BE661799A - Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process - Google Patents

Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process

Info

Publication number
BE661799A
BE661799A BE661799A BE661799A BE661799A BE 661799 A BE661799 A BE 661799A BE 661799 A BE661799 A BE 661799A BE 661799 A BE661799 A BE 661799A BE 661799 A BE661799 A BE 661799A
Authority
BE
Belgium
Prior art keywords
thin metal
metal sheets
varnish
multitude
pierced
Prior art date
Application number
BE661799A
Other languages
French (fr)
Inventor
Marie-Jeanne Bastin-Merkeman
Original Assignee
Acec
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 Acec filed Critical Acec
Priority to BE661799A priority Critical patent/BE661799A/en
Publication of BE661799A publication Critical patent/BE661799A/en
Priority to IT683366A priority patent/IT779980B/en
Priority to LU50784A priority patent/LU50784A1/en
Priority to FR55568A priority patent/FR1476041A/en
Priority to NL6604172A priority patent/NL6604172A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/14—Etching locally
    • 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
    • C23F1/02—Local etching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8817—Treatment of supports before application of the catalytic active composition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8853—Electrodeposition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Description

  

   <Desc/Clms Page number 1> 
 



  PROCEDE DE FABRICATION DE FEUILLES METALLIQUES MINCES,   PERCEES   D'UNE MULTITUDE DE TRES PETITS TROUS ET FEUILLES METALLIQUES MINCES FABRIQUEES SUIVANT
CE PROCEDE. 



   La présente Invention a pour objet un procède de fabrication de feuilles métalliques minces, percées d'une multitude de très petits trous. De telles feuilles sont utilisées par exemple comme électrodes dans des piles à combustibles. 



   L'invention est caractérisée en ce qu'on recouvre une feuille métallique mince d'une couche d'un vernis photosensible, qu'on sensibilise cette couche de vernis photo- 

 <Desc/Clms Page number 2> 

 sensible sur un des côtés de la feuille suivant un gabarit de perçage, qu'on enlève le vernis photo-sensible aux   en-..   droits non-sensibilisés pour y mettre le métal à nu, qu'on attaque le métal mis à nu à l'aide d'une eau-forte et   qu'on .   enlève ensuite le vernis recouvrant les endroits sensibilises. 



   Pour obtenir des résultats reproductibles   c'est-   à-dire pour obtenir des petits trous de même diamètre dans toute la feuille, l'attaque à l'eau-forte est remplacée par une électrolyse dans laquelle la feuille métallique mince sert d'anode. Pour cette électrolyse l'eau-forte peut servir d'électrolyte, mais à très forte dilution ; de   préfé-   rence l'eau-forte est remplacée par un électrolyte neutre ou même alcalin. 



   Le gabarit   de 'perçage de   la feuille métallique peut être établi   à   grande échelle par exemple sur une feuille claire à l'aide d'une encre ou d'un pigment sombre et projeté par une optique appropriée sur la couche photosensible. Il est également possible de dessiner le gabarit de perçage à l'aide d'une encre ou d'un pigment clair sur un support foncée d'en faire un négatif photographique à échelle réduite et d'appliquer ce négatif directement sur la couche photo-sensible en l'exposant à une lumière appropriée,
L'invention est expliquée ci-dessous par rapport à un exemple d'une forme d'exécution. Une feuille de nickel très mince d'environ 0,05   mm   d'épaisseur est recouvert d'un vernis photo-sensible.

   Un gabarit de perçage constitué par 

 <Desc/Clms Page number 3> 

 
 EMI3.1 
 une Multitude de pointa noire de .e.e grandeur est 4eaa1 nez l'encre noire, à une échelle très jurande, sur une renie 
 EMI3.2 
 blanche. De ce gabarit à grande échelle eat produit un 
 EMI3.3 
 positif aux dimensions voulues à l'aide de  ductlo# phem- 
 EMI3.4 
 graphiques. Ce positif est appliqué sur la couche photo- 
 EMI3.5 
 sensible recouvrant la feuille de nickel et exffld à la lumière ultra-violette. Après d'veloppe88nt de l'I-oe mi obtenue sur la feuille de nickel, le rensis photo-eea81.1. aux endroits non-eensibl11e4. est dissout afin que le )w<tw3L nu y apparaisse. La feuille ainsi prépara eet plume" de  une eau-forte ) par exemple de l'acide rittrlqueb t,1I...-to1t'te attaque le nickel et pratique les trous ..1,..' le ¯-.nt. 



  Ce procède convient dana loua les o  où me ,"'1- nlatireaeat faible est 8Wtti8an%e, Par tout # ai 1'%ié tre obtenir des feuilles 84tal11,.a 81.... pel'C4ea 4'ma MIh t1 tu.se de troua correspondant eaxasteaext am gabarit de imr. qaga pll'par4. la feuille de D1ob1. ftO¯".t'te de IL  <WM< photo-sonstblog, prépaie tom 44oa% olros" eAr Jal'" do dans un 41tot"lytt et bmmh4o *   WA040 4a*m  np cuit lù..an.que, cowm '1.ectl'Oll'". - pM' *Ul4+* 1"--tort# en uae concentration gtl'tMMft't fttblt   et rente un électrolyte MU'" - %Le  81-.1t".

   Da 'sMae t faut 11 1Q oji'! I4e pulest pm ooaU1IM:t- ...1"t l'attaque du bêtal au loaelpl'" où l* olil'a4'. 'l1! 1%41 trolffl bat 1a%o ro*pu, Cela peut %%m ¯bJ- puta.eaaea 4t*èt m .1.Oil'olJ'. tomtttut 1At- vae .000¯tt- 4%m 'Ml w1wa1> à nautro "'1" le  Pilé tu ??1 si gaz   mtg%4 

 <Desc/Clms Page number 4> 

 sa concentration doit être   suffisamment   faible pour que l'attaque ne puisse pas progresser à un rythme comparable à celui de l'électrolyse au moment où le courant est inter-   rompu.   Les troua obtenue par électrolyse ont la forme de petite troncs de cône avec les grandes bases   posées   sur le côté où a été disposée la couche sensibilisée.

   Ils sont tous de même dimension.   Apres   ce traitement, la couche de   vernis     photo-sensible   recouvrant encore le métal est   en-   levée. 



   Il est possible de produire ainsi par exemple des feuilles   métalliques     minces   percées de plus de 100 000 trous par cm2 avec des   diamètre@   inférieurs à 0,01 mm et répartis d'une   manière     prédéterminée   avec une grande précision, De   telles   feuilles   conviennent   parfaitement   comme   électrodes pour des piles à combustibles. Dans ce but, elles peuvent aussi, être recouvertes d'un catalyseur.



   <Desc / Clms Page number 1>
 



  PROCESS FOR THE MANUFACTURING OF THIN METAL SHEETS, DRILLED WITH A MULTITUDE OF VERY SMALL HOLES AND THIN METAL SHEETS MADE FOLLOWING
THIS PROCESS.



   The present invention relates to a process for manufacturing thin metal sheets, pierced with a multitude of very small holes. Such sheets are used, for example, as electrodes in fuel cells.



   The invention is characterized in that a thin metal sheet is covered with a layer of a photosensitive varnish, this layer of photo varnish is sensitized.

 <Desc / Clms Page number 2>

 sensitive on one of the sides of the sheet following a drilling template, that the photo-sensitive varnish is removed from the non-sensitized places to expose the metal there, that the exposed metal is attacked at using etching and that. then removes the varnish covering the sensitized areas.



   To obtain reproducible results, that is to say to obtain small holes of the same diameter throughout the sheet, the etching is replaced by an electrolysis in which the thin metal sheet serves as an anode. For this electrolysis the strong water can be used as electrolyte, but with very strong dilution; preferably the etching is replaced by a neutral or even alkaline electrolyte.



   The metal foil piercing template can be established on a large scale eg on a light foil using dark ink or pigment and projected by suitable optics onto the photosensitive layer. It is also possible to draw the drilling template using light ink or pigment on a dark medium to make it a small scale photographic negative and apply this negative directly to the photo layer. sensitive by exposing it to appropriate light,
The invention is explained below with respect to an example of an embodiment. A very thin nickel foil approximately 0.05 mm thick is covered with a photo-sensitive varnish.

   A drilling template consisting of

 <Desc / Clms Page number 3>

 
 EMI3.1
 a Multitude of black pointa of .e.e size is 4eaa1 nose black ink, on a very jurand scale, on a renie
 EMI3.2
 white. From this large-scale template is produced a
 EMI3.3
 positive to the desired dimensions using ductlo # phem-
 EMI3.4
 graphics. This positive is applied to the photo-
 EMI3.5
 sensitive coating the nickel foil and exffld in ultraviolet light. After envelope88nt of the I-oe mi obtained on the nickel foil, the rensis photo-eea81.1. in non-sensitive places4. is dissolved so that the) w <tw3L nu appears there. The foil thus prepared and feather "of an etching) for example acid rittrlqueb t, 1I ...- to1t'te attacks nickel and makes holes ..1, .. 'the ¯-.nt.



  This process is suitable dana loua where me, "'1- nlatireaeat weak is 8Wtti8an% e, By all # have 1'% ié tre get leaves 84tal11, .a 81 .... pel'C4ea 4'ma MIh t1 tu.se de troua corresponding eaxasteaext am template of imr. qaga pll'par4. the sheet of D1ob1. ftO¯ ".t'te de IL <WM <photo-sonstblog, prepaid tom 44oa% olros" eAr Jal '"do in a 41tot "lytt and bmmh4o * WA040 4a * m np cooked lù..an.que, cowm '1.ectl'Oll'". - pM '* Ul4 + * 1 "- wrong # in uae concentration gtl'tMMft't fttblt and yields an electrolyte MU'" -% Le 81-.1t ".

