JPH0531287B2 - - Google Patents
Info
- Publication number
- JPH0531287B2 JPH0531287B2 JP10083184A JP10083184A JPH0531287B2 JP H0531287 B2 JPH0531287 B2 JP H0531287B2 JP 10083184 A JP10083184 A JP 10083184A JP 10083184 A JP10083184 A JP 10083184A JP H0531287 B2 JPH0531287 B2 JP H0531287B2
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- electrolytic solution
- electrolyte
- capacitor
- aluminum
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 11
- 239000008151 electrolyte solution Substances 0.000 claims description 11
- VYWYYJYRVSBHJQ-UHFFFAOYSA-N 3,5-dinitrobenzoic acid Chemical compound OC(=O)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1 VYWYYJYRVSBHJQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- DBRHOLYIDDOQSD-UHFFFAOYSA-N alumane;lead Chemical group [AlH3].[Pb] DBRHOLYIDDOQSD-UHFFFAOYSA-N 0.000 description 2
- -1 amine salt Chemical class 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 1
- OCKGFTQIICXDQW-ZEQRLZLVSA-N 5-[(1r)-1-hydroxy-2-[4-[(2r)-2-hydroxy-2-(4-methyl-1-oxo-3h-2-benzofuran-5-yl)ethyl]piperazin-1-yl]ethyl]-4-methyl-3h-2-benzofuran-1-one Chemical compound C1=C2C(=O)OCC2=C(C)C([C@@H](O)CN2CCN(CC2)C[C@H](O)C2=CC=C3C(=O)OCC3=C2C)=C1 OCKGFTQIICXDQW-ZEQRLZLVSA-N 0.000 description 1
- 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
- 239000005711 Benzoic acid Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 235000019293 ammonium adipate Nutrition 0.000 description 1
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 description 1
- ORKKMKUDEPWHTG-UHFFFAOYSA-N azane;nonanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCC([O-])=O ORKKMKUDEPWHTG-UHFFFAOYSA-N 0.000 description 1
- 235000010233 benzoic acid 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
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Secondary Cells (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
(イ) 産業上の利用分野
本発明は電解コンデンサ駆動用電解液（以下単
に電解液と称する）に関する。
(ロ) 従来技術
アルミニウム電解コンデンサにおいては、使用
しているアルミニウムが塩化物イオンによつて腐
食しやすく、従来、コンデンサに通電中、陽極ア
ルミニウムが腐食し断線する事故が少なからず発
生していた。
特公昭58−6298号公報に開示された如く、酸化
ホウ素を電解液に添加することは、上記の様な腐
食を防止するのに効果的である。しかし、これと
ても、より長期の耐腐食性については、いまだ不
十分である。
(ハ) 発明の目的
本発明は、長期の耐腐食効果を呈する電解液を
提供するものである。
(ニ) 発明の構成
本発明の電解液の特徴は、３，５−ジニトロ安
息香酸又は、その塩を添加したことにある。
３，５−ジニトロ安息香酸は、腐食防止剤とし
て働き、そのためには、電解液の溶媒100ml当り
0.5ｇ以上添加されることが好ましい。
３，５−ジニトロ安息香酸は、そのまゝ添加さ
れてもよく、あるいは、そのアンモニウム塩やア
ミン塩等の形で添加されてもよい。
本発明の電解液において、その溶媒や溶質は特
に限定されるものではないが、例えば溶媒として
は、エチレングリコール、メチルカルビトール、
ジエチレングリコールあるいはこれらの混合物が
用いられ、又溶質としては、アゼライン酸アンモ
ニウム、アジピン酸アンモニウム、ギ酸アンモニ
ウム、あるいは、硼酸、マレイン酸、安息香酸及
びこれらのアンモニウム塩やアミン塩が用いられ
る。
(ホ) 実施例
第１表に、本発明の実施例と比較のための参考
例との各電解液組成を示す。尚、腐食を加速する
ために、各電解液には100ppmの塩化ナトリウム
が添加されている。
(a) Industrial Application Field The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter simply referred to as electrolytic solution). (B) Prior Art In aluminum electrolytic capacitors, the aluminum used is easily corroded by chloride ions, and in the past, there have been many accidents in which the anode aluminum corrodes and breaks when electricity is applied to the capacitor. As disclosed in Japanese Patent Publication No. 58-6298, adding boron oxide to the electrolytic solution is effective in preventing the above-mentioned corrosion. However, this is still insufficient for long-term corrosion resistance. (c) Object of the invention The present invention provides an electrolytic solution that exhibits long-term corrosion resistance. (d) Structure of the Invention The electrolytic solution of the present invention is characterized by the addition of 3,5-dinitrobenzoic acid or a salt thereof. 3,5-dinitrobenzoic acid acts as a corrosion inhibitor and is therefore required to
It is preferable to add 0.5g or more. 3,5-dinitrobenzoic acid may be added as is or in the form of its ammonium salt, amine salt, or the like. In the electrolytic solution of the present invention, the solvent and solute are not particularly limited, but examples of the solvent include ethylene glycol, methyl carbitol,
Diethylene glycol or a mixture thereof is used, and as the solute, ammonium azelaate, ammonium adipate, ammonium formate, or boric acid, maleic acid, benzoic acid, and their ammonium salts and amine salts are used. (e) Examples Table 1 shows the electrolyte compositions of Examples of the present invention and Reference Examples for comparison. Additionally, 100 ppm of sodium chloride was added to each electrolyte to accelerate corrosion.
