JP3203666B2 - Manufacturing method of aluminum alloy foil for anode of electrolytic capacitor - Google Patents
Manufacturing method of aluminum alloy foil for anode of electrolytic capacitorInfo
- Publication number
- JP3203666B2 JP3203666B2 JP04252791A JP4252791A JP3203666B2 JP 3203666 B2 JP3203666 B2 JP 3203666B2 JP 04252791 A JP04252791 A JP 04252791A JP 4252791 A JP4252791 A JP 4252791A JP 3203666 B2 JP3203666 B2 JP 3203666B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- alloy foil
- temperature
- aluminum
- hot
- 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.)
- Expired - Fee Related
Links
- 239000011888 foil Substances 0.000 title claims description 106
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 96
- 239000003990 capacitor Substances 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000005096 rolling process Methods 0.000 claims description 83
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 50
- 229910052782 aluminium Inorganic materials 0.000 claims description 47
- 238000001816 cooling Methods 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000005204 segregation Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 22
- 238000000034 method Methods 0.000 description 19
- 238000005530 etching Methods 0.000 description 18
- 238000000137 annealing Methods 0.000 description 14
- 239000012535 impurity Substances 0.000 description 12
- 239000002244 precipitate Substances 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 102220253765 rs141230910 Human genes 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 235000006408 oxalic acid Nutrition 0.000 description 2
- FLDCSPABIQBYKP-UHFFFAOYSA-N 5-chloro-1,2-dimethylbenzimidazole Chemical compound ClC1=CC=C2N(C)C(C)=NC2=C1 FLDCSPABIQBYKP-UHFFFAOYSA-N 0.000 description 1
- 239000001741 Ammonium adipate Substances 0.000 description 1
- 235000019293 ammonium adipate Nutrition 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Metal Rolling (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、Al純度が比較的低いに
もかかわらず、高静電容量の電解コンデンサ用陽極箔を
得ることができる、アルミニウム合金箔の製造方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an aluminum alloy foil capable of obtaining an anode foil for an electrolytic capacitor having a high capacitance despite a relatively low Al purity.
【０００２】[0002]
【従来の技術】従来より、電解コンデンサ用陽極箔を得
るために用いるアルミニウム合金箔としては、三層電解
法或いは偏析法によって精製された、Al純度99.98％以
上のアルミニウム合金箔が使用されている。このよう
に、純度の高いアルミニウム合金箔を使用する理由は、
エッチングによりアルミニウム合金箔の表面積を拡大
し、得られる陽極箔の静電容量を高めるためである。即
ち、Al純度99.98％未満の純度の低いアルミニウム合金
箔を使用すると、表面に粗大な不純物が多数析出してお
り、エッチングによって過溶解が生じ、アルミニウム合
金箔の表面積を有効に拡大しえないのである。しかし、
純度の高いアルミニウム合金箔は、精製工程を経ている
ため、高価であるという欠点があった。2. Description of the Related Art Heretofore, as an aluminum alloy foil used for obtaining an anode foil for an electrolytic capacitor, an aluminum alloy foil having an Al purity of 99.98% or more purified by a three-layer electrolytic method or a segregation method has been used. . Thus, the reason for using high purity aluminum alloy foil is that
This is for increasing the surface area of the aluminum alloy foil by etching and increasing the capacitance of the obtained anode foil. In other words, when a low-purity aluminum alloy foil with an Al purity of less than 99.98% is used, a large number of coarse impurities are deposited on the surface, and overdissolution occurs due to etching, and the surface area of the aluminum alloy foil cannot be effectively expanded. is there. But,
A high-purity aluminum alloy foil has a drawback of being expensive because it has undergone a refining process.
【０００３】[0003]
【発明が解決しようとする課題】そこで、本発明者は、
純度の低い安価なアルミニウム合金箔をしながら、エッ
チング時に有効に表面積を拡大させ、高静電容量の陽極
箔を得ることを試みた。しかし、この試みは、一般的に
は成功しなかった。ところが、純度の低い安価な一次地
金と偏析地金とを配合し、ある特定の条件で均質化処理
及び熱間圧延して、不純物を良好に固溶させ、そして不
純物による粗大な且つ多数の析出物の発生を抑制するこ
とにより、安価な材料でエッチング特性の良いアルミニ
ウム合金箔が得られることを見出し、本発明に到達した
のである。Therefore, the present inventor has proposed:
While using inexpensive aluminum alloy foil with low purity, the surface area was effectively enlarged at the time of etching, and an attempt was made to obtain an anode foil having high capacitance. However, this attempt was not generally successful. However, low-purity inexpensive primary metal and segregated metal are blended, homogenized and hot-rolled under certain conditions to dissolve impurities well, and coarse and numerous impurities are formed. The present inventors have found that by suppressing the generation of precipitates, an aluminum alloy foil having good etching characteristics can be obtained with an inexpensive material, and have reached the present invention.
【０００４】[0004]
【課題を解決するための手段及び作用】即ち、本発明
は、一次電解地金と偏析地金とを適宜配合して、Al純度
99.93〜99.98％のアルミニウム鋳塊を得た後、該アルミ
ニウム鋳塊に温度600℃以上且つ時間３時間以上の条件
で均質化処理を施し、次いで開始温度500℃以上で且つ
終了温度400℃以上で熱間粗圧延を施すと共に該熱間粗
圧延の所要時間を６分以内とし、その後該熱間粗圧延終
了時の温度に対して20℃以内の温度を開始温度とし且つ
終了温度250℃以下で熱間仕上げ圧延を施すと共に該熱
間仕上げ圧延の所要時間を２分以内とし、得られたアル
ミニウム板を、該熱間仕上げ圧延終了後において30℃／
hr.以上の冷却速度で冷却し、その後冷間圧延を施すこ
とを特徴とする電解コンデンサ陽極用アルミニウム合金
箔の製造方法に関するものである。Means and Functions for Solving the Problems That is, according to the present invention, a primary electrolytic metal and a segregated metal are appropriately blended to obtain an Al purity.
After obtaining an aluminum ingot of 99.93 to 99.98%, the aluminum ingot is subjected to a homogenization treatment at a temperature of 600 ° C. or more and a time of 3 hours or more, and then at a starting temperature of 500 ° C. or more and an end temperature of 400 ° C. or more. The hot rough rolling is performed and the time required for the hot rough rolling is set to 6 minutes or less. Thereafter, the temperature within 20 ° C with respect to the temperature at the end of the hot rough rolling is set to the starting temperature and the end temperature is set to 250 ° C or less. The hot finish rolling is performed and the time required for the hot finish rolling is set to 2 minutes or less, and the obtained aluminum plate is cooled at 30 ° C. /
The present invention relates to a method for producing an aluminum alloy foil for an anode of an electrolytic capacitor, characterized by cooling at a cooling rate of at least hr.
【０００５】まず、本発明においては、アルミニウム鋳
塊を得るための材料として、一次電解地金と偏析地金と
を使用する。ここで、一次電解地金とは、未だ精製工程
を経ていない、電解法によって得られたアルミニウム地
金のことである。従って、この一次電解地金は、三層電
解法或いは偏析法等による精製工程を経たアルミニウム
地金に比べて、安価である。また、偏析地金とは、偏析
法によって精製されたアルミニウム地金のことである。
三層電解法によって精製されたアルミニウム地金を使用
せずに、偏析法によって精製されたアルミニウム地金を
使用する理由は、後者の精製法で得られたアルミニウム
地金の方が、前者の精製法で得られたアルミニウム地金
よりも安価なためである。First, in the present invention, a primary electrolytic metal and a segregated metal are used as materials for obtaining an aluminum ingot. Here, the primary electrolytic metal is an aluminum metal obtained by an electrolytic method, which has not been subjected to a refining process yet. Therefore, the primary electrolytic metal is less expensive than an aluminum metal that has been subjected to a refining process such as a three-layer electrolytic method or a segregation method. The segregated metal is an aluminum metal refined by a segregation method.
The reason for using the aluminum ingot refined by the segregation method instead of using the aluminum ingot refined by the three-layer electrolysis method is that the aluminum ingot obtained by the latter refining method is better than that of the former. This is because it is cheaper than the aluminum ingot obtained by the method.
【０００６】上記の一次電解地金と偏析地金とを混合し
て、アルミニウム鋳塊を得る。一次地金と偏析地金の配
合割合は、一次地金の不純物量が種々であるため、最終
的にAl純度99.93〜99.98％となるように、任意の割合で
配合される。一般的には、一次電解地金：偏析地金＝20
〜80重量％：80〜20重量％の割合で配合するのが、好ま
しい。一次電解地金の配合割合を20重量％未満にする
と、一次電解地金の量が少なすぎ、アルミニウム鋳塊を
安価に得ることが困難となる。また、一次電解地金の配
合割合が80重量％を超えると、Al純度が99.93％未満と
なりやすく、本発明方法を適用しても、不純物が析出し
やすくなり、粗大な且つ多数の析出物のため、エッチン
グ時に過溶解が生じやすくなる。[0006] The above-mentioned primary electrolytic metal and segregated metal are mixed to obtain an aluminum ingot. The mixing ratio of the primary metal and the segregated metal is mixed at an arbitrary ratio so that the Al purity finally becomes 99.93 to 99.98% because the amount of impurities in the primary metal varies. Generally, primary electrolytic metal: segregated metal = 20
8080% by weight: It is preferable to mix at a ratio of 80 to 20% by weight. If the mixing ratio of the primary electrolytic metal is less than 20% by weight, the amount of the primary electrolytic metal is too small, and it is difficult to obtain an aluminum ingot at low cost. Further, when the blending ratio of the primary electrolytic metal exceeds 80% by weight, the Al purity tends to be less than 99.93%, and even when the method of the present invention is applied, impurities are easily precipitated, and coarse and numerous precipitates are formed. Therefore, overdissolution is likely to occur during etching.
【０００７】このアルミニウム鋳塊に、温度600℃以上
且つ時間３時間以上の条件で均質化処理を施す。均質化
処理の温度を600℃未満にしたり又は均質化処理の時間
を３時間未満にすると、アルミニウム鋳塊中の不純物が
十分に固溶せず、不純物が析出しやすくなり、粗大な且
つ多数の析出物のため、陽極箔作成時のエッチング工程
において過溶解が生じ、アルミニウム合金箔の表面積を
十分に拡大しえないので、好ましくない。特に、均質化
処理の温度条件は、620℃〜630℃程度が好ましい。均質
化処理の温度が630℃を超えると、アルミニウム鋳塊が
柔らかくなり、その後の熱間圧延が困難になる傾向が生
じる。The aluminum ingot is subjected to a homogenization treatment at a temperature of 600 ° C. or more and a time of 3 hours or more. When the temperature of the homogenization treatment is set to less than 600 ° C. or the time of the homogenization treatment is set to less than 3 hours, the impurities in the aluminum ingot do not sufficiently form a solid solution, and the impurities are easily precipitated. Because of the precipitates, overdissolution occurs in the etching step when preparing the anode foil, and the surface area of the aluminum alloy foil cannot be sufficiently increased, which is not preferable. In particular, the temperature condition of the homogenization treatment is preferably about 620 ° C to 630 ° C. If the temperature of the homogenization treatment exceeds 630 ° C., the aluminum ingot tends to be soft and the subsequent hot rolling tends to be difficult.
