor electrode, aluminum material for electrolytic capacitor electrode, process for producing electrolytic capacitor electrode material, a |
CN108183033A (en) * | 2018-03-02 | 2018-06-19 | 东莞东阳光科研发有限公司 | A kind of anode foil for aluminum electrolytic capacitor etching process |
CN109750346A (en) * | 2018-12-17 | 2019-05-14 | 中南大学 | A kind of manufacture craft of mesohigh etched foil |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN114059145A (en) * | 2021-11-10 | 2022-02-18 | 乳源瑶族自治县东阳光化成箔有限公司 | Low-pressure corrosion foil and preparation method and application thereof |
CN114864288A (en) * | 2022-05-17 | 2022-08-05 | 富之庆电子(深圳)有限公司 | Preparation method and preparation device of high-voltage solid capacitor |
Also Published As
Publication number | Publication date |
---|---|
TWI816501B (en) | 2023-09-21 |
WO2023056725A1 (en) | 2023-04-13 |
JP7437514B2 (en) | 2024-02-22 |
TW202315975A (en) | 2023-04-16 |
JP2023548990A (en) | 2023-11-22 |
CN113628888B (en) | 2021-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113628888B (en) | Preparation method of corrosion aluminum foil with high consistency of hole length | |
CN106653373B (en) | A kind of aluminium electrolutic capacitor Waste Acid From Hua Cheng Foil and its production technology | |
CN108456916B (en) | Corrosion method of medium-high voltage electronic aluminum foil | |
CN110783108B (en) | Method for manufacturing corrosion foil | |
CN113026087B (en) | Preparation method of nano-microporous structure aluminum electrode foil for automobile electronics | |
CN108183033B (en) | Anode foil corrosion process for aluminum electrolytic capacitor | |
CN110578163B (en) | Manufacturing method of medium-pressure corrosion foil | |
CN109554746B (en) | Method for manufacturing high-pressure high-specific-volume corrosion foil | |
CN105420803A (en) | Method for ultrasonic-assisted corrosion of middle-high voltage anode aluminum foil | |
CN104499028A (en) | Manufacturing method of ultralow-voltage anodized aluminum foil | |
WO2019041797A1 (en) | Etching method for electrode foil for low-contact resistance low-voltage aluminum electrolytic capacitor | |
CN112080787B (en) | Corrosion foil for aluminum electrolytic capacitor and preparation method thereof | |
CN104357886A (en) | Method for chemically depositing diffused tin-zinc crystal nucleus on surface of high-purity aluminum foil for medium/high-voltage positive electrode | |
CN110783110A (en) | Method for manufacturing electrode foil for solid-state capacitor | |
CN109797424B (en) | Method for treating five-level pore formation corrosion of medium-high voltage anode aluminum foil | |
CN111733443B (en) | Method for manufacturing electrode foil for aluminum electrolytic capacitor and electrode foil | |
CN102888642A (en) | Preparation method of large-area high-order porous anodised aluminium film | |
CN103132122B (en) | Steel wire on-line normal-temperature electrolytic phosphatization method | |
CN114808076B (en) | Preparation method of electrode foil with good bending performance | |
CN103305890B (en) | The preparation method of the anodic oxidation aluminium formwork that three-dimensional runs through | |
CN105977029B (en) | A kind of hair engaging aperture caustic solution controlling aluminium foil tunnel hole length and its consistency | |
CN113106518A (en) | Method for manufacturing low-voltage formed foil for solid aluminum electrolytic capacitor | |
CN111748839A (en) | Preparation method of medium-high voltage corrosion foil for aluminum electrolytic capacitor and anode foil | |
CN110983422A (en) | Method for preparing porous copper foil by square wave electrochemical etching | |
CN104616898A (en) | Method for improving hole production performance of aluminum foil through additional annealing treatment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |