JPS624890A - Surface treating agent - Google Patents

Surface treating agent

Info

Publication number
JPS624890A
JPS624890A JP14286585A JP14286585A JPS624890A JP S624890 A JPS624890 A JP S624890A JP 14286585 A JP14286585 A JP 14286585A JP 14286585 A JP14286585 A JP 14286585A JP S624890 A JPS624890 A JP S624890A
Authority
JP
Japan
Prior art keywords
surface treatment
surface treating
anionic surfactant
treatment agent
reducing agent
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.)
Granted
Application number
JP14286585A
Other languages
Japanese (ja)
Other versions
JPH0512436B2 (en
Inventor
Yuzo Yokota
横田　雄三
Keiichi Araki
啓一 荒木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Foil Manufacturing Co Ltd
Original Assignee
Nippon Foil Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Foil Manufacturing Co Ltd filed Critical Nippon Foil Manufacturing Co Ltd
Priority to JP14286585A priority Critical patent/JPS624890A/en
Publication of JPS624890A publication Critical patent/JPS624890A/en
Publication of JPH0512436B2 publication Critical patent/JPH0512436B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C23F1/32—Alkaline compositions
    • C23F1/36—Alkaline compositions for etching aluminium or alloys thereof

Abstract

PURPOSE:To obtain a surface treating agent suitable for Al foil used for an electrolytic capacitor by providing a composition consisting of an alkali metallic compound, an anionic surfactant and an org. reducing agent. CONSTITUTION:This surface treating agent is composed of an alkali metallic compound, an anionic surfactant and an org. reducing agent. Sodium hydroxide is used as the alkali metallic compound, sodium alkylnaphthalenesulfonate as the anionic surfactant, and ethanolamine as the org. reducing agent. When metallic foil, especially Al foil is treated with the surface treating agent, the etching rate is increased.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、主として電解コンデンサとして用いるアルミ
ニウム箔の表面処理剤に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates primarily to a surface treatment agent for aluminum foil used as an electrolytic capacitor.

（ロ）従来の技術及び発明が解決しようとする問題点 トランジスタやＩＣ（集積回路）の出現以来、電気機器
や電子機器の小型化が図られている。そしてこのため、
電気機器等に用いる電解コンデンサの小型化も同時に図
られている。電解コンデンサを小型化するためには、特
に陽極の表面積を拡大させ、単位面積当たりの静電容量
を増加させる必要がある。(b) Problems to be Solved by the Prior Art and Inventions Since the advent of transistors and ICs (integrated circuits), electrical and electronic devices have been miniaturized. And for this reason,
At the same time, efforts are being made to downsize electrolytic capacitors used in electrical equipment and the like. In order to miniaturize electrolytic capacitors, it is necessary to particularly increase the surface area of the anode and increase the capacitance per unit area.

従来より、アルミニウム箔を用いた電解コンデンサでは
、陽極の表面積を拡大するために、酸腐食によってエツ
チングを行い表面に凹凸を設けている。そしてこのエツ
チング処理に関して種々の研究がなされている。Conventionally, in electrolytic capacitors using aluminum foil, in order to increase the surface area of the anode, etching is performed using acid corrosion to create irregularities on the surface. Various studies have been conducted regarding this etching process.

本発明者等もアルミニウム箔の表面積の拡大を図るため
種々研究を行っていたが、その際エツチング処理技術よ
りもむしろ材料であるアルミニウム箔の表面の状態が重
要であると考えた。即ち、一般的にアルミニウム箔の表
面には圧延油が膜状に付着しており、このためエツチン
グ処理してもエツチングが十分に行えないと考えられる
のである。本発明は、この着眼点に基づきなされたもの
であり、ある特定の表面処理剤でアルミニウム箔を処理
しておくと、従来と同様のエツチング処理で、従来にお
けるよりも更に表面積の拡大が図れることを見出したの
である。The inventors of the present invention had also conducted various studies to increase the surface area of aluminum foil, but at that time they believed that the condition of the surface of the material, aluminum foil, was more important than the etching treatment technique. That is, rolling oil generally adheres to the surface of the aluminum foil in the form of a film, and for this reason it is thought that sufficient etching cannot be achieved even when etching is performed. The present invention was made based on this point of view, and it is found that by treating aluminum foil with a specific surface treatment agent, the surface area can be further expanded than in the past with the same etching treatment as in the past. They discovered this.