【０００８】アルミニウム鋳塊に均質化処理を施した
後、熱間粗圧延を施す。熱間粗圧延の開始温度は、500
℃以上とする必要がある。また、熱間粗圧延の終了温度
は、400℃以上とする必要がある。開始温度を500℃未満
にしたり、或いは終了温度を400℃未満にすると、均質
化処理によって一旦固溶した不純物が析出する恐れがあ
り、得られるアルミニウム合金箔に粗大な且つ多数の析
出物が生じ、陽極箔作成時のエッチング工程において過
溶解が生じ、アルミニウム合金箔の表面積を十分に拡大
しえないので、好ましくない。また、熱間粗圧延の所要
時間、即ち熱間粗圧延工程の通過時間は、６分以内とす
る必要がある。熱間粗圧延を６分を超えて行なうと、そ
の間に、均質化処理によって一旦固溶した不純物が析出
する恐れが生じるので、好ましくない。After the aluminum ingot is subjected to the homogenization treatment, hot rough rolling is performed. The starting temperature of hot rough rolling is 500
It is necessary to be higher than ° C. Further, the end temperature of the hot rough rolling needs to be 400 ° C. or higher. If the starting temperature is less than 500 ° C or the ending temperature is less than 400 ° C, impurities once dissolved in the homogenization treatment may be precipitated, and coarse and many precipitates are formed on the obtained aluminum alloy foil. This is not preferable because overdissolution occurs in the etching step at the time of forming the anode foil and the surface area of the aluminum alloy foil cannot be sufficiently increased. Further, the time required for the hot rough rolling, that is, the passage time of the hot rough rolling step, needs to be within 6 minutes. If the hot rough rolling is carried out for more than 6 minutes, it is not preferable because impurities once solid-dissolved by the homogenization treatment may precipitate during that time.
【０００９】熱間粗圧延後に、熱間仕上げ圧延を施す。
熱間仕上げ圧延の開始温度は、熱間粗圧延終了時の温度
に対して20℃以内の温度とする必要がある。また、熱間
仕上げ圧延の終了温度は、250℃以下とする必要があ
る。熱間仕上げ圧延の開始温度が、熱間粗圧延終了時の
温度に対して20℃を超える温度（特に、熱間粗圧延終了
時の温度に対して20℃を超える低い温度）にしたり、或
いは熱間仕上げ圧延の終了温度が250℃を超える温度で
あると、均質化処理によって一旦固溶した不純物が析出
する恐れがあり、得られるアルミニウム合金箔に粗大な
且つ多数の析出物が生じ、陽極箔作成時のエッチング工
程において過溶解が生じ、アルミニウム合金箔の表面積
を十分に拡大しえないので、好ましくない。また、熱間
仕上げ圧延の所要時間、即ち熱間仕上げ圧延工程の通過
時間は、２分以内とする必要がある。熱間仕上げ圧延を
２分を超えて行なうと、その間に、均質化処理によって
一旦固溶した不純物が析出する恐れが生じるので、好ま
しくない。After the hot rough rolling, hot finish rolling is performed.
The start temperature of the hot finish rolling needs to be a temperature within 20 ° C. with respect to the temperature at the end of the hot rough rolling. Further, the end temperature of the hot finish rolling needs to be 250 ° C. or less. The start temperature of the hot finish rolling is a temperature exceeding 20 ° C. with respect to the temperature at the end of the hot rough rolling (particularly, a temperature exceeding 20 ° C. with respect to the temperature at the end of the hot rough rolling), or If the finish temperature of the hot finish rolling is higher than 250 ° C., there is a possibility that impurities once dissolved in solid solution may be precipitated by the homogenization treatment, and coarse and many precipitates are generated in the obtained aluminum alloy foil, and the anode It is not preferable because overdissolution occurs in the etching step at the time of forming the foil and the surface area of the aluminum alloy foil cannot be sufficiently increased. Further, the time required for the hot finish rolling, that is, the passing time of the hot finish rolling step, must be within 2 minutes. If the hot finish rolling is performed for more than 2 minutes, there is a possibility that impurities once dissolved in the solution by the homogenization treatment may be precipitated during that time, which is not preferable.
【００１０】熱間仕上げ圧延が終了して得られたアルミ
ニウム板は、熱間仕上げ圧延終了時の温度に加熱されて
いる。従って、このアルミニウム板を常温に冷却する必
要がある。この際、冷却速度を30℃／hr.以上とする必
要がある。冷却速度を30℃／hr.未満にすると、均質化
処理によって一旦固溶した不純物が析出する恐れがあ
り、得られるアルミニウム合金箔に粗大な且つ多数の析
出物が生じ、陽極箔作成時のエッチング工程において過
溶解が生じ、アルミニウム合金箔の表面積を十分に拡大
しえないので、好ましくない。[0010] The aluminum plate obtained after the hot finish rolling is heated to the temperature at the end of the hot finish rolling. Therefore, it is necessary to cool the aluminum plate to room temperature. At this time, the cooling rate needs to be 30 ° C./hr. Or more. If the cooling rate is lower than 30 ° C./hr., There is a risk that impurities once dissolved in solid solution may be precipitated by the homogenization treatment, and coarse and numerous precipitates are formed on the obtained aluminum alloy foil. This is not preferable because excessive melting occurs in the process and the surface area of the aluminum alloy foil cannot be sufficiently increased.
