KR0128550B1 - Anti-etching method of aluminum foil for electrolytic capacitor - Google Patents
Anti-etching method of aluminum foil for electrolytic capacitorInfo
- Publication number
- KR0128550B1 KR0128550B1 KR1019940014636A KR19940014636A KR0128550B1 KR 0128550 B1 KR0128550 B1 KR 0128550B1 KR 1019940014636 A KR1019940014636 A KR 1019940014636A KR 19940014636 A KR19940014636 A KR 19940014636A KR 0128550 B1 KR0128550 B1 KR 0128550B1
- Authority
- KR
- South Korea
- Prior art keywords
- aluminum foil
- film
- foil
- corrosion
- solution
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/02—Diaphragms; Separators
Abstract
Description
도면은 본 발명에 따른 알루미늄박의 양측 모서리 부분에 부식방지 피막을 형성시키는 과정을 도시한 개략도.Figure is a schematic diagram showing a process of forming an anti-corrosion coating on both corner portions of the aluminum foil according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 알루미늄박 (Al Foil) 20 : 귀금속전극(Ti Cathode Electrode)10: Al Foil 20: Ti Cathode Electrode
30 : 부도체물질(Solution-Sinking Material)30: Solution-Sinking Material
40 : 부동태피막 생성용액(Film-Making Solution)40: Film-Making Solution
본 발명은 전해콘덴서용 알루미늄박의 피막형성방법에 관한 것으로, 보다 상세하게 설명하면, 알루미늄박의 전해에칭작업 전에 과다부식이 발생되기 쉬운 알루미늄박 모서리 부분을 귀금속 전극이 내삽된 부도체 물질 사이를 통과시켜 부동태피막을 형성시켜 전해에칭작업시 모서리부분에 과다부식이 발생되는 것을 방지 할수 있도록한 전해콘덴서용 알루미늄박의 부식방지 피막형성방법에 관한 것이다.The present invention relates to a film forming method of an aluminum foil for an electrolytic capacitor, and in more detail, before the electrolytic etching operation of the aluminum foil, the edge portion of the aluminum foil, which is likely to cause excessive corrosion, is passed between the non-conductive material in which the precious metal electrode is interpolated. The present invention relates to a method for forming an anti-corrosion coating of an aluminum foil for an electrolytic capacitor, by forming a passivation film so as to prevent excessive corrosion at the corners during electrolytic etching.
일반적으로 알려져 있는 전해 콘덴서는 알루미늄박(Al Foil)은 표면에 산화피막을 형성하고, 전해질을 침지시킨 종이를 개재시켜 제작하게 된다.A generally known electrolytic capacitor is an aluminum foil (Al Foil) is formed by forming an oxide film on the surface, and interposing a paper immersed in the electrolyte.
이때, 상기 전해콘덴서에 사용되는 알루미늄박(Foil)은 반응성이 풍부한 금속임에도 불구하고 양극산화처리를 통하여 안정된 Al2O3의 산화피막이 형성되어 뛰어난 내식성을 갖추므로 대기속에서도 표면이 안정되어 내부의 보호가 확실하게 이루어지도록한다.At this time, although the aluminum foil used in the electrolytic capacitor is a highly reactive metal, stable oxide film of Al 2 O 3 is formed through anodization to provide excellent corrosion resistance. To make sure it is done.
일반적으로 알루미늄박을 전해에칭할 경우, 알루미늄박의 모서리(Edge) 부분에 과다한 전류가 흘러 과다부식이 일어나는 경향이 있으며, 이를 해결하기 위한 방법으로 종래에는 알루미늄박의 모서리 부분에 폴리머 등을 도모하여 과다부식이 발생되는 것을 방지하고 있다.In general, when aluminum foil is electrolytically etched, excessive current flows in the edge portion of the aluminum foil, which tends to cause excessive corrosion. In order to solve this problem, a polymer or the like is conventionally used in the edge portion of the aluminum foil. To prevent excessive corrosion.
그러나 상기와 같이 알루미늄박의 모서리부분에 폴리머을 사용하여 산회피막을 생성시키는 방법은 알루미늄박의 피막형성작업 후에 별도의 폴리머 제거공정을 반드시 거쳐야 하며, 또한 폴리머와 알루미늄박 사이에 미세한 틈이라도 생기면 그 부위에서 크레비스커로션(Crevice corrosion)이 발생하여 과다부식으로 진행되는 역효과가 일어나게 되는 등 많은 문제점이 있었다.However, as described above, a method of producing an acid lime film by using a polymer at the corners of the aluminum foil must go through a separate polymer removal process after the film formation of the aluminum foil, and if a minute gap occurs between the polymer and the aluminum foil, There were many problems, such as the crevice corrosion (Crevice corrosion) occurs in the adverse effects of excessive corrosion.
본 발명은 상기한 바와같은 종래의 여러 문제점들을 개선시키기 위하여 안출된 것으로서 그 목적은, 부식에 취약한 알루미늄박의 모서리 부분에 Al2O3부동태피막을 형성시켜 전해에칭작업시 모서리부분에 과다부식이 발생되는 것을 방지하고, 피막 제거와 같은 별도이 후처리 작업이 필요없게 하여 작업공정을 단축시킬수 있는 알루미늄박의 피막 형성방법을 제공하는데 있다.The present invention has been made in order to improve the various problems as described above, the object is to form an Al 2 O 3 passive film on the edge of the aluminum foil susceptible to corrosion and over-corrosion in the corner during electrolytic etching operation It is to provide a film forming method of aluminum foil that can prevent the occurrence, and eliminate the need for a separate post-treatment work such as removing the film to shorten the work process.
상기 목적을 달성하기 위한 기술적인 수단으로서 본 발명은, 티타늄 및 백금으로 형성된 귀금속 전극이 내삽되는 스폰지로된 부도체물질에 부동태 피막용액을 일정량 공급토록하며,상기 부동태 피막용액이 공급되는 양측 부도체 물질 사이에는 알루미늄박의 양단 모서리 부분이 접촉하여 엔드리스 타입으로 통과되도록 하고 상기 알루미늄박과 귀금속 전극을 각각 양전위와 음전위에 인가시켜 알루미늄박 양측 모서리에 부동태 피막을 형성토록 하는 것을 특징으로 하는 전해 콘덴서용 알루미늄박의 부식방지 피막형성방법을 마련함에 의한다.As a technical means for achieving the above object, the present invention is to supply a certain amount of the passivating film solution to the non-conductive material made of titanium and platinum is a non-conductive material of the sponge interpolated with a precious metal electrode, between the two non-conducting material supplied with the passivating film solution The aluminum foil for an electrolytic capacitor, wherein both edge portions of the aluminum foil are in contact with each other to pass through in an endless type, and the passivation film is formed on both sides of the aluminum foil by applying the aluminum foil and the precious metal electrode to the positive potential and the negative potential, respectively. By providing a method for forming an anti-corrosion coating.
첨부된 도면을 기초하여 본 발명의 바람직한 실시예를 설명하면 다음과 같다.When explaining the preferred embodiment of the present invention based on the accompanying drawings as follows.
도면은 본 발명에 따른 전해콘덴서용 알루미늄박의 양측 모서리에 부식방지 피막을 형성시키는 과정을 도시한 개략도로서 귀금속전극(20)(Noble Metal Electrode)을 삽입시킨 부도체물질(30)내측으로 알루미늄박(10)의 모서리 일정부분을 통과 진행시키는데 이때 상기 알루미늄박(10)의 표면에 부동태피막을 생성시킬수 있는 용액(40)을 일정량 계속 공급하고, 알루미늄박(10)과 귀금속전극(20)에는 각각 양전위와 음전위를 인가시키게 된다.Figure is a schematic diagram showing a process of forming a corrosion-resistant coating on both edges of the aluminum foil for electrolytic capacitor according to the present invention, the aluminum foil (inner) into the non-conductive material 30 into which the noble metal electrode 20 (Noble Metal Electrode) is inserted; Proceeds through a certain portion of the corner of 10) At this time, a constant amount of a solution 40 capable of producing a passivation film on the surface of the aluminum foil 10 is continuously supplied, the positive electrode to the aluminum foil 10 and the precious metal electrode 20, respectively The upper and negative potentials are applied.
상기 피막형성반응이 진행되면서 알루미늄(10)은 계속적으로 앤드리스타입(Endless Type)으로 통과되어 과다부식이 발생되기 쉬운 모서리부분의 일정부위에 피막형성을 이루게 된다.As the film forming reaction proceeds, the aluminum 10 continuously passes through an endless type to form a film at a predetermined portion of the corner where excessive corrosion is likely to occur.
