JP6424354B2 - Method of manufacturing metal separator for fuel cell - Google Patents

Description

The present invention relates to a method for producing a metal separator for a fuel cell, in which a coating layer containing a polymer resin is formed on the surface of a metal plate or other metal object.

  In order to enhance the corrosion resistance, conductivity and decorativeness of a metal object such as a metal plate, a polymer resin layer is often formed on the surface. In such a method of producing a metal target, there is a demand for a method in which resin layers are laminated at a uniform density, brought into close contact with the surface of the metal target, and suitable for mass production.

  As an example, when mentioning a polymer electrolyte fuel cell (PEFC), this is a reaction of hydrogen gas of the fuel with oxygen of the oxidant to obtain electric energy. This fuel cell is a stack of many single cells as follows. That is, a single cell has an MEA (Membrane Electrode Assembly: electrode / membrane assembly) composed of a polymer electrolyte membrane and a pair of porous electrodes (porous support layer + catalyst layer) adhered to both sides, Both sides thereof are sandwiched by a pair of separators in which flow paths for supplying fuel or oxidant are formed. The separator has a current collecting function and a function of supplying a fuel or an oxidant (a cathode side separator further has a function of discharging a reaction product), in addition to the function as a mechanical strength member at the time of lamination. Separators are roughly classified into carbon-based and metal-based from the viewpoint of the material.

  Carbon-based separators include those obtained by machining a graphite block, carbon resin molded articles, and expanded graphite molded articles. However, these have problems such as high cost, a large number of machining steps, or fragile.

  The metal separator has the features of high conductivity, thermal conductivity, mechanical strength, and impermeability of hydrogen gas. Furthermore, since the machining for forming the flow path of the raw material fluid is easy, the manufacturing cost can be reduced. And, as a promising material that can be thinned, it is mainly developed mainly for metal separators using austenitic stainless steel. However, metal separators have the problem of low corrosion resistance.

  As a means for solving this, a method of forming a conductive polymer film on the surface of a metal separator, a method of forming a corrosion-resistant metal coating layer such as gold, platinum plating and the like are taken. For example, Patent Document 1 discloses a metal separator in which a metal base obtained by press-forming a channel is coated with a highly adhesive coating layer. According to this, it is said that peeling of a coating layer does not occur easily, and corrosion of a metal substrate can be prevented.

  Further, in Patent Document 2, a corrosion resistant metal layer is provided on the outer surface of the intermediate metal layer which is easy to press-process and form the flow channel, and the surface of the metal layer is covered with a conductive agent and a resin binder. A layered metal separator is disclosed. According to this, it is supposed that the corrosion resistance of the metal separator can be maintained.

  Further, Patent Document 3 discloses a separator structure in which a conductive flow channel plate and a metal flat plate are superimposed.

JP, 2000-243408, A Unexamined-Japanese-Patent No. 2003-272659 JP 2005-294155 A

  When the coating layer containing a synthetic resin is provided on the surface of the metal separator, the adhesion becomes a problem. If a thermocompression-bonding press is used to improve adhesion, stress (strain) from the press may remain on the metal plate, and stress corrosion cracking may occur due to long-term use. In addition, if sufficient adhesion can not be obtained, the coating layer may peel off.

  SUMMARY OF THE INVENTION The present invention provides a method for producing a polymer resin layer on a surface of a metal object without causing residual stress on the metal object.

  The present invention further provides a method capable of uniformly adhering the resin layer.

  Furthermore, the present invention provides a method for producing a resin coating layer suitable for mass production.

  According to the method of the present invention, a method of producing a coating layer on the surface of a metal object forms a coating layer containing a resin on at least a part of the surface of the metal object, and then uses a fluid to coat the surface of the metal object. The coating layer is cured by isostatic pressing.

  According to the present invention, since the coating layer containing the resin on the surface of the metal object is cured by isotropic pressure using a fluid, that is, by pressing with the same pressure from all directions, pressure is applied to the metal object. The coating layer can be brought into intimate contact with the surface of the metal object without causing any residual stress and uniformly.