【００１１】以上の如き方法で得られた、常温のアルミ
ニウム板に冷間圧延を施して、アルミニウム合金箔とす
る。この冷間圧延は、従来公知の方法で行なうことがで
きる。冷間圧延を施した後、そのまま電解コンデンサ陽
極用アルミニウム合金箔としてもよいし、また冷間圧延
後に最終焼鈍を施して電解コンデンサ陽極用アルミニウ
ム合金箔としてもよい。最終焼鈍を施さない場合は、硬
質アルミニウム合金箔となり、最終焼鈍を施した場合
は、半硬質又は軟質アルミニウム合金箔となる。最終焼
鈍を施す場合は、温度200℃以上で時間１時間以上の条
件で施すのが好ましい。そして、この電解コンデンサ陽
極用アルミニウム合金箔に、公知の方法でエッチング処
理等を施して、電解コンデンサ陽極箔を得るのである。The aluminum plate at room temperature obtained by the above method is subjected to cold rolling to obtain an aluminum alloy foil. This cold rolling can be performed by a conventionally known method. After the cold rolling, the aluminum alloy foil for the anode of the electrolytic capacitor may be used as it is, or the aluminum alloy foil for the anode of the electrolytic capacitor may be subjected to final annealing after the cold rolling. If the final annealing is not performed, a hard aluminum alloy foil is obtained, and if the final annealing is performed, a semi-hard or soft aluminum alloy foil is obtained. When performing the final annealing, it is preferable to perform the annealing at a temperature of 200 ° C. or more for a time of 1 hour or more. Then, the aluminum alloy foil for the anode of the electrolytic capacitor is subjected to an etching treatment or the like by a known method to obtain an anode foil of the electrolytic capacitor.
【００１２】[0012]
【実施例】まず、一次電解地金と偏析地金とを表１に示
す割合で混合し、表１に示す成分割合のアルミニウム鋳
塊（厚さ400mm）５種を得た。EXAMPLES First, a primary electrolytic metal and a segregated metal were mixed at the ratios shown in Table 1 to obtain five types of aluminum ingots (400 mm thick) having the component ratios shown in Table 1.
【表１】 [Table 1]
【００１３】実施例１ 合金No１のアルミニウム鋳塊を用いて、均質化処理をし
た後、熱間粗圧延機で20mmに圧延し、次いで熱間仕上げ
圧延機で３mmの厚さのアルミニウム板を得、コイル状に
巻き上げた。そして、冷却を行なった後、冷間圧延を施
して、厚さ0.090mmのアルミニウム合金箔を得た。均質
化処理等の条件は、下記のとおりである。 記 均質化処理条件 ：600℃×３時間 熱間粗圧延開始温度 ：520℃ 熱間粗圧延終了温度 ：450℃ 熱間粗圧延所要時間（通過時間） ：５分 熱間仕上げ圧延開始温度 ：450℃ 熱間仕上げ圧延終了温度 ：230℃ 熱間仕上げ圧延所要時間（通過時間） ：２分 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：30℃／hr. 最終焼鈍 ：なし 以上のようにして得られた電解コンデンサ陽極用アルミ
ニウム合金箔に、以下に示す方法でエッチング前処理、
エッチング本処理、化成処理を施し、静電容量（μＦ／
cm2）を測定した。その結果、静電容量は44.2μＦ／cm2
であった。［エッチング前処理］液温85℃の12％塩酸＋
６％蓚酸の水溶液中に、アルミニウム合金箔を浸し、電
流密度：ＤＣ0.1Ａ／cm2で且つ時間１分の条件でエッチ
ング前処理を行なった。［エッチング本処理］液温30℃
の８％塩酸＋0.2％蓚酸の水溶液中に、エッチング前処
理後のアルミニウム合金箔を浸し、電流密度：50Hz矩形
波0.2Ａ／cm2で且つ時間９分の条件でエッチング本処理
を行なった。［化成処理］液温70℃のアジピン酸アンモ
ニウム150ｇ／ｌの水溶液中に、エッチング本処理後の
アルミニウム合金箔を浸し、電圧20Ｖで且つ時間10分の
条件で化成処理を行なった。［静電容量］化成処理を終
えたアルミニウム合金箔から、１cm×２cmの短冊片状試
料２枚を採取して、これを５％硼酸水溶液中に浸漬し、
120Hzの直列等価回路でＬＣＲメーターを使用して測定
した。Example 1 An aluminum ingot of alloy No. 1 was homogenized, then rolled to 20 mm by a hot rough rolling mill, and then an aluminum plate having a thickness of 3 mm was obtained by a hot finishing rolling mill. , Wound up in a coil. Then, after cooling, cold rolling was performed to obtain an aluminum alloy foil having a thickness of 0.090 mm. The conditions such as the homogenization treatment are as follows. Note: Homogenization treatment conditions: 600 ° C × 3 hours Hot rough rolling start temperature: 520 ° C Hot rough rolling end temperature: 450 ° C Hot rough rolling required time (passing time): 5 minutes Hot finish rolling start temperature: 450 ℃ Finish temperature of hot finish rolling: 230 ° C Time required for hot finish rolling (passing time): 2 minutes Cooling rate of aluminum plate after completion of hot finish rolling: 30 ° C / hr. Final annealing: none The obtained electrolytic capacitor anode aluminum alloy foil, pre-etching treatment by the method shown below,
After performing the main etching process and the chemical conversion process, the capacitance (μF /
cm 2) was measured. As a result, the capacitance was 44.2 μF / cm 2
Met. [Etching pretreatment] 12% hydrochloric acid at a liquid temperature of 85 ° C +
The aluminum alloy foil was immersed in an aqueous solution of 6% oxalic acid, and pre-etching treatment was performed under the conditions of a current density of DC 0.1 A / cm 2 and a time of 1 minute. [Etching main treatment] Liquid temperature 30 ° C
The aluminum alloy foil after the pre-etching treatment was immersed in an aqueous solution of 8% hydrochloric acid + 0.2% oxalic acid, and the main etching was performed under the conditions of a current density of 50 Hz, a rectangular wave of 0.2 A / cm 2 and a time of 9 minutes. . [Chemical conversion treatment] The aluminum alloy foil after the main etching treatment was immersed in an aqueous solution of ammonium adipate 150 g / l at a liquid temperature of 70 ° C, and a chemical conversion treatment was performed under the conditions of a voltage of 20 V and a time of 10 minutes. [Capacitance] Two 1 cm × 2 cm strip-shaped samples were collected from the aluminum alloy foil after the chemical conversion treatment, and immersed in a 5% boric acid aqueous solution.