【表】
第２表に上記電解液を用いたコンデンサの高温
負荷試験（85℃定格電圧印加）の結果を示す。試
料コンデンサは、何れも化成したエツチドアルミ
ニウム箔と陰極箔とをセパレータ紙をはさんで巻
回したコンデンサ素子に電解液を含浸し、それを
アルミケースに収納したものであり、実施例１参
考例1A、1Bについては、定格250v、470μFで、
ケースの封口はゴム貼積層板によりなされたも
の、実施例２、参考例2Aについては、定格16v、
33μFで、ケース開口はゴム封口されたものであ
る。[Table] Table 2 shows the results of a high temperature load test (85°C rated voltage applied) of a capacitor using the above electrolyte. The sample capacitors were all capacitor elements made by winding chemically etched aluminum foil and cathode foil with separator paper in between, impregnated with electrolyte, and housed in an aluminum case. For examples 1A and 1B, the rating is 250v, 470μF,
The case is sealed with a rubber laminated board, and for Example 2 and Reference Example 2A, the rating is 16V,
It is 33μF and the case opening is sealed with rubber.
【表】【table】
【表】
上記表にて、腐食とはアルミケース内にて、コ
ンデンサ素子より封口部に至るアルミリード部分
の腐食を云い、又断線とは、斯るアルミリード部
分の腐食が進行して断線に至つたものを云う。上
記表から明らかな如く、本実施例の電解液では
1000時間後も腐食や断線の異常が見られず、よつ
て３，５−ジニトロ安息香酸の腐食防止効果は明
らかである。
本発明において、３，５−ジニトロ安息香酸の
添加量は、溶媒100mlに対し、0.5ｇ以上飽和濃度
までが好ましい。第３表、第４表において、この
ことを示す。尚、各電解液は、腐食を加速するべ
く100ppmの塩化ナトリウムを含む。第４表は高
温負荷試験結果（85℃定格電圧印加）を示し、試
料コンデンサの形態は、実施例２の場合と同一で
あり、定格は50v、1000μFである。[Table] In the above table, corrosion refers to the corrosion of the aluminum lead part from the capacitor element to the sealing part within the aluminum case, and disconnection refers to the corrosion of the aluminum lead part progressing to breakage. Say what you have achieved. As is clear from the table above, the electrolyte of this example
Even after 1000 hours, no abnormalities such as corrosion or wire breakage were observed, and the corrosion-inhibiting effect of 3,5-dinitrobenzoic acid is therefore clear. In the present invention, the amount of 3,5-dinitrobenzoic acid added is preferably 0.5 g or more to saturation concentration per 100 ml of solvent. This is shown in Tables 3 and 4. Note that each electrolyte contains 100 ppm of sodium chloride to accelerate corrosion. Table 4 shows the high temperature load test results (85° C. rated voltage applied), the form of the sample capacitor is the same as in Example 2, and the rating is 50 V and 1000 μF.
【表】【table】
【表】
第４表により、本実施例の如く、３，５−ジニ
トロ安息香酸を溶媒100mlに対し0.5ｇ以上添加す
れば1000時間後も腐食断線等の異常が認められ
ず、又飽和濃度に近い7.5ｇ添加の場合も結果は
良好である。
(ヘ) 発明の効果
本発明電解液は、1000時間といつた長期の高温
負荷試験においても良好な耐腐食効果を示し、よ
つて電解コンデンサの長寿命化をもたらす。[Table] According to Table 4, if 3,5-dinitrobenzoic acid is added at least 0.5g to 100ml of solvent as in this example, no abnormalities such as corrosion and disconnection will be observed even after 1000 hours, and the saturated concentration will be The results are good even when adding 7.5g. (F) Effects of the Invention The electrolytic solution of the present invention exhibits good anti-corrosion effects even in long-term high-temperature load tests of up to 1000 hours, thereby extending the life of electrolytic capacitors.
Claims (1)
ニトロ安息香酸又は、その塩を添加したことを特
徴とする電解コンデンサ駆動用電解液。 ２ 特許請求の範囲第１項において、上記３，５
−ジニトロ安息香酸の添加量は溶媒100ml当り0.5
ｇ以上であることを特徴とする電解コンデンサ駆
動用電解液。[Scope of Claims] 1. An electrolytic solution for driving an electrolytic capacitor, characterized in that 3,5-dinitrobenzoic acid or a salt thereof is added to an electrolytic solution consisting of a solvent and a solute. 2 In claim 1, the above 3. and 5.
-The amount of dinitrobenzoic acid added is 0.5 per 100 ml of solvent.
An electrolytic solution for driving an electrolytic capacitor, characterized in that the electrolytic solution has an electrolyte of at least g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10083184A JPS60245110A (en) | 1984-05-18 | 1984-05-18 | Electrolyte for driving electrolytic condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10083184A JPS60245110A (en) | 1984-05-18 | 1984-05-18 | Electrolyte for driving electrolytic condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60245110A JPS60245110A (en) | 1985-12-04 |
| JPH0531287B2 true JPH0531287B2 (en) | 1993-05-12 |
Family
ID=14284260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10083184A Granted JPS60245110A (en) | 1984-05-18 | 1984-05-18 | Electrolyte for driving electrolytic condenser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60245110A (en) |
-
1984
- 1984-05-18 JP JP10083184A patent/JPS60245110A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60245110A (en) | 1985-12-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |