JPH0330309A - Formation of aluminum foil for electrolytic capacitor - Google Patents
Formation of aluminum foil for electrolytic capacitorInfo
- Publication number
- JPH0330309A JPH0330309A JP16507189A JP16507189A JPH0330309A JP H0330309 A JPH0330309 A JP H0330309A JP 16507189 A JP16507189 A JP 16507189A JP 16507189 A JP16507189 A JP 16507189A JP H0330309 A JPH0330309 A JP H0330309A
- Authority
- JP
- Japan
- Prior art keywords
- depolarization
- treatment
- formation
- aluminum foil
- tank
- 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.)
- Pending
Links
- 239000011888 foil Substances 0.000 title claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 title claims description 9
- 230000028161 membrane depolarization Effects 0.000 claims abstract description 42
- 238000011282 treatment Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims description 45
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 150000003839 salts Chemical class 0.000 claims description 8
- 239000007789 gas Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 abstract 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 24
- 239000007864 aqueous solution Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
- 239000004327 boric acid Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- GJYJYFHBOBUTBY-UHFFFAOYSA-N alpha-camphorene Chemical compound CC(C)=CCCC(=C)C1CCC(CCC=C(C)C)=CC1 GJYJYFHBOBUTBY-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- TVZISJTYELEYPI-UHFFFAOYSA-N hypodiphosphoric acid Chemical compound OP(O)(=O)P(O)(O)=O TVZISJTYELEYPI-UHFFFAOYSA-N 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241001062872 Cleyera japonica Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002999 depolarising effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
この発明は電解コンデンサ用アルミニウム箔の化成方法
に関し、さらに詳しく・言えば、同アルミニウム箔に異
なる化成電圧を印加して化成を行なうようにした多段化
成方法に関するものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a method for forming aluminum foil for electrolytic capacitors, and more specifically, the present invention relates to a method for forming aluminum foil for electrolytic capacitors. This invention relates to a multi-stage chemical conversion method.
一般に、アルミニウム電解コンデンサの陽極は、電極用
アルミニウム箔をエツチングした後に、陽ｔｒＪＡ酸化
することにより製造される。高圧用の陽極箔をｖ５造す
るにあたって、従来ではまず第１段化成槽内で例えば２
００■の化成電圧を印加し、次に第２段化成槽内に移し
て３００Ｖ電圧下で化成し、さらに第３段化成槽で３７
０■化成を行なった後、順に減極処理、熱処理、再化成
などの工程を経るようにしている。Generally, the anode of an aluminum electrolytic capacitor is manufactured by etching an aluminum foil for an electrode and then performing positive trJA oxidation. Conventionally, when producing V5 anode foil for high pressure, for example, 2
A chemical formation voltage of 00V is applied, then transferred to the second stage chemical conversion tank and chemically formed under a voltage of 300V, and then 37V in the third stage chemical conversion tank.
0) After chemical formation, steps such as depolarization treatment, heat treatment, and re-formation are performed in order.
上記のように多段階に化成を行なっているが、従来法に
よる限り、化成箔の漏れ電流を満足する値にまで低下さ
せることは困難であった。Although chemical conversion is performed in multiple stages as described above, it has been difficult to reduce the leakage current of the chemically formed foil to a satisfactory value using conventional methods.
本発明者は、この点を解決すべく鋭意研究を行なった結
果、この発明をなすに至った。The present inventor conducted extensive research to solve this problem, and as a result, he came up with this invention.
〔０！題を解決するための手段〕
上記課題を解決するため、この発明においては、電解コ
ンデンサ用アルミニウム箔に異なる化成電圧を多段階に
印加して同アルミニウム箔を化成するにあたって、少な
くとも各化成段階の間に、次損りん酸およびその塩を用
いて所定時間の減極処理を行ない、最終化成後に熱処理
を行ない、さらに次１にりん酸およびその塩を用いて減
極処理した後に再化成を行なうようにしている。[0! Means for Solving the Problems] In order to solve the above problems, in the present invention, when applying different forming voltages to an aluminum foil for electrolytic capacitors in multiple stages to chemically form the aluminum foil, at least during each forming stage, First, depolarization treatment is performed for a predetermined time using phosphoric acid and its salt, heat treatment is performed after final chemical formation, and then re-formation is performed after depolarization treatment is performed using phosphoric acid and its salt. I have to.
第１図には化成を３段階に行なう場合の例が示されてい
るが、これについて説明すると、アルミニウム箔１は、
図示しない前処理工程において所要の純水煮沸処理を施
されたのち、まず工８への第一次化成槽２内で例えば電
圧２００■を印加されて第一次化成される。次に、工程
Ｂの減極槽３内において減極処理がなされ、続いて工８
Ｃの第一次化成液４に移され、第二次化成（印加電圧３
００Ｖ）が行なわれる。その後、工Ｖ４Ｄの減極槽５内
で減極処理が行なわれ、工程Ｅの第三次化成槽６（印加
電圧３７０Ｖ）に移行する０ベニ８Ｘ−′の加熱室７に
よる熱処理が行なわれ、引き続き減極槽８内で減極処理
Ｇが行なわれ、さらに再化成槽９における再化成工程Ｈ
１後処理槽１ａ内での後処理工程工が行なわれる。FIG. 1 shows an example in which chemical conversion is carried out in three stages. To explain this, the aluminum foil 1 is
After being subjected to a necessary pure water boiling treatment in a pretreatment step (not shown), a voltage of, for example, 200 cm is applied in the primary chemical conversion tank 2 to step 8 to perform primary chemical conversion. Next, depolarization treatment is performed in the depolarization tank 3 of step B, and then step 8
It is transferred to the primary chemical liquid 4 of C, and the secondary chemical liquid (applied voltage 3
00V) is performed. After that, depolarization treatment is performed in the depolarization tank 5 of process V4D, and heat treatment is performed in the heating chamber 7 of 0V 8X-', which is transferred to the tertiary chemical conversion tank 6 (applied voltage 370V) of process E. Subsequently, depolarization treatment G is performed in the depolarization tank 8, and then a reconstitution process H is performed in the reconstitution tank 9.
A post-processing process is performed in the post-processing tank 1a.
この発明において、上記各減極処理工程Ｂ、Ｄ。In this invention, each of the above depolarization treatment steps B and D.
Ｇの減極処理液には次、１１Ｌりん看およびその塩が用
いられる。各減極処理液は同一の処理液であっても、ま
た配合成分などの異なる処理液であってもよい。減極処
理の時間としては１〜３０分間が好ましい。Next, 11L phosphorus and its salts are used in the depolarization treatment solution of G. Each depolarization treatment liquid may be the same treatment liquid, or may be a treatment liquid with different ingredients. The time for the depolarization treatment is preferably 1 to 30 minutes.
十、記の各化成槽２，４．６および９１こ対応して第一
次、第二次および第三次化成用電源１１．１２゜１３が
それぞれ用意され、アルミニウム箔１はそれら電源の（
＋）側に接続され、各化成槽内にはそれに対応する各電
源の（−）側に接続されるマイナス電極が配置されてい
る。図示の例において、再化成槽９は第三次化成槽６と
同じく第三次代成用′屯源１３に接続されている。第一
次化成液、第二次化成液、第三次化成液および再化成液
は同一の化成液であっても、またその他の異なる化成液
であってもよい。10. Primary, secondary, and tertiary chemical conversion power supplies 11, 12, and 13 are prepared corresponding to the chemical conversion tanks 2, 4, 6, and 91, respectively, and the aluminum foil 1 is connected to the (
A negative electrode is connected to the (+) side, and a negative electrode connected to the (-) side of the corresponding power source is arranged in each chemical conversion tank. In the illustrated example, the reconversion tank 9 is connected to the tertiary conversion source 13 like the tertiary conversion tank 6. The primary chemical liquid, the secondary chemical liquid, the tertiary chemical liquid, and the regenerated chemical liquid may be the same chemical liquid or may be other different chemical liquids.
熱処理は４００〜５５０℃の大気中、Ｎ２ガスもしくは
Ａｒガスなどの不活性ガス中で行なうのが好ましく、４
００℃未満であるとアルミニウム箔中の水分が十分に脱
水できず、また５５０℃を越えるとアルミニウム箔が溶
解し好ましくない、熱処理時間は数十秒から数七分が好
ましく、１〜１５分間がより好ましい。The heat treatment is preferably carried out in the atmosphere at 400 to 550°C, or in an inert gas such as N2 gas or Ar gas.
If the temperature is less than 00°C, the water in the aluminum foil cannot be sufficiently dehydrated, and if it exceeds 550°C, the aluminum foil will melt, which is undesirable.The heat treatment time is preferably from several tens of seconds to several seven minutes, and from 1 to 15 minutes. More preferred.
上記のように、多段化成を行なうにあたって、化成電圧
をステップアップさせるごとに、次曲りん酸およびその
塩を用いて減極処理を行ない、最終化成後に熱処理を行
ない、さらに次叱りん酸およびその塩を用いて減極処理
し５再化成を行なうことしこより、化成箔の漏れ電流を
小さくすることができる。As mentioned above, in performing multi-stage chemical formation, each time the formation voltage is stepped up, depolarization treatment is performed using hypophosphoric acid and its salts, heat treatment is performed after the final chemical formation, and further heat treatment is performed using hypophosphoric acid and its salts. The leakage current of the chemically formed foil can be reduced by performing depolarization treatment using salt and reconforming.
以−ト、この発明の実施例を比較例とともに説明する。 Examples of the present invention will now be described along with comparative examples.
なお、各実施例、比較例ともに化或は第三次まで行なっ
ている。It should be noted that each of the Examples and Comparative Examples has been carried out up to the third stage.
（実施例１）各化成槽２，４．６および９内に化成液と
して、硼酸濃度１７％水溶液を入れた。また、各減極榊
３，５，８内には、次亜りん酸濃度１．５％水溶液（液
温７５℃）を減損処理液として入れた。(Example 1) An aqueous solution of boric acid having a concentration of 17% was placed in each of the chemical conversion tanks 2, 4, 6 and 9 as a chemical conversion liquid. In addition, an aqueous solution of hypophosphorous acid having a concentration of 1.5% (liquid temperature: 75° C.) was placed in each of the depolarizing sakakis 3, 5, and 8 as a depletion treatment liquid.
工程彊】−次化成槽２において、１０ｍＡ／ ｃｒＪの
定電流にて２００ｖまで電圧を［−げ、この化成電圧を
定電圧状態にて１０分間印加した。[Process] - Next, in the chemical conversion tank 2, a voltage was applied to 200 V at a constant current of 10 mA/crJ, and this chemical forming voltage was applied for 10 minutes in a constant voltage state.
Ｅに程Ｂ；減極槽３の減極処理液内に８分間浸漬した。B: The sample was immersed in the depolarization solution in the depolarization tank 3 for 8 minutes.
工程Ｃ；第二次化成槽４において、ｌＯｍＡ／−の定電
流にて３００■まで電圧を」―げ、この化成電圧を定電
圧状層にて１０分間印カミ１シた。Step C: In the second chemical conversion tank 4, a voltage of 300 μm was applied at a constant current of 10 mA/−, and this chemical conversion voltage was applied for 10 minutes using a constant voltage layer.
工程Ｄ；減極槽５の減極処理液内に上記工程１３と同じ
く８分間浸漬した。Step D: It was immersed in the depolarization treatment liquid in the depolarization tank 5 for 8 minutes in the same manner as in step 13 above.
工程Ｅ；第三次化成槽６において、１０＋＋＋Ａ／−の
定電流にて３７０■まで電圧を１−げ、この化成゛電圧
を定電圧状態にて１０分間印加した。Step E: In the tertiary chemical conversion tank 6, the voltage was increased to 370 .mu.m with a constant current of 10 +++ A/-, and this chemical formation voltage was applied for 10 minutes in a constant voltage state.
工程ｌ・゛：加熱室７内で５００℃、２分間の熱処理を
行なった。Step 1・゛: Heat treatment was performed in the heating chamber 7 at 500° C. for 2 minutes.
工程Ｇ；滅極槽８の減極処理液内に十、記工程Ｂおよび
工程りと同じく８分間浸漬した。Step G: It was immersed in the depolarization treatment solution in the depolarization tank 8 for 8 minutes in the same manner as in step B and step 1 above.