The measurement was performed using an LCR meter in a 120 Hz series equivalent circuit.
【００１４】実施例２ 均質化処理条件を下記の条件とする以外は、実施例１と
同様の条件でアルミニウム合金箔を得た。このアルミニ
ウム合金箔を、実施例１と同様に処理して静電容量を測
定したところ、45.6μＦ／cm2であった。 記 均質化処理条件 ：620℃×３時間Example 2 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the homogenizing treatment conditions were as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 45.6 μF / cm 2 . Note: Homogenization treatment conditions: 620 ° C x 3 hours
【００１５】比較例１ 均質化処理条件を下記の条件とする以外は、実施例１と
同様の条件でアルミニウム合金箔を得た。このアルミニ
ウム合金箔を、実施例１と同様に処理して静電容量を測
定したところ、38.1μＦ／cm2であった。 記 均質化処理条件 ：560℃×６時間Comparative Example 1 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the homogenizing treatment conditions were as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 38.1 μF / cm 2 . Note Homogenization conditions: 560 ° C x 6 hours
【００１６】比較例２ 均質化処理条件を下記の条件とする以外は、実施例１と
同様の条件でアルミニウム合金箔を得た。このアルミニ
ウム合金箔を、実施例１と同様に処理して静電容量を測
定したところ、42.5μＦ／cm2であった。 記 均質化処理条件 ：600℃×１時間Comparative Example 2 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the homogenizing treatment conditions were as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 42.5 μF / cm 2 . Note Homogenization processing conditions: 600 ° C x 1 hour
【００１７】実施例３ 熱間粗圧延の開始温度を下記の条件とする以外は、実施
例１と同様の条件でアルミニウム合金箔を得た。このア
ルミニウム合金箔を、実施例１と同様に処理して静電容
量を測定したところ、43.9μＦ／cm2であった。 記 熱間粗圧延開始温度 ：500℃Example 3 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the starting temperature of the hot rough rolling was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 43.9 μF / cm 2 . Note Hot rough rolling start temperature: 500 ℃
【００１８】比較例３ 熱間粗圧延の開始温度を下記の条件とする以外は、実施
例１と同様の条件でアルミニウム合金箔を得た。このア
ルミニウム合金箔を、実施例１と同様に処理して静電容
量を測定したところ、42.1μＦ／cm2であった。 記 熱間粗圧延開始温度 ：480℃Comparative Example 3 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot rough rolling start temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 42.1 μF / cm 2 . Note Hot rough rolling start temperature: 480 ° C
【００１９】実施例４ 熱間粗圧延終了温度を下記の条件とする以外は、実施例
１と同様の条件でアルミニウム合金箔を得た。このアル
ミニウム合金箔を、実施例１と同様に処理して静電容量
を測定したところ、44.8μＦ／cm2であった。 記 熱間粗圧延終了温度 ：400℃Example 4 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot rough rolling end temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 44.8 μF / cm 2 . Note Hot rough rolling end temperature: 400 ℃
【００２０】比較例４ 熱間粗圧延終了温度を下記の条件とする以外は、実施例
１と同様の条件でアルミニウム合金箔を得た。このアル
ミニウム合金箔を、実施例１と同様に処理して静電容量
を測定したところ、42.9μＦ／cm2であった。 記 熱間粗圧延終了温度 ：350℃Comparative Example 4 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot rough rolling end temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 42.9 μF / cm 2 . Note Hot rough rolling end temperature: 350 ° C
【００２１】実施例５ 熱間粗圧延所要時間（通過時間）を下記の条件とする以
外は、実施例１と同様の条件でアルミニウム合金箔を得
た。このアルミニウム合金箔を、実施例１と同様に処理
して静電容量を測定したところ、44.7μＦ／cm2であっ
た。 記 熱間粗圧延所要時間（通過時間） ：６分Example 5 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the time required for hot rough rolling (passing time) was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 44.7 μF / cm 2 . Note Hot rough rolling required time (passing time): 6 minutes
【００２２】比較例５ 熱間粗圧延所要時間（通過時間）を下記の条件とする以
外は、実施例１と同様の条件でアルミニウム合金箔を得
た。このアルミニウム合金箔を、実施例１と同様に処理
して静電容量を測定したところ、40.5μＦ／cm2であっ
た。 記 熱間粗圧延所要時間（通過時間） ：10分Comparative Example 5 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the time required for hot rough rolling (passing time) was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 40.5 μF / cm 2 . Note Hot rough rolling required time (passing time): 10 minutes
【００２３】実施例６ 熱間仕上げ圧延開始温度を下記の条件とする以外は、実
施例１と同様の条件でアルミニウム合金箔を得た。この
アルミニウム合金箔を、実施例１と同様に処理して静電
容量を測定したところ、43.9μＦ／cm2であった。 記 熱間仕上げ圧延開始温度 ：430℃Example 6 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot finish rolling start temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 43.9 μF / cm 2 . Note Hot finish rolling start temperature: 430 ℃
【００２４】比較例６ 熱間仕上げ圧延開始温度を下記の条件とする以外は、実
施例１と同様の条件でアルミニウム合金箔を得た。この
アルミニウム合金箔を、実施例１と同様に処理して静電
容量を測定したところ、43.1μＦ／cm2であった。 記 熱間仕上げ圧延開始温度 ：400℃Comparative Example 6 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot finish rolling start temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 43.1 μF / cm 2 . Note Hot finish rolling start temperature: 400 ℃
【００２５】実施例７ 熱間仕上げ圧延終了温度を下記の条件とする以外は、実
施例１と同様の条件でアルミニウム合金箔を得た。この
アルミニウム合金箔を、実施例１と同様に処理して静電