  In the case where the covering layer is a dense layer or the like, the covering layer on the surface of the metal object can be directly pressurized with fluid.

  Preferably, the metal object is placed in a thin film pack, the inside of the pack is degassed, and then the coating layer is isostatically pressurized with fluid from the outside of the pack. In this case, a release film may be interposed between the metal object and the pack.

  Both thermosetting resins and thermoplastic resins can be used. When a coating layer is formed using a thermosetting resin, it is pressurized while it is heated. When a coating layer is formed using a thermoplastic resin, it is isostatically pressurized and heated, and then rapidly cooled.

  In the case where the coating layer has conductivity, the coating layer is configured to contain a conductive material in addition to the polymer resin. By adjusting the content of the conductive material, the covering layer can be a dense layer or a porous layer.

  There are various aspects of the metal object and the covering layer. In one aspect, the metal object is a metal plate, and a dense covering layer is formed on at least one surface thereof. In another aspect, the metal object is a metal plate, and a dense covering layer is formed on both sides thereof. In still another aspect, the metal object is a metal plate, the covering layer is a dense corrosion resistant layer covering at least one surface of the metal plate, and a frame layer surrounding the periphery of the corrosion resistant layer is formed on the corrosion resistant layer . In still another aspect, the metal object is a metal plate, a dense covering layer is formed on at least one surface, a porous layer is formed on at least a part of the surface of the covering layer, the covering layer and the porous layer The layers are simultaneously isostatically pressed. In another aspect, the metal object is a corrugated metal plate.

  The manufacturing method according to the present invention suitable for mass production is a metal plate in which a metal object is a coating layer formed of a resin, and a plurality of metal plates are spaced apart in a thin film pack and adjacent metal plates Fold the pucks so that they overlap, put a spacer between the pucks that wrap adjacent metal plates, put a plurality of stacked metal plates with the spacer interposed in the pressure container together with the packs, and apply the fluid isostatically Press down. The spacer is preferably porous.

  According to this invention, the metal separator for fuel cells can be produced by the above-mentioned method.

  An apparatus for producing a coating layer on the surface of a metal object according to the present invention comprises a pressure vessel containing a metal object having a coating layer containing a resin formed on at least a part of the surface, and a pressurized fluid. And a pressure pump for pressurizing and introducing the pressurized fluid in the storage tank into the pressure resistant container. It is preferable to further include a vacuum pump for providing a negative pressure in the pressure resistant container.

  In order to produce a coating layer on the surface of a metal object using this apparatus, the metal object is placed in a thin film pack, the pack containing the metal object is placed in a pressure container, and stored in the pressure container. The pressurized fluid in the tank is pressurized by a pressurizing pump and introduced. Alternatively, the metal object is put in a thin film pack, the pack containing the metal object is put in a pressure container, the inside of the pressure container is deaerated by a vacuum pump, and the inside of the pack is also deaerated, after which The pressurized fluid in the storage tank is pressurized by a pressurizing pump and introduced into the container. In this case, a release film may be interposed between the metal object and the pack.

It is a perspective view which shows an example of the formation by the Example of this invention. FIG. 2 is an enlarged sectional view taken along line II-II of FIG. It is a perspective view which shows an example of the other formed article by the Example of this invention. FIG. 4 is an enlarged cross-sectional view taken along line IV-IV of FIG. 3; FIG. 16 is a part of an enlarged cross-sectional view corresponding to FIG. 2 showing an example of another formed article. FIG. 16 is a part of an enlarged cross-sectional view corresponding to FIG. 2 showing an example of another formed article. FIG. 16 is a part of an enlarged cross-sectional view corresponding to FIG. 2 showing an example of another formed article. FIG. 7 is a perspective view showing an example of still another formed article according to the embodiment of the present invention. FIG. 9 is an enlarged sectional view taken along line IX-IX in FIG. 8; FIG. 10 is a perspective view showing an example of still another formed article according to the embodiment of the present invention. The XI-XI line of FIG. 10 shows a part of an enlarged sectional view. It is an expanded sectional view equivalent to FIG. 11 which shows the further another example of a formation. It is an expanded sectional view equivalent to FIG. 11 which shows the further another example of a formation. It is an expanded sectional view equivalent to FIG. 11 which shows the further another example of a formation. It is an expanded sectional view equivalent to FIG. 11 which shows the further another example of a formation. FIG. 10 shows a part of a system suitable for mass production and is a perspective view showing a process of forming a band pack. The state where the semi-formed product is housed in the formed band-like pack is shown. A state is shown in which the band-shaped pack is folded and stacked for each semi-formed product. It is a systematic diagram showing the system which hardens a resin coating layer by isostatic pressure.