   Da 'sMae t need 11 1Q oji'! I4e pulest pm ooaU1IM: t- ... 1 "t the attack of the beta at loaelpl '" where l * olil'a4'. 'l1! 1% 41 trolffl beats 1a% o ro * pu, This can %% m ¯bJ- puta.eaaea 4t * and m .1.Oil'olJ '. tomtttut 1At- vae .000¯tt- 4% m 'Ml w1wa1> to nautro "' 1" le Pilé tu ?? 1 if gas mtg% 4

 <Desc / Clms Page number 4>

 its concentration must be low enough so that the attack cannot progress at a rate comparable to that of electrolysis when the current is interrupted. The holes obtained by electrolysis have the shape of small truncated cones with the large bases placed on the side where the sensitized layer has been placed.

   They are all the same size. After this treatment, the layer of photosensitive varnish still covering the metal is removed.



   It is thus possible to produce, for example, thin metal sheets drilled with more than 100,000 holes per cm2 with diameters of less than 0.01 mm and distributed in a predetermined manner with high precision. Such sheets are ideally suited as electrodes. for fuel cells. For this purpose, they can also be covered with a catalyst.

Claims (1)

R E S U M E. ABSTRACT. Procédé de fabrication de feuilles métalliques minces$ percées d'une multitude de très petite trous, oa.. ractérisé en ce qu'on recouvre la feuille métallique mince d'une couche de vernis photo-sensible, qu'on sensibilise cette couche de vernis photo-sensible sur un des cotés de la feuille suivant un gabarit de perçage qu'on enlève ,)le vernis photo-sensible aux endroits non-sensibilisés pour y mettre le métal à nu, qu'on attaque le métal mis à nu à l'aide 3'une eau-forte et qu'on enlève ensuite le vernis recouvrant les endroits sensibilisés. Manufacturing process of thin metal sheets $ pierced with a multitude of very small holes, oa .. acterized in that the thin metal sheet is covered with a layer of photosensitive varnish, that this layer of varnish is sensitized photo-sensitive on one side of the sheet following a drilling template that is removed,) the photo-sensitive varnish in non-sensitized places to expose the metal, that we attack the exposed metal to the 'Help 3' an etching and then remove the varnish covering the sensitized areas. ' 2.. Procède selon 1, caractérisé en ce que l'attaque à l'eau-forte est remplacée par une électrolyse, la feuille métallique minet servant d'anode. '2 .. Method according to 1, characterized in that the etching is replaced by electrolysis, the metallic foil serving as an anode. 3. Procédé selon 2, caractérisé en ce que l'électrolyte est une solution d'un sel neutre ou alcalin. 3. Method according to 2, characterized in that the electrolyte is a solution of a neutral or alkaline salt. 4. Procédé selon 1, 2 ou 3, caractérisé en ce que le gabarit de perçage est obtenu par un procédé photographique à partir d'un gabarit à très grande échelle. 4. Method according to 1, 2 or 3, characterized in that the drilling template is obtained by a photographic process from a template on a very large scale. 5. Feuille métallique mince fabriquée suivant un des procédés 1, 2, 3 ou 4 ci-dessus. 5. Thin metal foil manufactured according to one of the methods 1, 2, 3 or 4 above.
BE661799A 1965-03-30 1965-03-30 Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process BE661799A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE661799A BE661799A (en) 1965-03-30 1965-03-30 Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process
IT683366A IT779980B (en) 1965-03-30 1966-03-28 PROCEDURE FOR THE PRODUCTION OF THIN METALLIC SHEETS WITH A MULTITUDE OF VERY SMALL HOLES AND THIN METALLIC SHEETS MANUFACTURED ACCORDING TO THIS PROCEDURE
LU50784A LU50784A1 (en) 1965-03-30 1966-03-29 Process for the manufacture of thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced by this process
FR55568A FR1476041A (en) 1965-03-30 1966-03-30 Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process
NL6604172A NL6604172A (en) 1965-03-30 1966-03-30 Method for manufacturing thin, perforated metal plates, as well as the plates obtained by using this method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE661799A BE661799A (en) 1965-03-30 1965-03-30 Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process

Publications (1)

Publication Number Publication Date
BE661799A true BE661799A (en) 1965-09-30

Family

ID=3847414

Family Applications (1)

Application Number Title Priority Date Filing Date
BE661799A BE661799A (en) 1965-03-30 1965-03-30 Process for manufacturing thin metal sheets, pierced with a multitude of very small holes and thin metal sheets produced according to this process

Country Status (5)

Country Link
BE (1) BE661799A (en)
FR (1) FR1476041A (en)
IT (1) IT779980B (en)
LU (1) LU50784A1 (en)
NL (1) NL6604172A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321977A1 (en) * 1975-08-26 1977-03-25 Int Nickel Ltd PERFORATED METAL SHEET MANUFACTURING PROCESS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677271A1 (en) * 1991-06-04 1992-12-11 Commissariat Energie Atomique Process for the production of microporous membranes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321977A1 (en) * 1975-08-26 1977-03-25 Int Nickel Ltd PERFORATED METAL SHEET MANUFACTURING PROCESS

Also Published As

Publication number Publication date
LU50784A1 (en) 1966-05-31
NL6604172A (en) 1966-10-03
IT779980B (en) 1967-07-15
FR1476041A (en) 1967-04-07

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