容量を測定したところ、44.1μＦ／cm2であった。 記 熱間仕上げ圧延終了温度 ：250℃Example 7 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot finish rolling end temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 44.1 μF / cm 2 . Note Hot finish rolling finish temperature: 250 ° C
【００２６】比較例７ 熱間仕上げ圧延終了温度を下記の条件とする以外は、実
施例１と同様の条件でアルミニウム合金箔を得た。この
アルミニウム合金箔を、実施例１と同様に処理して静電
容量を測定したところ、40.2μＦ／cm2であった。 記 熱間仕上げ圧延終了温度 ：280℃Comparative Example 7 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the hot finish rolling end temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 40.2 μF / cm 2 . Note Hot finish rolling end temperature: 280 ℃
【００２７】比較例８ 熱間仕上げ圧延所要時間（通過時間）を下記の条件とす
る以外は、実施例１と同様の条件でアルミニウム合金箔
を得た。このアルミニウム合金箔を、実施例１と同様に
処理して静電容量を測定したところ、39.5μＦ／cm2で
あった。 記 熱間仕上げ圧延所要時間（通過時間） ：８分Comparative Example 8 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the required time for hot finish rolling (passing time) was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1, and the capacitance was measured. As a result, it was 39.5 μF / cm 2 . Note Hot finish rolling required time (passing time): 8 minutes
【００２８】比較例９ 熱間仕上げ圧延所要時間（通過時間）を下記の条件とす
る以外は、実施例１と同様の条件でアルミニウム合金箔
を得た。このアルミニウム合金箔を、実施例１と同様に
処理して静電容量を測定したところ、36.7μＦ／cm2で
あった。 記 熱間仕上げ圧延所要時間（通過時間） ：15分Comparative Example 9 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the required time for hot finish rolling (passing time) was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 36.7 μF / cm 2 . Note Hot finish rolling required time (passing time): 15 minutes
【００２９】実施例８ 熱間仕上げ圧延終了後のアルミニウム板の冷却速度を下
記の条件とする以外は、実施例１と同様の条件でアルミ
ニウム合金箔を得た。このアルミニウム合金箔を、実施
例１と同様に処理して静電容量を測定したところ、45.3
μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：50℃／hr.Example 8 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the cooling rate of the aluminum plate after the completion of the hot finish rolling was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured.
μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 50 ° C / hr.
【００３０】比較例10 熱間仕上げ圧延終了後のアルミニウム板の冷却速度及び
最終焼鈍を下記の条件とする以外は、実施例１と同様の
条件でアルミニウム合金箔を得た。このアルミニウム合
金箔を、実施例１と同様に処理して静電容量を測定した
ところ、42.3μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：10℃／hr. 最終焼鈍 ：350℃×10時間Comparative Example 10 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the cooling rate and final annealing of the aluminum plate after the hot finish rolling were set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 42.3 μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 10 ° C / hr. Final annealing: 350 ° C x 10 hours
【００３１】比較例11 熱間仕上げ圧延終了後のアルミニウム板の冷却速度及び
最終焼鈍を下記の条件とする以外は、実施例１と同様の
条件でアルミニウム合金箔を得た。このアルミニウム合
金箔を、実施例１と同様に処理して静電容量を測定した
ところ、41.9μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：10℃／hr. 最終焼鈍 ：330℃×15時間Comparative Example 11 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the cooling rate and final annealing of the aluminum plate after the hot finish rolling were set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 41.9 μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 10 ° C / hr. Final annealing: 330 ° C x 15 hours
【００３２】比較例12 熱間仕上げ圧延終了後のアルミニウム板の冷却速度及び
最終焼鈍を下記の条件とする以外は、実施例１と同様の
条件でアルミニウム合金箔を得た。このアルミニウム合
金箔を、実施例１と同様に処理して静電容量を測定した
ところ、40.8μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：10℃／hr. 最終焼鈍 ：250℃×20時間Comparative Example 12 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the cooling rate and final annealing of the aluminum plate after the hot finish rolling were set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 40.8 μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 10 ° C / hr. Final annealing: 250 ° C x 20 hours
【００３３】比較例13 熱間仕上げ圧延終了後のアルミニウム板の冷却速度及び
最終焼鈍を下記の条件とする以外は、実施例１と同様の
条件でアルミニウム合金箔を得た。このアルミニウム合
金箔を、実施例１と同様に処理して静電容量を測定した
ところ、41.6μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：10℃／hr. 最終焼鈍 ：200℃×20時間Comparative Example 13 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that the cooling rate and final annealing of the aluminum plate after the hot finish rolling were set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 41.6 μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 10 ° C / hr. Final annealing: 200 ° C x 20 hours
【００３４】実施例９ 合金Ｎｏ２のアルミニウム鋳塊を用いる以外は、実施例
１と同様の条件でアルミニウム合金箔を得た。このアル
ミニウム合金箔を、実施例１と同様に処理して静電容量
を測定したところ、４３．６μＦ／ｃｍ2であった。Example 9 An aluminum alloy foil was obtained under the same conditions as in Example 1 except that an aluminum ingot of alloy No. 2 was used. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 43.6 μF / cm 2 .
