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 PDF

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Publication number
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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China
Prior art keywords
aluminium foil
aluminium
concentration
handled
temperature
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CN201711158893.2A
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Chinese (zh)
Inventor
李慈祥
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Hubei Fu Fittec Electronics Technology Co Ltd
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Hubei Fu Fittec Electronics Technology Co Ltd
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Priority to CN201711158893.2A priority Critical patent/CN108004547A/en
Publication of CN108004547A publication Critical patent/CN108004547A/en
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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23FNON-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
    • C23F1/00Etching metallic material by chemical means
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/16Acidic compositions
    • C23F1/20Acidic compositions for etching aluminium or alloys thereof
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12Light metals
    • C23G1/125Light metals aluminium
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/22Light 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

A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process
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)

  1. 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.
  2. 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.
  3. 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.
  4. 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.
CN201711158893.2A 2017-11-20 2017-11-20 A kind of aluminium electrolytic capacitor cathode aluminium foil corrosion new process Pending CN108004547A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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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CN1489161A (en) * 2003-08-21 2004-04-14 上海交通大学 Method for removing residual copper of aluminium corroding foil surface of negative electrode for aluminium electrolytic capacitor
CN1533578A (en) * 2001-08-03 2004-09-29 昭和电工株式会社 Process for producing aluminium material for electrode of electrolytic capacitor, aluminium material for electrode of electrolytic capacitor and method for producing electrode material
CN1861846A (en) * 2006-03-27 2006-11-15 无锡市骏达交通环保有限公司 Removing process of residual copper on cathode foil surface for improved aluminium electrolyzing capacitor
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CN102094231A (en) * 2011-01-11 2011-06-15 江苏立富电极箔有限公司 Process for corroding anode foil for intermediate and high voltage aluminum electrolytic capacitor
CN103187176A (en) * 2013-03-22 2013-07-03 常州大学 Corrosion technology of anode aluminum foil of electrolysis capacitor
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
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CN1533578A (en) * 2001-08-03 2004-09-29 昭和电工株式会社 Process for producing aluminium material for electrode of electrolytic capacitor, aluminium material for electrode of electrolytic capacitor and method for producing electrode material
CN1489161A (en) * 2003-08-21 2004-04-14 上海交通大学 Method for removing residual copper of aluminium corroding foil surface of negative electrode for aluminium electrolytic capacitor
CN1861846A (en) * 2006-03-27 2006-11-15 无锡市骏达交通环保有限公司 Removing process of residual copper on cathode foil surface for improved aluminium electrolyzing capacitor
CN1920114A (en) * 2006-08-02 2007-02-28 扬州宏远电子有限公司 Corrosion method of anode foil for low-voltage aluminum electrolytic capacitor
CN1967752A (en) * 2006-11-06 2007-05-23 乳源瑶族自治县东阳光化成箔有限公司 A low-voltage anode foil used for aluminium electrolytic capacitor and its manufacturing method
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CN101649458A (en) * 2009-06-23 2010-02-17 吴江飞乐天和电子材料有限公司 Method for reducing residual copper on surface of cathode foil of aluminum electrolytic capacitor
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* Cited by examiner, † Cited by third party
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