（ハ）問題点を解決するための手段及び作用即ち本発明
は、種々の金属箔をエツチング処理する前段階で用いる
表面処理剤であって、アルカリ金属化合物、陰イオン界
面活性剤及び有機還元剤とからなることを特徴とする表
面処理剤に係るものである。(c) Means and action for solving the problems, that is, the present invention is a surface treatment agent used in a stage before etching various metal foils, which comprises an alkali metal compound, an anionic surfactant, and an organic reducing agent. The present invention relates to a surface treatment agent characterized by comprising:

アルカリ金属化合物としては、水酸化ナトリウム、水酸
化リチウム、水酸化カリウム、炭酸ソーダ、重炭酸ソー
ダ、ケイ酸カリウム、ケイ酸ナトリウム、メタケイ酸ナ
トリウム、第三リン酸ナトリウム、第ニリン酸ナトリウ
ム等が用いられる。As the alkali metal compound, sodium hydroxide, lithium hydroxide, potassium hydroxide, soda carbonate, sodium bicarbonate, potassium silicate, sodium silicate, sodium metasilicate, trisodium phosphate, sodium diphosphate, etc. are used.

これらの中でも特に水酸化ナトリウムが本発明において
用いるのに好ましい。Among these, sodium hydroxide is particularly preferred for use in the present invention.

陰イオン界面活性剤としては、脂肪酸、アルキルヘンゼ
ンスルホン酸塩、アルキルスルホン酸塩。Examples of anionic surfactants include fatty acids, alkylhenzenesulfonates, and alkylsulfonates.

α−オレフィンスルホン酸塩、ジアルキルスルホコハク
酸塩、α−スルホン化脂肪酸塩、アルキルナフタリンス
ルホン酸塩、Ｎ−メチル−Ｎ−オレイルタウリン、アル
キルリン酸塩、アルキル硫酸塩、ポリオキシエチレンア
ルキルエーテルリン酸塩、ポリオキシエチレンアルキル
フェニルエーテルリン酸塩、ポリオキシエチレンアルキ
ルフェニルエーテル硫酸塩、ナフタリンスルホン酸塩ホ
ルムアルデヒド縮合物、ポリオキシエチレンアルキルエ
ーテル硫酸塩など各種のものが用いられる。α-olefin sulfonate, dialkyl sulfosuccinate, α-sulfonated fatty acid salt, alkylnaphthalene sulfonate, N-methyl-N-oleyl taurine, alkyl phosphate, alkyl sulfate, polyoxyethylene alkyl ether phosphate Various salts such as polyoxyethylene alkylphenyl ether phosphate, polyoxyethylene alkylphenyl ether sulfate, naphthalene sulfonate formaldehyde condensate, and polyoxyethylene alkyl ether sulfate are used.

これらの中でも、特にアルキルナフタリンスルホン酸ソ
ーダが本発明において好適に使用できる。Among these, sodium alkylnaphthalene sulfonate can be particularly preferably used in the present invention.

有機還元剤としては、金属箔の表面の酸化を防止する作
用をするものであればどのようなものでも採用しうるが
、具体的にはモノエタノールアミン、エチレンジアミン
、ヒドラジン、ホルムアルデヒド、アセトアルデヒド、
Ｌ−アスコルビン酸等が用いられる。これらの中でもア
ミン化合物、特にモノエタノールアミンが本発明におい
て好適に使用できる。Any organic reducing agent can be used as long as it has the effect of preventing oxidation of the surface of the metal foil, but specific examples include monoethanolamine, ethylenediamine, hydrazine, formaldehyde, acetaldehyde,
L-ascorbic acid and the like are used. Among these, amine compounds, particularly monoethanolamine, can be suitably used in the present invention.

陰イオン界面活性剤や有機還元剤のアルカリ金属化合物
に対する配合割合は臨界的に定まるものではないが、ア
ルカリ金属化合物１００部（重量部、以下同じ）に対し
て、陰イオン界面活性剤５０〜５００部、有機還元剤２
０〜４５０部程度がよい。陰イオン界面活性剤が５０部
より少なくなり過ぎると金属箔表面を均一に処理できな
い傾向となり、又５００部より多すぎても効果の点で限
界に達する傾向となる。有機還元剤が２０部より少なす
ぎると、その還元剤の還元力にもよるが、金属箔表面の
酸化を防止する能力が弱くなる傾向となり、又４５０部
より多く配合しても酸化防止能力は飽和状態になる傾向
となる。本発明に係る表面処理剤は、使用に際しては、
２〜２０部程度の水に熔解させて用いる。The blending ratio of the anionic surfactant and organic reducing agent to the alkali metal compound is not critically determined, but 50 to 500 parts of the anionic surfactant to 100 parts (parts by weight, same hereinafter) of the alkali metal compound. part, organic reducing agent 2
Approximately 0 to 450 parts is preferable. If the anionic surfactant is less than 50 parts, the surface of the metal foil tends not to be uniformly treated, and if it is more than 500 parts, the effectiveness tends to reach its limit. If the amount of the organic reducing agent is less than 20 parts, the ability to prevent oxidation on the surface of the metal foil tends to be weakened, although it depends on the reducing power of the reducing agent, and even if the amount is more than 450 parts, the ability to prevent oxidation will decrease. It tends to become saturated. When using the surface treatment agent according to the present invention,
It is used after being dissolved in about 2 to 20 parts of water.