工８Ｈ１再化成槽９内において、−上記第三次化成と同
じ＜ １０ｍＡ／−の定電流にて３７０■まで電圧を１
−げ、この化成電圧を定電圧状態にて１３分間印加した
。In the reconversion tank 9 of 8H1, the voltage was increased to 370μ at a constant current of <10mA/-, which is the same as the tertiary reconstitution described above.
-, and this chemical formation voltage was applied for 13 minutes in a constant voltage state.
工程１；後処理槽１０内において、リン蹟′ａ度２．５
％水溶液中に４分間浸漬した。Step 1: In the after-treatment tank 10, the phosphorus a degree is 2.5
% aqueous solution for 4 minutes.
〔評価〕上記の各処理を終えたアルミニウム箔を陽極と
し、他方のアルミニウム箔の陰極とをセパレータを介し
て巻回し、このコンデンサ素子にエチレングリコールを
主溶媒としたＳＲ解散を含浸させて、定格２００Ｖ、３
０μＦの電解コンデンサを製造したところ、その漏れ電
流は３．５．Ａ（１分値）であった。[Evaluation] The aluminum foil that has undergone the above treatments is used as an anode, and the other aluminum foil is wound as a cathode with a separator interposed between them. This capacitor element is impregnated with SR solution containing ethylene glycol as the main solvent, and the rated 200V, 3
When a 0μF electrolytic capacitor was manufactured, its leakage current was 3.5. It was A (1 minute value).
（実施例２）各化成槽２．４，６および９内の化成液は
、上記実施例１と同じｍはａ度１７％水溶液とした。こ
れに対して、各減極槽３，５．８内の減極処理液には、
次亜りん酸アンモニウム２％水溶液を使用した。(Example 2) The chemical conversion liquid in each of the chemical conversion tanks 2.4, 6 and 9 was an aqueous solution with a degree of a of 17%, the same as in Example 1 above. On the other hand, the depolarization treatment liquid in each depolarization tank 3, 5.8 has
A 2% aqueous solution of ammonium hypophosphite was used.
工程Ａ；上記実施例１と同じ。Step A: Same as in Example 1 above.
工程Ｂ；減極槽３の減極処理液、すなわち次亜りん酸ア
ンモニウム２％水溶液内に８分間浸漬した。Step B: It was immersed in the depolarization treatment liquid in the depolarization tank 3, that is, a 2% ammonium hypophosphite aqueous solution for 8 minutes.
工程Ｃ；上記実施例１と同じ。Step C: Same as in Example 1 above.
工程Ｄ；減極槽５の減極処理液内に上記工程Ｂと同じく
８分間浸漬した。Step D: It was immersed in the depolarization treatment liquid in the depolarization tank 5 for 8 minutes in the same manner as in the above step B.
工程Ｅ；上記実施例１と同じ。Step E: Same as in Example 1 above.
［〕〕程Ｉパ：−ヒ記実施例と同じ。[]] Step I: - Same as Example 1.
］−程Ｇ；減極槽８の減極処理液内に１−記］、程Ｂお
よび工ＰＡＬ）と同じく８分間浸漬した。]-Step G: The sample was immersed in the depolarization treatment solution in the depolarization tank 8 for 8 minutes in the same manner as in Steps 1-], B, and PAL).
工程Ｈ； Ｉ−記″Ａ施例１と同じ。Step H: Same as Example 1 in Section I-A.
工程工；−４―記′、Ａ施例１と同じ。Process: -4-Note', A Same as Example 1.
〔評価〕上記実施例１と同様の製品を製造したところ、
その漏れ電流は３．３μＡ（１分値）であった。[Evaluation] When a product similar to that of Example 1 was manufactured,
The leakage current was 3.3 μA (1 minute value).
（実施例３）各化成Ｍ２，４．６および９内の化成液は
、上記実施例１と同じ（−酸濃度１７％、水浴液を使用
した。また、各減極槽３，５．８内には。(Example 3) The chemical solution in each chemical conversion tank M2, 4.6 and 9 was the same as in Example 1 above (-acid concentration 17%, water bath liquid was used. Also, each depolarization tank 3, 5.8 Inside.
