JPH0367331B2 - - Google Patents
Info
- Publication number
- JPH0367331B2 JPH0367331B2 JP22272784A JP22272784A JPH0367331B2 JP H0367331 B2 JPH0367331 B2 JP H0367331B2 JP 22272784 A JP22272784 A JP 22272784A JP 22272784 A JP22272784 A JP 22272784A JP H0367331 B2 JPH0367331 B2 JP H0367331B2
- Authority
- JP
- Japan
- Prior art keywords
- nitrocatechol
- capacitor
- electrolytic solution
- acid
- aluminum electrolytic
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- YHKWFDPEASWKFQ-UHFFFAOYSA-N 3-nitrobenzene-1,2-diol Chemical compound OC1=CC=CC([N+]([O-])=O)=C1O YHKWFDPEASWKFQ-UHFFFAOYSA-N 0.000 claims description 13
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- 239000008151 electrolyte solution Substances 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- XJNPNXSISMKQEX-UHFFFAOYSA-N 4-nitrocatechol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1O XJNPNXSISMKQEX-UHFFFAOYSA-N 0.000 claims description 2
- QWYZOSJILUGSEC-UHFFFAOYSA-N 1-nitrocyclohexa-3,5-diene-1,2-diol Chemical compound OC1C=CC=CC1(O)[N+]([O-])=O QWYZOSJILUGSEC-UHFFFAOYSA-N 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 150000008282 halocarbons Chemical class 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- -1 chlorine ions Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
産業上の利用分野
本発明はアルミニウム電解コンデンサをハロゲ
ン化炭化水素溶液で洗浄した場合にコンデンサに
ハロゲン化炭化水素が浸透して生ずるコンデンサ
内部での腐食断線事故を防止することを目的とし
たアルミニウム電解コンデンサの駆動用電解液に
関するものである。
従来の技術
従来、アルミニウム電解コンデンサはプリント
基板へ挿着する際に用いる半田フラツクスの除去
工程でハロゲン化炭化水素溶液に浸漬、洗浄など
を行う際、コンデンサ内部に浸透したハロゲン化
炭化水素の分解によつて生じた塩素イオンにより
腐食、断線事故が少なからず発生していた。これ
らの事故防止のため、従来コンデンサ封口部に樹
脂を塗布するなどの対策が行われていたが、コス
トを高める要因となり、またその効果も十分なも
のではなかつた。
発明が解決しようとする問題点
本発明は上述の問題に鑑み、駆動用電解液の改
良により確実に腐食事故を防止し得るアルミニウ
ム電解コンデンサの駆動用電解液を提供しようと
するものである。
問題点を解決するための手段
この目的を達成するために本発明においてはエ
チレングリコール、プロピレングリコールなどの
多価アルコール類、あるいはさらに水を加えた溶
媒とし、硼酸、モノカルボン酸、ジカルボン酸、
リン酸またはこれらの塩類の一種または二種以上
を溶質とした電解液において、0.5〜5.0wt％のニ
トロカテコールを添加して電解液を構成したもの
である。
作 用
ニトロカテコールは独立電子対を有する窒素を
構成元素として含んでおり、それにより電子供与
体となる。一方アルミニウム表面は電子受容体と
なる性質を有しアルミニウム表面はニトロカテコ
ール吸着する。特にニトロカテコールはプロトネ
ーシヨンしたニトロ基によりアルミニウム表面に
吸着するため、塩素イオンによる腐食発生は著し
く阻止され、アルミニウム電解コンデンサの塩素
イオンによる腐食事故は確実に防止できる。
上記ニトロカテコールの添加量は駆動用電解液
に0.5〜5.0wt％の範囲内であれば有効かつ実用上
十分である。実用上は駆動用電解液に対しニトロ
カテコール0.5wt％未満では腐食事故を確実に防
止できず、5.0wt％を越える量では高温寿命特性
において、静電容量減少率およびtanδ変化率が大
である。
従つてニトロカテコールの添加量は駆動用電解
液に対し0.5〜5.0wt％が適当てある。
実施例
本発明に係るアルミニウム電解コンデンサの駆
動用電解液の組成を表に示す。
Industrial Application Field The present invention is an aluminum electrolytic capacitor for the purpose of preventing corrosion breakage inside the capacitor caused by penetration of halogenated hydrocarbon into the capacitor when the capacitor is cleaned with a halogenated hydrocarbon solution. This relates to an electrolyte for driving a capacitor. Conventional technology Conventionally, when aluminum electrolytic capacitors are immersed in a halogenated hydrocarbon solution for cleaning during the process of removing solder flux used when inserting them into a printed circuit board, a method is used to decompose the halogenated hydrocarbon that has penetrated into the capacitor. The resulting chlorine ions caused many corrosion and disconnection accidents. In order to prevent these accidents, countermeasures such as applying resin to the capacitor sealing portion have conventionally been taken, but these have been a factor in increasing costs and have not been sufficiently effective. Problems to be Solved by the Invention In view of the above problems, the present invention aims to provide a driving electrolyte for an aluminum electrolytic capacitor that can reliably prevent corrosion accidents by improving the driving electrolyte. Means for Solving the Problems In order to achieve this objective, the present invention uses polyhydric alcohols such as ethylene glycol and propylene glycol, or a solvent to which water is added, and uses boric acid, monocarboxylic acid, dicarboxylic acid, etc.
