CN113628888B - 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
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- CN113628888B CN113628888B CN202111177085.7A CN202111177085A CN113628888B CN 113628888 B CN113628888 B CN 113628888B CN 202111177085 A CN202111177085 A CN 202111177085A CN 113628888 B CN113628888 B CN 113628888B
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- aluminum foil
- hole length
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
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- 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
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/04—Etching of light metals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (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)
- Cell Electrode Carriers And Collectors (AREA)
- Weting (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 initial point is easy to master, the control of the corrosion initial point is realized through the control of the corresponding concentration and the temperature of the novel pretreatment liquid in the pretreatment process, the holes on the surface of the corrosion aluminum foil prepared by the process are distributed more uniformly, the hole length consistency is good, and the bending and electrical property of the corrosion aluminum foil can be effectively improved.
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 |
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| CN113628888A CN113628888A (en) | 2021-11-09 |
| CN113628888B true CN113628888B (en) | 2021-12-10 |
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| 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) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN114059145B (en) * | 2021-11-10 | 2023-05-26 | 乳源瑶族自治县东阳光化成箔有限公司 | Low-voltage corrosion foil and preparation method and application thereof |
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 |
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2021
- 2021-10-09 CN CN202111177085.7A patent/CN113628888B/en active Active
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2022
- 2022-02-22 JP JP2022543065A patent/JP7437514B2/en active Active
- 2022-02-22 WO PCT/CN2022/077204 patent/WO2023056725A1/en active Application Filing
- 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202315975A (en) | 2023-04-16 |
| JP2023548990A (en) | 2023-11-22 |
| TWI816501B (en) | 2023-09-21 |
| WO2023056725A1 (en) | 2023-04-13 |
| JP7437514B2 (en) | 2024-02-22 |
| CN113628888A (en) | 2021-11-09 |
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