次亜りん酸すＩ〜リウム２％水溶液を滅極処６＋Ｉ！液
として入れた。Hypophosphorous acid I ~ 2% aqueous solution of lithium is depolarized 6 + I! I put it in as a liquid.
ｒ、程Ａ：上記実施例１と同じ。r, Step A: Same as in Example 1 above.
工程Ｂ；減極槽３の減極処理液内に８分間浸漬した。Step B: It was immersed in the depolarization treatment liquid in the depolarization tank 3 for 8 minutes.
工程Ｃ；上記実施例１と同じ。Step C: Same as in Example 1 above.
工程Ｄ；減極槽５の減極処理液内に８分間浸漬した。Step D: It was immersed in the depolarization treatment liquid in the depolarization tank 5 for 8 minutes.
工程Ｅ：上記実施例１と同じ。Step E: Same as Example 1 above.
工程エバ；減極槽８の減極処理液内に上記工程Ｂおよび
工程りと同じく８分間浸漬した。Step Eva: It was immersed in the depolarization treatment liquid in the depolarization tank 8 for 8 minutes in the same manner as in the above steps B and 2.
］−程Ｇ；上記実施例１の工程Ｆと同じ。]-Step G: Same as Step F of Example 1 above.
工程ＦＩ；上記実施例１と同じ。Step FI: Same as in Example 1 above.
工程Ｉ；上記実施例１と同じ。Step I: Same as Example 1 above.
Ｃ評イー１〕上記実施例１と同様の製品を製造したとこ
ろ、その漏れ電流は３．５μＡ（１分値）であった。C rating: E1] When a product similar to that of Example 1 was manufactured, its leakage current was 3.5 μA (1 minute value).
く比較例１〉各化成槽２，４，６および９内の化成液は
、上記実施例１と同じ硼酸濃度１７％水溶液を使用した
。また、各減極槽３，５．８内にはりんｆｖＩ′ａ度１
％水溶液を使用した。Comparative Example 1> As the chemical conversion liquid in each of the chemical conversion tanks 2, 4, 6, and 9, the same aqueous solution of boric acid with a concentration of 17% as in Example 1 was used. In addition, each depolarization tank 3, 5.8 contains phosphorus fvI'a degree 1
% aqueous solution was used.
工程Ａ；上記実施例１と同じ。Step A: Same as in Example 1 above.
］ＳＢ；減極槽３内の減極処理液内に８分間浸漬した。]SB: Immersed in the depolarization treatment solution in the depolarization tank 3 for 8 minutes.
工８Ｃ；上記実施例１と同じ。Step 8C: Same as Example 1 above.
工程Ｌ）を減極槽５内の減極処理液内に上記］−程Ｂと
同じく８分間浸漬した。Step L) was immersed in the depolarization treatment solution in the depolarization tank 5 for 8 minutes in the same manner as in Step B above.
工程Ｅ冨上記実施例１と同じ。Step E: Same as Example 1 above.
コー程Ｉパ；減極槽８内の減極処理液内に上記工程Ｂお
よび工程りと同じく８分間浸漬した。Step I: The sample was immersed in the depolarization treatment solution in the depolarization tank 8 for 8 minutes in the same manner as in Step B and Step 2 above.
工程Ｇ；上記実施例１の工程Ｆと同じ。Step G: Same as Step F of Example 1 above.
工程Ｃ；上記実施例１と同じ。Step C: Same as in Example 1 above.
工程Ｉ；上記実施例１と同じ。Step I: Same as Example 1 above.
〔評価〕上記実施例１と同様の製品を製造したところ、
その漏れ電流は４．０μＡ（１分値）であった。[Evaluation] When a product similar to that of Example 1 was manufactured,
The leakage current was 4.0 μA (1 minute value).
〈比較例２〉各化成槽２，４．６および９内の化成液は
、上記比較例１と同じ硼酸濃度１７％水溶液を使用した
。また、各減極処理槽３，５．８内にはアンモニア水（
Ｐ Ｈ７〜９）を使用した。<Comparative Example 2> As the chemical conversion liquid in each of the chemical conversion tanks 2, 4, 6, and 9, the same aqueous solution of boric acid having a concentration of 17% as in Comparative Example 1 was used. In addition, each depolarization treatment tank 3, 5.8 contains ammonia water (
PH7-9) was used.
