CN108004547A - A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process - Google Patents
A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process Download PDFInfo
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- CN108004547A CN108004547A CN201711158893.2A CN201711158893A CN108004547A CN 108004547 A CN108004547 A CN 108004547A CN 201711158893 A CN201711158893 A CN 201711158893A CN 108004547 A CN108004547 A CN 108004547A
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- aluminium foil
- aluminium
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- temperature
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Classifications
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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
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process, alkaline cleaning can be increased, a kind of colloid of surface positively charged is generated in cleaning solution, adsorb aluminium foil remained on surface chlorion, aluminium foil surface residual chlorion meets international standards in 0.5~0.8mg/m2 after processing；Increase at the same time makes aluminium foil surface purity higher, properties of product are more excellent except nitric acid+a small amount of copper of oxidant removing aluminium foil surface and iron is used mixedly.Aluminium electrolutic capacitor quality higher is produced, service life is longer, when small more than 10000 when small (common product 2000).
Description
Technical field
It is new more particularly, to a kind of aluminium electrolytic capacitor cathode aluminium foil corrosion the present invention relates to a kind of aluminium foil manufacturing process
Technique.
Background technology
Known, existing aluminium electrolytic capacitor cathode aluminium foil needs increase negative to increase capacitor reserve of electricity (capacity)
Pole paper tinsel surface area, general technology are：Aluminium foil oil removing (2%NaOH, 50 DEG C, 10s), extended surface corrosion (hydrochloric acid+sulphuric acid) is particularly
(8%HCl+2%H2SO4；90~110 DEG C, 20S), middle processing (dust technology) particularly (5%HNO3,40 DEG C, 30S), phosphoric acid
Post processing (5%H3PO4,50 DEG C, 30S), toast (500~550 DEG C), winding.
Processing is cleaned with dust technology in this technique, and nitric acid produces steam, while nitrate anion and aluminium foil surface with aluminium foil reaction
Chlorion produces competitive Adsorption, chlorine subband will go out in aluminium foil surface hole, and be cleaned, but cleaning performance is undesirable, chlorine from
Son residual is relatively more (being typically larger than 4mg/m2), it is impossible to meets customer requirement, more than international standard 1mg/m2, product can only use
In low-quality product.
The content of the invention
To solve, existing Chloride residue relatively more provides a kind of aluminium electrolytic capacitor cathode aluminium foil corrosion to the present invention
New process.
The present invention is that concrete technical scheme is used by solving above-mentioned technical problem：A kind of aluminium electrolytic capacitor cathode is used
Aluminium foil corrosion new process, includes the following steps：
Step 1：The aluminium foil oil removing stage, particularly by aluminium foil concentration be 2% sodium hydroxide NaOH, at 40~50 DEG C
Under conditions of the oil removing of 5-20 seconds is carried out to aluminium foil；
Step 2：Extended surface is corroded the stage, aluminium foil after particularly step 1 is handled in the hydrochloric acid HCl that concentration is 8% and
The sulfuric acid H2SO4 that concentration is 2% reacts 20 seconds under conditions of being 90~110 DEG C in temperature；
Step 3：Middle processing stage, aluminium foil after particularly step 2 is handled are 5% nitric acid HNO3 in temperature in concentration
To react 20 seconds under conditions of 40 DEG C；
Step 4：Alkaline wash phase, the aluminium foil after particularly step 3 is handled is in the condition that temperature is 40~70 DEG C
Under, concentration is reacted 20-40 seconds for the aluminium ion Al3+ of 0.2~2% sodium carbonate NaCO3 and positive trivalent under the action of catalyst；
Step 5：Removal of impurities stage, the aluminium foil after particularly step 4 is handled are dense under conditions of temperature is 40~60 DEG C
Spend under the action of nitric acid HNO3 and oxidant for 0.2~2% and react 20-40 seconds；
Step 6：Post-processing stages, the aluminium foil after particularly step 5 is handled is under conditions of temperature is 50 DEG C, concentration
To be reacted 30 seconds under the action of 5% phosphoric acid H3PO4；
Step 7：The baking stage, aluminium foil after particularly step 6 is handled under conditions of temperature is 500~550 DEG C,
Toasted；
Step 8：Retracting.
Further, in the step 4, alkaline wash phase, the aluminium foil after particularly step 3 is handled is in temperature
Under conditions of 50 DEG C, concentration is 0.2~2% sodium carbonate NaCO3 and the aluminium ion Al3+ of positive trivalent under the action of catalyst
Reaction 30 seconds；
Further, in the step 5, clean the stage, the aluminium foil after particularly step 4 is handled is 45 in temperature
Under conditions of DEG C, reacted 30 seconds under the action of the oxydol H 2O2 that nitric acid HNO3 and concentration that concentration is 0.2~2% are 3%；
Further, the catalyst includes phosphate and organic amine salt.
The beneficial effects of the invention are as follows：A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process, by increasing capacitance it is possible to increase alkalescence
Cleaning, generates a kind of colloid of surface positively charged in cleaning solution, adsorbs aluminium foil remained on surface chlorion, aluminium foil surface after processing
Chlorion is remained in 0.5~0.8mg/m2, is met international standards；Increase at the same time, which removes, uses mixedly nitric acid+oxidant removing aluminium foil surface
A small amount of copper and iron, make aluminium foil surface purity higher, properties of product are more excellent.Aluminium electrolutic capacitor quality higher is produced, uses the longevity
Order it is longer, when small more than 10000 when small (common product 2000).
Embodiment
With reference to body embodiment, the present invention is described in further detail:
A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process, includes the following steps：
Step 1：The aluminium foil oil removing stage, particularly by aluminium foil concentration be 2% sodium hydroxide NaOH, at 40~50 DEG C
Under conditions of the oil removing of 5-20 seconds is carried out to aluminium foil；
Step 2：Extended surface is corroded the stage, aluminium foil after particularly step 1 is handled in the hydrochloric acid HCl that concentration is 8% and
The sulfuric acid H2SO4 that concentration is 2% reacts 20 seconds under conditions of being 90~110 DEG C in temperature；
Step 3：Middle processing stage, aluminium foil after particularly step 2 is handled are 5% nitric acid HNO3 in temperature in concentration
To react 20 seconds under conditions of 40 DEG C；
Step 4：Alkaline wash phase, the aluminium foil after particularly step 3 is handled is in the condition that temperature is 40~60 DEG C
Under, concentration for 0.2~2% sodium carbonate NaCO3 and positive trivalent aluminium ion Al3+ the catalyst such as phosphate, organic amine salt work
With lower reaction 20-40 seconds；
Step 5：Removal of impurities stage, the aluminium foil after particularly step 4 is handled are dense under conditions of temperature is 40~60 DEG C
Spend under the action of nitric acid HNO3 and oxidant for 0.2~2% and react 20-40 seconds；
Step 6：Post-processing stages, the aluminium foil after particularly step 5 is handled is under conditions of temperature is 50 DEG C, concentration
To be reacted 30 seconds under the action of 5% phosphoric acid H3PO4；
Step 7：The baking stage, aluminium foil after particularly step 6 is handled under conditions of temperature is 500~550 DEG C,
Toasted；
Step 8：Retracting.
In the step 4, alkaline wash phase, aluminium foil after particularly step 3 is handled is 50 DEG C in temperature
Under the conditions of, concentration is 0.2~2% sodium carbonate NaCO3 and the aluminium ion Al3+ of positive trivalent in catalyst such as phosphate, organic amine salts
Under the action of react 30 seconds；
In the step 5, clean the stage, the aluminium foil after particularly step 4 is handled is in the condition that temperature is 45 DEG C
Under, reacted 30 seconds under the action of the oxydol H 2O2 that nitric acid HNO3 and concentration that concentration is 0.2~2% are 3%；
A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process, by increasing capacitance it is possible to increase alkalescence cleaning, generates in cleaning solution
A kind of colloid of surface positively charged, adsorbs aluminium foil remained on surface chlorion, after processing aluminium foil surface residual chlorion 0.5~
0.8mg/m2, meets international standards；Increase at the same time makes aluminium foil except nitric acid+a small amount of copper of oxidant removing aluminium foil surface and iron is used mixedly
Surface purity higher, properties of product are more excellent.Aluminium electrolutic capacitor quality higher is produced, service life is longer, small more than 10000
When small (common product 2000).