본 발명의 피막형성시 사용되는 알루미늄박(10)은 음극(Anode)으로 작용되며 상기 귀금속전극(20)은 티타늄(Ti)이나 백금(Pt) 또는 카본등의 캐소드(Cathode)로 작용되고, 상기 부도체 물질(30)은 스폰지나 폴리머 등이 적용되어 부동태 피막용액이 용이하게 흡수 될 수 있도록 한다.The aluminum foil 10 used in forming the film of the present invention serves as an anode and the noble metal electrode 20 serves as a cathode such as titanium (Ti), platinum (Pt), or carbon. The non-conductive material 30 may be applied with a sponge or a polymer so that the passive coating solution can be easily absorbed.
상기와 같이 알루미늄박의 전해 에칭 작업 전에 귀금속전극이 내삽된 부도체 물질 사이를 통과시켜 알루미늄박(10)의 모서리 부위에 Al2O3부동태피막을 형성시킴으로서, 알루미늄박(10)의 모서리부분에 과다한 전류가 흘러 과도부식이 일어나는 것을 막을 수 있고, 알루미늄박(10)과 알루미늄 부동태피막(Al2O3)간의 접합이 우수하게 되어 크레비스커로션이 발생 과다부식으로 진행되는 것을 방지할 수 있으며, 또한 피막제거와 같이 별도의 후처리작업을 하지 않아도 되는 공정단축의 효과를 얻을 수 있다.As described above, an Al 2 O 3 passivation film is formed at the corners of the aluminum foil 10 by passing through the non-conductive material in which the noble metal electrode is intercalated before the electrolytic etching operation of the aluminum foil, thereby excessively at the corners of the aluminum foil 10. It is possible to prevent excessive corrosion from occurring due to the flow of current, and excellent bonding between the aluminum foil 10 and the aluminum passivation film (Al 2 O 3 ) makes it possible to prevent the crevices from occurring due to excessive corrosion. It is possible to obtain the effect of process shortening, which does not require any post-treatment work such as removing the film.
또한 본 발명은 또 다른 실시예로 전해콘덴서 작업공정중의 와인딩(Winding)공정에서 슬리터(Slitter) 단면부위의 사전화상장치로 사용 적용시킴으로서 재화성(Aging)시 발생하는 가스(Gas, Bubble)로 인한 불량율을 줄일 수 있도록 한다.In another embodiment, the present invention is used as a pre-imager of the slitter cross-section in the winding process of the electrolytic capacitor working process (Gas, Bubble) generated during ashing (Gas, Bubble) To reduce the defective rate.
이때, 와인딩기이 오픈상태에서 알루미늄화성박의 롤러(Roller)이송중에 슬리터 단면을 화상시켜 주어 밀봉작업 후, 재화성시의 케이스 내부에 가스가 발생되는 것을 줄일 수 있어 불량율을 감소시킬 수 있는 것이다.At this time, the winding machine burns the cross section of the slitter during the roller transfer of the aluminum chemical foil in the open state, thereby reducing the generation of gas in the case during the reworking and reducing the defective rate.
이상과 같이 본 발명에 따른 알루미늄박의 부식방지 피막 형성방법에 의하면, 부식에 취약한 알루미늄박의 모서리부분에 Al2O3부동태피막을 형성시켜 전해에칭작업시 알루미늄박의 모서리부분에 과다부식이 발생되는 것을 방지할 수 있음은 물론 피막 제거와 같은 별도의 후처리 작업을 삭제하여 작업공정을 단축시킬수 있는 우수한 효과가 있는 것이다.As described above, according to the method for forming an anti-corrosion coating of aluminum foil according to the present invention, by forming an Al 2 O 3 passivation film on the edge of the aluminum foil susceptible to corrosion, excessive corrosion occurs at the edge of the aluminum foil during electrolytic etching. It can be prevented, of course, there is an excellent effect that can shorten the work process by deleting a separate post-treatment work such as removal of the film.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940014636A KR0128550B1 (en) | 1994-06-24 | 1994-06-24 | Anti-etching method of aluminum foil for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940014636A KR0128550B1 (en) | 1994-06-24 | 1994-06-24 | Anti-etching method of aluminum foil for electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960002396A KR960002396A (en) | 1996-01-26 |
| KR0128550B1 true KR0128550B1 (en) | 1998-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940014636A KR0128550B1 (en) | 1994-06-24 | 1994-06-24 | Anti-etching method of aluminum foil for electrolytic capacitor |
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| KR (1) | KR0128550B1 (en) |
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| KR102437860B1 (en) * | 2020-03-09 | 2022-08-30 | 김태영 | Apparatus for extracting natural starch from plant and extracting method thereof |
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1994
- 1994-06-24 KR KR1019940014636A patent/KR0128550B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR960002396A (en) | 1996-01-26 |
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