This is an electrolytic solution containing phosphoric acid or one or more of these salts as a solute, and 0.5 to 5.0 wt% of nitrocatechol added thereto. Action Nitrocatechol contains nitrogen, which has an independent pair of electrons, as a constituent element, thereby acting as an electron donor. On the other hand, the aluminum surface has the property of becoming an electron acceptor, and the aluminum surface adsorbs nitrocatechol. In particular, since nitrocatechol is adsorbed on the aluminum surface by protonated nitro groups, corrosion caused by chlorine ions is significantly inhibited, and corrosion accidents caused by chlorine ions of aluminum electrolytic capacitors can be reliably prevented. The amount of nitrocatechol added to the driving electrolyte is within the range of 0.5 to 5.0 wt%, which is effective and practically sufficient. In practice, corrosion accidents cannot be reliably prevented if nitrocatechol is less than 0.5wt% of the driving electrolyte, and if it exceeds 5.0wt%, the capacitance reduction rate and tanδ change rate are large in high-temperature life characteristics. . Therefore, the appropriate amount of nitrocatechol to be added is 0.5 to 5.0 wt% relative to the driving electrolyte. Examples The composition of the driving electrolyte for the aluminum electrolytic capacitor according to the present invention is shown in the table.
【表】
表中電解液の試料番号４、５、６は本発明の電
解液、１、２、３は比較のための電解液を示す。
表に示した組成からなるアルミニウム電解コンデ
ンサの駆動用電解液を使用して定格50wv−1μF
のアルミニウム電解コンデンサ、１、１、１トリ
クロロエタンの蒸気中に10分間浸漬したものを各
50個試料として85℃中において定格電圧を連続印
加した時の特性を第１図〜第４図に示す。
すなわち、第１図は印加期間と防爆弁作動との
関係を、第２図は印加時間と静電容量変化率との
関係を、第３図は印加時間とtanδの関係を、第４
図は印加時間と漏れ電流との関係を曲線図でそれ
ぞれ示したもので、定格電圧を1000時間印加後の
各試料を分解したが、記号Ａ，Ｂのコンデンサは
腐食現象が顕著であり、腐食により内部圧力が上
昇して防爆弁作動したものである。記号Ｃ，Ｄ，
Ｅ，Ｆのコンデンサは腐食はみられなかつた。
なお、上述の実施例の他、プロピレングリコー
ルなどの多価アルコール類あるいはさらに水を加
えたものを溶媒とし硼酸、モノカルボン酸、ジカ
ルボン酸、リン酸、またはこれらの塩類の一種は
二種以上を溶質とした電解液にニトロカテコール
を添加した電解液を用いても同様の効果が得られ
た。そしてニトロカテーコールは３−ニトカテコ
ールと４−ニトロカテコールを混合したものでも
良い。
発明の効果
以上詳述した通りニトロカテコールを加えた本
発明の駆動用電解液は、アルミニウム電解コンデ
ンサにおいてハロゲン化炭化水素による洗浄を行
つても極めて安定した特性を維持し、信頼性の高
い電解コンデンサが得られ、工業的ならびに実用
的価値の大なるものである。[Table] In the table, electrolyte sample numbers 4, 5, and 6 are electrolytic solutions of the present invention, and 1, 2, and 3 are electrolytic solutions for comparison.
Using the driving electrolyte of an aluminum electrolytic capacitor with the composition shown in the table, the rating is 50wv-1μF.
aluminum electrolytic capacitors, each immersed in 1, 1, 1 trichloroethane vapor for 10 minutes.