本発明に係る表面処理剤で処理した金属箔、特にアルミ
ニウム箔のエツチング倍率が増大する理由は、明確では
ないが、本発明に係る表面処理剤は金属箔表面の圧延油
を除去するだけでなく、エツチング処理において有害な
珪素やカルシウム等の無機物質を金属箔の表面から除去
するためと推察される。The reason why the etching magnification of metal foil, especially aluminum foil, increases when treated with the surface treatment agent of the present invention is not clear, but the surface treatment agent of the present invention not only removes rolling oil from the surface of the metal foil, but also removes rolling oil from the surface of the metal foil. It is presumed that this is to remove harmful inorganic substances such as silicon and calcium from the surface of the metal foil during the etching process.

（ニ）実施例 厚さＱ、ＬＯ（Ｊａｍ、純度９９．９９％のアルミニウ
ム箔を、水酸化ナトリウム（Ａ成分）、アルキルナフタ
リンスルホン酸ソーダ（Ｂ成分）及びモノエタノールア
ミン（Ｃ成分）よりなる各種配合割合の表面処理剤（実
施例１〜６）で処理した。その後不活性ガス雰囲気中で
高温焼鈍し、これを７５℃の５％塩酸水溶液中で電流密
度１６　Ａ　／　ｄ　ｍの直流電流を流して５００秒間
電解エツチングを行った。続いてホウ酸溶液中で、３７
５■の電圧で化成処理を行い、アルミニウム箔陽極電極
を作成した。(D) Example thickness Q, LO (Jam, 99.99% purity aluminum foil, made of sodium hydroxide (component A), sodium alkylnaphthalene sulfonate (component B) and monoethanolamine (component C) It was treated with surface treatment agents (Examples 1 to 6) with various blending ratios.Then, it was annealed at high temperature in an inert gas atmosphere, and then subjected to direct current at a current density of 16 A/d m in a 5% aqueous hydrochloric acid solution at 75°C. Electrolytic etching was performed for 500 seconds in a boric acid solution.
A chemical conversion treatment was performed at a voltage of 5 µm to produce an aluminum foil anode electrode.

又、水酸化カリウム（Ａ成分）、アルキルスルホン酸ソ
ーダ（Ｂ成分）及びエチレンジアミン（Ｃ成分）よりな
る表面処理剤（実施例７）、水酸化リチウム（Ａ成分）
、アルキルリン酸ソーダ（Ｂ成分）及びアセトアルデヒ
ド（Ｃ成分）よりなる表面処理剤（実施例８）を用いて
実施例１〜６と同様に処理してアルミニウム箔陽極電極
を作成した。In addition, a surface treatment agent (Example 7) consisting of potassium hydroxide (component A), sodium alkylsulfonate (component B) and ethylenediamine (component C), lithium hydroxide (component A)
An aluminum foil anode electrode was prepared in the same manner as in Examples 1 to 6 using a surface treatment agent (Example 8) consisting of sodium alkyl phosphate (component B) and acetaldehyde (component C).

さらに、比較のため市販の表面処理剤（比較例１、アル
タ３３６１０％水溶液、ヘンケル白水社製）を用いて実
施例１〜６と同様に処理してアルミニウム箔陽極電極を
作成した。Furthermore, for comparison, aluminum foil anode electrodes were prepared in the same manner as in Examples 1 to 6 using a commercially available surface treatment agent (Comparative Example 1, Ulta 336 10% aqueous solution, manufactured by Henkel Hakusuisha).

これらの電極の静電容量を測定した。その結果を表に示
す。尚、静電容量は交流ブリッジ法（周波数１２０Ｈｚ
）で測定した。The capacitance of these electrodes was measured. The results are shown in the table. In addition, the capacitance was measured using the AC bridge method (frequency 120Hz).
) was measured.

表 以上の結果から明らかなとおり、本発明に係る表面処理
剤を用いて処理して作成した陽極電極は従来のものに比
較して静電容量が増大していることが判る。特に組成成
分として、水酸化ナトリウム、アルキルナフタリンスル
ホン酸ソーダ及びモノエタノールアミンよりなるものを
用いた場合には、顕著に静電容量が増大している。As is clear from the results in the table above, it can be seen that the anode electrode prepared by treatment using the surface treatment agent according to the present invention has an increased capacitance compared to the conventional one. In particular, when sodium hydroxide, sodium alkylnaphthalene sulfonate, and monoethanolamine are used as composition components, the capacitance increases significantly.

（ホ）発明の効果 本発明に係る表面処理剤を用いて処理した金属箔は、従
来と同様のエツチング処理を施しただけで、従来よりエ
ツチング倍率が向上し、その結果静電容量が増大すると
いう効果を奏するものである。(E) Effects of the Invention Metal foil treated using the surface treatment agent of the present invention has an etching magnification higher than that of the conventional method, and as a result, an increase in capacitance by simply performing the same etching treatment as in the conventional method. This has this effect.

Claims (4)

【特許請求の範囲】[Claims] （１）アルカリ金属化合物、陰イオン界面活性剤及び有
機還元剤とからなることを特徴とする表面処理剤。(1) A surface treatment agent comprising an alkali metal compound, an anionic surfactant, and an organic reducing agent. （２）アルカリ金属化合物が水酸化ナトリウムである特
許請求の範囲第（１）項記載の表面処理剤。(2) The surface treatment agent according to claim (1), wherein the alkali metal compound is sodium hydroxide. （３）陰イオン界面活性剤がアルキルナフタリンスルホ
ン酸ソーダである特許請求の範囲第（１）又は（２）項
記載の表面処理剤。(3) The surface treatment agent according to claim (1) or (2), wherein the anionic surfactant is sodium alkylnaphthalene sulfonate. （４）有機還元剤がモノエタノールアミンである特許請
求の範囲第（１）、（２）又は（３）項記載の表面処理
剤。(4) The surface treatment agent according to claim 1, (2) or (3), wherein the organic reducing agent is monoethanolamine.
JP14286585A 1985-06-29 1985-06-29 Surface treating agent Granted JPS624890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14286585A JPS624890A (en) 1985-06-29 1985-06-29 Surface treating agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14286585A JPS624890A (en) 1985-06-29 1985-06-29 Surface treating agent

Publications (2)

Publication Number Publication Date
JPS624890A true JPS624890A (en) 1987-01-10
JPH0512436B2 JPH0512436B2 (en) 1993-02-18

Family

ID=15325401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14286585A Granted JPS624890A (en) 1985-06-29 1985-06-29 Surface treating agent

Country Status (1)

Country Link
JP (1) JPS624890A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01214108A (en) * 1988-02-23 1989-08-28 Mitsubishi Alum Co Ltd Foil for electrolytic capacitor electrode
JPH0521285A (en) * 1990-08-21 1993-01-29 Asahi Glass Co Ltd Method of etching aluminum foil for electrolytic capacitor
US5513766A (en) * 1993-11-30 1996-05-07 Sandoz Ltd. Aluminum etching
JP2013253076A (en) * 2012-05-09 2013-12-19 Japan Enviro Chemicals Ltd Antiseptic agent composition
CN115679328A (en) * 2022-10-14 2023-02-03 湖北兴福电子材料股份有限公司 Preparation method of aluminum etching solution with high etching rate and depth-to-width ratio

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5314709A (en) * 1976-07-27 1978-02-09 Nitto Kagaku Kk Detergent composition
JPS6092489A (en) * 1983-10-26 1985-05-24 Sumitomo Light Metal Ind Ltd Production of aluminum foil for electropolytic capacitor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5314709A (en) * 1976-07-27 1978-02-09 Nitto Kagaku Kk Detergent composition
JPS6092489A (en) * 1983-10-26 1985-05-24 Sumitomo Light Metal Ind Ltd Production of aluminum foil for electropolytic capacitor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01214108A (en) * 1988-02-23 1989-08-28 Mitsubishi Alum Co Ltd Foil for electrolytic capacitor electrode
JPH0521285A (en) * 1990-08-21 1993-01-29 Asahi Glass Co Ltd Method of etching aluminum foil for electrolytic capacitor
US5513766A (en) * 1993-11-30 1996-05-07 Sandoz Ltd. Aluminum etching
JP2013253076A (en) * 2012-05-09 2013-12-19 Japan Enviro Chemicals Ltd Antiseptic agent composition
CN115679328A (en) * 2022-10-14 2023-02-03 湖北兴福电子材料股份有限公司 Preparation method of aluminum etching solution with high etching rate and depth-to-width ratio
CN115679328B (en) * 2022-10-14 2023-08-25 湖北兴福电子材料股份有限公司 Preparation method of aluminum etching liquid with high etching rate and depth-to-width ratio

Also Published As

Publication number Publication date
JPH0512436B2 (en) 1993-02-18

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