工程Ａ；上記比較例１と同じ。Step A: Same as Comparative Example 1 above.
工程Ｂ；減極槽３の減極処理液内に８分間浸漬した。Step B: It was immersed in the depolarization treatment liquid in the depolarization tank 3 for 8 minutes.
工程Ｃ：上記比較例１と同じ。Step C: Same as Comparative Example 1 above.
工１ｉ！ｉｉＤ；減極槽５の減極処理液内に上記工程Ｂ
と同じく８分間浸漬した。Engineering 1i! iiD: The above step B is added to the depolarization treatment liquid in the depolarization tank 5.
It was soaked for 8 minutes in the same way.
工程Ｅ；上記比較例１と同じ。Step E: Same as Comparative Example 1 above.
工程ド；減極槽８の減極処理液内に上記工程Ｂおよび上
記工程りと同じく８分間浸漬した。Step D: The sample was immersed in the depolarization treatment solution in the depolarization tank 8 for 8 minutes in the same manner as in the above steps B and 1.
工程Ｇ；上記比較例１の工程Ｉパと同じ。Step G: Same as Step I of Comparative Example 1 above.
工程Ｈ；上記比較例１と同じ。Step H: Same as Comparative Example 1 above.
工程工；上記比較例１と同じ。Process: Same as Comparative Example 1 above.
〔評価〕上記比較例１と同様の製品をＨ造したところ、
その漏れ電流は４，５．Ａ（１分値）であった。[Evaluation] When a product similar to that of Comparative Example 1 was manufactured,
The leakage current is 4.5. It was A (1 minute value).
上記各実施例から、この発明によれば、比較例に比べて
漏れ電流をより低く抑えこめることが確認された。From the above examples, it was confirmed that according to the present invention, leakage current can be suppressed to a lower level than in the comparative example.
第１図はこの発明による化成方法の一実施例に係る工程
図である。
１はアルミニウム箭、２．４，６．９は化成槽、３．５
．８は減極槽、７は加熱室である。FIG. 1 is a process diagram of an embodiment of the chemical conversion method according to the present invention. 1 is aluminum cage, 2.4, 6.9 is chemical conversion tank, 3.5
．． 8 is a depolarization tank, and 7 is a heating chamber.
Claims (1)
圧を多段階に印加して同アルミニウム箔を化成する化成
方法において、 少なくとも各化成段階の間に、次亜りん酸およびその塩
を用いて所定時間の減極処理を行ない、最終化成後に熱
処理を行ない、さらに次亜りん酸およびその塩を用いて
減極処理した後に再化成を行なうようにしたことを特徴
とする電解コンデンサ用アルミニウム箔の化成方法。(1) In a chemical conversion method in which aluminum foil for electrolytic capacitors is chemically converted by applying different chemical conversion voltages in multiple stages, hypophosphorous acid and its salts are used at least between each chemical conversion step for a predetermined period of time. A method for chemically forming aluminum foil for an electrolytic capacitor, characterized in that depolarization treatment is performed, heat treatment is performed after final chemical formation, further depolarization treatment is performed using hypophosphorous acid and its salt, and then re-forming is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16507189A JPH0330309A (en) | 1989-06-27 | 1989-06-27 | Formation of aluminum foil for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16507189A JPH0330309A (en) | 1989-06-27 | 1989-06-27 | Formation of aluminum foil for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0330309A true JPH0330309A (en) | 1991-02-08 |
Family
ID=15805319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16507189A Pending JPH0330309A (en) | 1989-06-27 | 1989-06-27 | Formation of aluminum foil for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0330309A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080246A (en) * | 2010-12-03 | 2011-06-01 | 浙江丰川电子科技有限公司 | Device for producing medium-high voltage electrode foil at high speed |
-
1989
- 1989-06-27 JP JP16507189A patent/JPH0330309A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080246A (en) * | 2010-12-03 | 2011-06-01 | 浙江丰川电子科技有限公司 | Device for producing medium-high voltage electrode foil at high speed |
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