Basic principle, main feature and the advantages of the present invention of above content and structure the invention has been described product, one's own profession
The technical staff of industry should be recognized that.Merely illustrating the principles of the invention described in examples detailed above and specification, is not departing from this
On the premise of spirit and scope, various changes and modifications of the present invention are possible, these changes and improvements belong to requirement and protect
Within the scope of the invention of shield.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (4)
- A kind of 1. aluminium electrolytic capacitor cathode aluminium foil corrosion new process, it is characterised in that：Include the following steps：Step 1：The aluminium foil oil removing stage, particularly by aluminium foil concentration be 2% sodium hydroxide NaOH, in 40~50 DEG C of bar The oil removing of 5-20 seconds is carried out under part to aluminium foil；Step 2：Extended surface corrodes the stage, and the aluminium foil after particularly step 1 is handled is in the hydrochloric acid HCl and concentration that concentration is 8% Sulfuric acid H2SO4 for 2% reacts 20 seconds under conditions of being 90~110 DEG C in temperature；Step 3：Middle processing stage, aluminium foil after particularly step 2 is handled are that 5% nitric acid HNO3 in temperature is 40 in concentration Reacted 20 seconds under conditions of DEG C；Step 4：Alkaline wash phase, the aluminium foil after particularly step 3 is handled are dense under conditions of temperature is 40~70 DEG C The aluminium ion Al3+ spent for 0.2~2% sodium carbonate NaCO3 and positive trivalent reacts 20-40 seconds under the action of catalyst；Step 5：In the removal of impurities stage, under conditions of temperature is 40~60 DEG C, concentration is the aluminium foil after particularly step 4 is handled Reacted 20-40 seconds under the action of 0.2~2% nitric acid HNO3 and oxidant；Step 6：Post-processing stages, under conditions of temperature is 50 DEG C, concentration is the aluminium foil after particularly step 5 is handled Reacted 30 seconds under the action of 5% phosphoric acid H3PO4；Step 7：Baking stage, the aluminium foil after particularly step 6 is handled carry out under conditions of temperature is 500~550 DEG C Baking；Step 8：Retracting.
- A kind of 2. aluminium electrolytic capacitor cathode aluminium foil corrosion new process according to claim 1, it is characterised in that：It is described Step 4 in, alkaline wash phase, under conditions of temperature is 50 DEG C, concentration is for aluminium foil after particularly step 3 is handled 0.2~2% sodium carbonate NaCO3 and the aluminium ion Al3+ of positive trivalent react 30 seconds under the action of catalyst.
- A kind of 3. aluminium electrolytic capacitor cathode aluminium foil corrosion new process according to claim 1, it is characterised in that：It is described Step 5 in, clean the stage, aluminium foil after particularly step 4 is handled is under conditions of temperature is 45 DEG C, concentration 0.2 ~2% nitric acid HNO3 and concentration reacts 30 seconds under the action of being 3% oxydol H 2O2.
- A kind of 4. aluminium electrolytic capacitor cathode aluminium foil corrosion new process according to claim 1, it is characterised in that：It is described Catalyst include phosphate and organic amine salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158893.2A CN108004547A (en) | 2017-11-20 | 2017-11-20 | A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process |
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| CN201711158893.2A CN108004547A (en) | 2017-11-20 | 2017-11-20 | A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process |
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| CN108004547A true CN108004547A (en) | 2018-05-08 |
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| CN201711158893.2A Pending CN108004547A (en) | 2017-11-20 | 2017-11-20 | A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257893A (en) * | 2019-05-29 | 2019-09-20 | 安徽省临泉县康悦电子科技有限公司 | A kind of aluminum foil corrosion technique |
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Application publication date: 20180508 |