【００３５】実施例10 均質化処理を下記の条件とする以外は、実施例９と同様
の条件でアルミニウム合金箔を得た。このアルミニウム
合金箔を、実施例１と同様に処理して静電容量を測定し
たところ、44.5μＦ／cm2であった。 記 均質化処理条件 ：620℃×３時間Example 10 An aluminum alloy foil was obtained under the same conditions as in Example 9 except that the homogenization treatment was performed under the following conditions. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 44.5 μF / cm 2 . Note: Homogenization treatment conditions: 620 ° C x 3 hours
【００３６】 実施例11 熱間仕上げ圧延終了後のアルミニウム板の冷却速度を下
記の条件とする以外は、実施例10と同様の条件でアルミ
ニウム合金箔を得た。このアルミニウム合金箔を、実施
例１と同様に処理して静電容量を測定したところ、45.2
μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：50℃／hr.Example 11 An aluminum alloy foil was obtained under the same conditions as in Example 10, except that the cooling rate of the aluminum plate after completion of the hot finish rolling was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured.
μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 50 ° C / hr.
【００３７】実施例12 合金No３のアルミニウム鋳塊を用いる点、及び熱間仕上
げ圧延終了後のアルミニウム板の冷却速度を下記の条件
とする以外は、実施例１と同様の条件でアルミニウム合
金箔を得た。このアルミニウム合金箔を、実施例１と同
様に処理して静電容量を測定したところ、42.2μＦ／cm
2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：50℃／hr.Example 12 An aluminum alloy foil was prepared under the same conditions as in Example 1 except that the aluminum ingot of alloy No. 3 was used and the cooling rate of the aluminum plate after the hot finish rolling was set to the following conditions. Obtained. When this aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured, it was found to be 42.2 μF / cm.
Was 2 . Note Cooling rate of aluminum plate after hot finish rolling: 50 ° C / hr.
【００３８】実施例13 均質化処理を下記の条件とする以外は、実施例12と同様
の条件でアルミニウム合金箔を得た。このアルミニウム
合金箔、実施例１と同様に処理して静電容量を測定した
ところ、43.4μＦ／cm2であった。 記 均質化処理条件 ：620℃×３時間Example 13 An aluminum alloy foil was obtained under the same conditions as in Example 12, except that the homogenization treatment was performed under the following conditions. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 43.4 μF / cm 2 . Note: Homogenization treatment conditions: 620 ° C x 3 hours
【００３９】実施例14 熱間仕上げ圧延終了後のアルミニウム板の冷却速度を下
記の条件とする以外は、実施例13と同様の条件でアルミ
ニウム合金箔を得た。このアルミニウム合金箔を、実施
例１と同様に処理して静電容量を測定したところ、42.1
μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：30℃／hr.Example 14 An aluminum alloy foil was obtained under the same conditions as in Example 13 except that the cooling rate of the aluminum plate after the hot finish rolling was set under the following conditions. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured.
μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 30 ° C / hr.
【００４０】比較例14 合金No４のアルミニウム鋳塊を用いる以外は、実施例１
と同様の条件でアルミニウム合金箔を得た。このアルミ
ニウム合金箔を、実施例１と同様に処理して静電容量を
測定したところ、43.0μＦ／cm2であった。Comparative Example 14 Example 1 was repeated except that an aluminum ingot of alloy No. 4 was used.
Under the same conditions as above, an aluminum alloy foil was obtained. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 43.0 μF / cm 2 .
【００４１】比較例15 熱間仕上げ圧延終了後のアルミニウム板の冷却速度を下
記の条件とする以外は、比較例14と同様の条件でアルミ
ニウム合金箔を得た。このアルミニウム合金箔を、実施
例１と同様に処理して静電容量を測定したところ、44.1
μＦ／cm2であった。 記 熱間仕上げ圧延終了後のアルミニウム板の冷却速度：50℃／hr.Comparative Example 15 An aluminum alloy foil was obtained under the same conditions as in Comparative Example 14, except that the cooling rate of the aluminum plate after the completion of the hot finish rolling was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured.
μF / cm 2 . Note Cooling rate of aluminum plate after hot finish rolling: 50 ° C / hr.
【００４２】比較例16 合金No５のアルミニウム鋳塊を用いる以外は、実施例１
と同様の条件でアルミニウム合金箔を得た。このアルミ
ニウム合金箔を、実施例１と同様に処理して静電容量を
測定したところ、38.9μＦ／cm2であった。Comparative Example 16 Example 1 was repeated except that an aluminum ingot of alloy No. 5 was used.
Under the same conditions as above, an aluminum alloy foil was obtained. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 38.9 μF / cm 2 .
【００４３】比較例17 均質化処理を下記の条件とする以外は、比較例16と同様
の条件でアルミニウム合金箔を得た。このアルミニウム
合金箔を、実施例１と同様に処理して静電容量を測定し
たところ、40.5μＦ／cm2であった。 記 均質化処理条件 ：620℃×３時間Comparative Example 17 An aluminum alloy foil was obtained under the same conditions as in Comparative Example 16 except that the homogenization treatment was performed under the following conditions. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 40.5 μF / cm 2 . Note: Homogenization treatment conditions: 620 ° C x 3 hours
【００４４】比較例18 熱間仕上げ圧延終了温度を下記の条件とする以外は、比
較例16と同様の条件でアルミニウム合金箔を得た。この
アルミニウム合金箔を、実施例１と同様に処理して静電
容量を測定したところ、39.3μＦ／cm2であった。 記 熱間仕上げ圧延終了温度 ：250℃Comparative Example 18 An aluminum alloy foil was obtained under the same conditions as in Comparative Example 16 except that the hot finish rolling end temperature was set as follows. This aluminum alloy foil was treated in the same manner as in Example 1 and the capacitance was measured. As a result, it was 39.3 μF / cm 2 . Note Hot finish rolling finish temperature: 250 ° C
【００４５】[0045]
【発明の効果】以上実施例及び比較例によって実証した
とおり、本発明に係る方法で得られたアルミニウム合金
箔をエッチング処理して電解コンデンサ用陽極箔とした
場合、Al純度が99.98％未満であるにも拘らず、Al純度9
9.98％以上のものを用いた場合と同等の静電容量が得ら
れる。即ち、本発明に係る方法を採用すれば、Al純度が
低いアルミニウム鋳塊を使用しながら、Al純度が高いア
ルミニウム鋳塊を使用した場合と同等のエッチング特性
を持つアルミニウム合金箔が得られるのである。従っ
て、本発明方法を採用すれば、安価な材料で従来と同様
の特性を持つものが得られ、電解コンデンサ用陽極箔を
安価に提供しうるという効果を奏するものである。As demonstrated by the above examples and comparative examples, when the aluminum alloy foil obtained by the method according to the present invention is etched to form an anode foil for an electrolytic capacitor, the Al purity is less than 99.98%. Nevertheless, Al purity 9
Capacitance equivalent to that when 9.98% or more is used is obtained. That is, if the method according to the present invention is employed, while using an aluminum ingot having a low Al purity, an aluminum alloy foil having the same etching characteristics as when using an aluminum ingot having a high Al purity can be obtained. . Therefore, if the method of the present invention is adopted, an inexpensive material having the same characteristics as the conventional one can be obtained, and the effect that the anode foil for an electrolytic capacitor can be provided at a low cost can be obtained.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ２２Ｆ 1/00 ６８３ Ｃ２２Ｆ 1/00 ６８３ ６９１ ６９１Ｂ ６９２ ６９２Ａ ６９４ ６９４Ｂ ６９４Ｚ Ｈ０１Ｇ 9/055 Ｈ０１Ｇ 9/04 ３４６ (56)参考文献 特開 平２−51211（ＪＰ，Ａ) 特開 昭63−137505（ＪＰ，Ａ) 特開 昭64−11002（ＪＰ，Ａ) 特開 平４−89118（ＪＰ，Ａ) 特開 平３−130340（ＪＰ，Ａ) 特開 平４−231442（ＪＰ，Ａ) 特公 平１−38865（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C22F 1/04 - 1/057 C22C 21/00 - 21/18 H01G 9/04 - 9/055 ────────────────────────────────────────────────── ─── front page continued (51) Int.Cl. 7 identifications FI C22F 1/00 683 C22F 1/00 683 691 691B 692 692A 694 694B 694Z H01G 9/055 H01G 9/04 346 (56) reference JP JP-A-2-51211 (JP, A) JP-A-63-137505 (JP, A) JP-A-64-11002 (JP, A) JP-A-4-89118 (JP, A) JP-A-3-130340 ( JP, A) JP-A-4-231442 (JP, A) JP-B-1-38865 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) C22F 1/04-1/057 C22C 21/00-21/18 H01G 9/04-9/055
Claims (1)
て、Al純度99.93〜99.98％のアルミニウム鋳塊を得た
後、該アルミニウム鋳塊に温度600℃以上且つ時間３時
間以上の条件で均質化処理を施し、次いで開始温度500
℃以上で且つ終了温度400℃以上で熱間粗圧延を施すと
共に該熱間粗圧延の所要時間を６分以内とし、その後該
熱間粗圧延終了時の温度に対して20℃以内の温度を開始
温度とし且つ終了温度250℃以下で熱間仕上げ圧延を施
すと共に該熱間仕上げ圧延の所要時間を２分以内とし、
得られたアルミニウム板を、該熱間仕上げ圧延終了後に
おいて30℃／hr.以上の冷却速度で冷却し、その後冷間
圧延を施すことを特徴とする電解コンデンサ陽極用アル
ミニウム合金箔の製造方法。1. An aluminum ingot having an Al purity of 99.93 to 99.98% is obtained by appropriately mixing a primary electrolytic metal and a segregation metal with a temperature of 600 ° C. or more and a time of 3 hours or more. Homogenize under the conditions, then start temperature 500
℃ or more and the end temperature of 400 ° C. or more, and the time required for the hot rough rolling is set to 6 minutes or less, and then the temperature within 20 ° C. with respect to the temperature at the end of the hot rough rolling is set. The hot finish rolling is performed at the start temperature and the end temperature of 250 ° C. or less, and the time required for the hot finish rolling is set to 2 minutes or less,
A method for producing an aluminum alloy foil for an anode of an electrolytic capacitor, characterized in that the obtained aluminum plate is cooled at a cooling rate of 30 ° C./hr or more after completion of the hot finish rolling, and then subjected to cold rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04252791A JP3203666B2 (en) | 1991-02-13 | 1991-02-13 | Manufacturing method of aluminum alloy foil for anode of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04252791A JP3203666B2 (en) | 1991-02-13 | 1991-02-13 | Manufacturing method of aluminum alloy foil for anode of electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04259357A JPH04259357A (en) | 1992-09-14 |
| JP3203666B2 true JP3203666B2 (en) | 2001-08-27 |
Family
ID=12638552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04252791A Expired - Fee Related JP3203666B2 (en) | 1991-02-13 | 1991-02-13 | Manufacturing method of aluminum alloy foil for anode of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3203666B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073054A (en) * | 1999-09-06 | 2001-03-21 | Nippon Foil Mfg Co Ltd | Aluminum rolled foil for electrolytic capacitor anode low pressure and its production |
| WO2017018029A1 (en) * | 2015-07-30 | 2017-02-02 | 昭和電工株式会社 | Method for producing aluminum material for electrolytic capacitor electrodes, method for producing electrode material for aluminum electrolytic capacitor, and method for producing aluminum electrolytic capacitor |
-
1991
- 1991-02-13 JP JP04252791A patent/JP3203666B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04259357A (en) | 1992-09-14 |
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