Figures 1 to 4 show the characteristics of 50 samples when the rated voltage was continuously applied at 85°C. That is, Figure 1 shows the relationship between the application period and explosion-proof valve operation, Figure 2 shows the relationship between the application time and the capacitance change rate, Figure 3 shows the relationship between the application time and tanδ, and Figure 4 shows the relationship between the application time and the rate of change in capacitance.
The figure shows the relationship between the application time and the leakage current as a curve diagram. Each sample was disassembled after applying the rated voltage for 1000 hours, but the capacitors with symbols A and B showed significant corrosion. This caused the internal pressure to rise and activate the explosion-proof valve. Symbols C, D,
No corrosion was observed in capacitors E and F. In addition to the above-mentioned examples, boric acid, monocarboxylic acid, dicarboxylic acid, phosphoric acid, or two or more of these salts can be used in combination with a polyhydric alcohol such as propylene glycol or water added as a solvent. Similar effects were obtained using an electrolytic solution in which nitrocatechol was added as a solute. The nitrocatechol may be a mixture of 3-nitrocatechol and 4-nitrocatechol. Effects of the Invention As detailed above, the driving electrolyte of the present invention containing nitrocatechol maintains extremely stable characteristics even when aluminum electrolytic capacitors are cleaned with halogenated hydrocarbons, and is a highly reliable electrolytic capacitor. obtained, and is of great industrial and practical value.
第１図はアルミニウム電解コンデンサの印加時
間−防爆弁作動特性図、第２図は同コンデンサの
印加時間−静電容量変化率特性図、第３図は同コ
ンデンサの印加時間−tanδ特性図、第４図は同コ
ンデンサの印加時間−漏れ電流特性図である。
Ａ，Ｂ，Ｃ：比較のための試料、Ｄ，Ｅ，Ｆ：
本発明に係る試料。
Figure 1 is an application time vs. explosion-proof valve operation characteristic diagram for an aluminum electrolytic capacitor, Figure 2 is an application time vs. capacitance change rate characteristic diagram for the same capacitor, and Figure 3 is an application time vs. tanδ characteristic diagram for the same capacitor. Figure 4 is an application time-leakage current characteristic diagram of the same capacitor. A, B, C: Samples for comparison, D, E, F:
Sample according to the present invention.
Claims (1)
などの多価アルコール類あるいはさらに水を加え
たものを溶媒とし、硼酸、モノカルボン酸、ジカ
ルボン酸、リン酸、またはこれらの塩類の一種ま
たは二種以上を溶質とした電解液において、0.5
〜5.0wt％のニトロカテコールを添加したことを
特徴とするアルミニウム電解コンデンサの駆動用
電解液。 ２ ニトロカテコールが３−ニトロカテコール、
４−ニトロカテコールの少なくとも１種であるこ
とを特徴とする特許請求の範囲第１項記載のアル
ミニウム電解コンデンサの駆動用電解液。[Scope of Claims] 1. Polyhydric alcohols such as ethylene glycol and propylene glycol or water added thereto as a solvent, boric acid, monocarboxylic acid, dicarboxylic acid, phosphoric acid, or one or two of these salts. In an electrolytic solution containing the above solute, 0.5
An electrolytic solution for driving an aluminum electrolytic capacitor characterized by adding ~5.0wt% nitrocatechol. 2 Nitrocatechol is 3-nitrocatechol,
The electrolytic solution for driving an aluminum electrolytic capacitor according to claim 1, characterized in that the electrolytic solution is at least one kind of 4-nitrocatechol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22272784A JPS61100919A (en) | 1984-10-22 | 1984-10-22 | Driving electrolytic liquid for aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22272784A JPS61100919A (en) | 1984-10-22 | 1984-10-22 | Driving electrolytic liquid for aluminum electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61100919A JPS61100919A (en) | 1986-05-19 |
| JPH0367331B2 true JPH0367331B2 (en) | 1991-10-22 |
Family
ID=16786949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22272784A Granted JPS61100919A (en) | 1984-10-22 | 1984-10-22 | Driving electrolytic liquid for aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61100919A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63142805A (en) * | 1986-12-06 | 1988-06-15 | 日本ケミコン株式会社 | Electrolytic capacitor |
| JPH0254921A (en) * | 1988-08-19 | 1990-02-23 | Nichicon Corp | Electrolytic solution for driving electrolytic capacitor |
| US7432233B2 (en) * | 2003-12-18 | 2008-10-07 | Interuniversitair Microelektronica Centrum (Imec) | Composition and method for treating a semiconductor substrate |
-
1984
- 1984-10-22 JP JP22272784A patent/JPS61100919A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61100919A (en) | 1986-05-19 |
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