  The example of the formation obtained by producing a coating layer on the surface of a metallic subject is described. The metal object is a metal plate.

  The formed product 10A shown in FIG. 1 and FIG. 2 is obtained by producing a coating layer (anticorrosion layer) 12A on one surface of a rectangular metal flat plate 11A.

  In the formed product 10B shown in FIGS. 3 and 4, a coating layer (corrosion resistant layer) 12B is produced on one surface of a flat metal plate 11B curved in one direction.

  The formed product 10C shown in FIG. 5 has a covering layer (one surface of the groove and the ridge) of a flat metal plate 11C in which grooves 13A extending in one direction and ridges (or ribs) 13B are alternately formed. Corrosion-resistant layer 12C is produced.

  The formed product 10D shown in FIG. 6 covers one surface (the surface of the groove and the ridge) of a flat metal plate 11D in which grooves 14A and ridges (or ribs) 14B having a trapezoidal cross section extending in one direction are alternately formed. A layer (corrosion resistant layer) 12D is formed.

  In a formed product 10E shown in FIG. 7, a covering layer (decorative layer) 12E having a pattern of irregularities is formed on the surface of a metal flat plate 11E.

  In a formed product 10F shown in FIGS. 8 and 9, a covering layer (anticorrosion layer) 12F having a frame 12f is formed on one surface of a rectangular metal flat plate 11F. The frame 12f is rectangular, is formed over the entire periphery of the covering layer 12F, and protrudes beyond the flat portion of the covering layer 12F.

  A formed product 10G shown in FIGS. 10 and 11 has a covering layer (corrosion resistant layer) 12G having a large number of ribs 15A and a frame 12g formed on one surface of a rectangular metal flat plate 11G. The frame 12g is rectangular and provided in a projecting shape (convex line) around the entire periphery of the covering layer 12G. The large number of ribs 15A are provided in parallel at equal intervals in the frame 12g, and a space is provided between the both ends thereof and the frame 12g. Grooves (channels) 15B are formed between the adjacent ribs 15A and between the ribs 15A and the frame 12g. The height of the rib 15A is the same as the height of the frame 12g.

  Such a formed product 12G can be used, for example, as a separator for a solid polymer electrolyte fuel cell (PEFC) (in FIG. 10, the inlet and outlet for the cathode gas, anode gas or cooling water are omitted) ing). In this case, the rib 15A can take various forms such as a serpentine shape.

  The formed articles 10A to 10G described above form the coating layers 12A to 12G containing the polymer resin on one surface of the flat metal plates 11A to 11G, respectively, and then the coating layer on the surface of the metal plate is used as a fluid. It is produced by curing the coating layer by using isostatic pressure.

  The flat metal plates 11A to 11G preferably have small surface tensile residual stress. The metal flat plates 11A to 11G are preferably a metal consisting of one or more of inconel, nickel, gold, silver and platinum, or a metal obtained by plating the metal on an austenitic stainless steel plate, or a clad material. Corrosion resistance can be improved by using these metals.

  For the polymer resin of the covering layers 12A to 12G, either a thermosetting resin or a thermoplastic resin can be used. Examples of the polymer resin include phenol resin, epoxy resin, melamine resin, rubber resin, furan resin, vinylidene fluoride resin and the like.

  When the cover layer is made conductive, the cover layers (including ribs and frames) 12A to 12G are configured to include a mixture of a conductive material (preferably a carbon-based conductive material) and a polymer resin. By mixing a carbon-based conductive material with the polymer resin, high conductivity can be imparted to the polymer resin, and the corrosion resistance of the polymer resin can be improved. When the content of the polymer resin is increased to ensure conductivity and densify (do not allow gas and liquid to pass or permeate), it becomes a corrosion resistant layer.

  As the carbon-based conductive material, graphite, carbon black, diamond-coated carbon black, silicon carbide, titanium carbide, carbon fibers, carbon nanotubes, etc. can be used.

  As an example, carbon-based conductive material powder, thermosetting resin powder and volatile solvent are kneaded to form a paste, and this paste is used to form a uniform thickness by roll coating, screen printing, spray coating, stamping, squeezing method, etc. Forming a thin film-like coating layer or a coating layer with a frame or a rib on a metal plate, drying the coating layer (volatilizing the solvent), and then placing the metal plate with the coating layer in a pressure container; A pressurized fluid (water, oil, etc.) is introduced into the pressure container, isostatic pressing and heating, and the resin is cured. When the covering layer is a dense layer, it may be in direct contact with the fluid. Alternatively, the entire metal plate on which the covering layer is formed is placed in a soft thin rubber pack (or resin film pack), the inside of the pack is evacuated to a vacuum, and then the rubber pack is placed in a pressure container (pressure resistance The rubber pack may be degassed in the container), a pressurized fluid is introduced into the container and isostatic pressing to cure the resin. It is preferable to interpose a release film of fluorine resin between the metal plate and the rubber pack.

  The material of the thin film (film) pack may be any material that can withstand pressure and does not permeate the fluid, and in the case of rubber, acrylic rubber (140 to 150 ° C.), silicone rubber (180 to 200 ° C.), fluoro rubber > 200 ° C.), and if it is a resin, polyphenylene sulfide, polyethylene naphthalate, polyarylene amide, polyimide, polyether, ether ketone and the like can be used.

  When a coating layer is formed using a thermosetting resin, the fluid is pressurized and heated by the fluid. When the covering layer is formed using a thermoplastic resin, it is preferable to apply isostatic pressing and heating with a fluid (to the extent that the covering layer is not deformed) and then rapidly cool it.

  As described above, after the coating layer is formed on the surface of the metal plate, the coating layer is cured by isostatic pressing using a fluid, so that the coating layer adheres to the metal plate without causing any residual stress. And the covering layer can be uniformly adhered.

  In a formed product 10H shown in FIG. 12, a covering layer (corrosion resistant layer) 12H having a frame 12h is formed on one surface of a flat metal plate 11H, and on the covering layer 12H, a large number of pores having the same height as the frame 12h are formed. The texture ribs 16 are provided in parallel at intervals. The porous rib 16 forms a flow path similar to that shown in FIG.

  In a formed product 10J shown in FIG. 13, a covering layer (corrosion resistant layer) 12J having a frame 11j is formed on one surface of a flat metal plate 11J, and many porous layers having the same height as the frame 11j are formed on the covering layer 12J. The ribs 16 are formed in parallel, and the coating layer (corrosion resistant layer) 17 is also formed on the other surface of the flat metal plate 11J.

  In the formed product 10K shown in FIG. 14, the coating layers (corrosion resistant layers) 12K and 17 are formed on both sides of the flat metal plate 11K, and a large number of porous ribs 18 and 19 are parallel on these coating layers 12K and 17. It is formed in The height, width, etc. of the porous ribs 18 and 19 are different.

  In the formed product 10M shown in FIG. 15, the coating layers (corrosion resistant layers) 12M and 17 are formed on both surfaces of the metal flat plate 11M, and a large number of porous ribs 18A having a trapezoidal cross section are formed on these coating layers 12M and 17. , 19A are formed in parallel. The height, width, etc. of the porous ribs 18A and 19A are different.

  The formations 10H to 10M shown in FIGS. 12 to 15 can also be used as a fuel cell separator. Gas or fluid can pass through the porous rib.

  The porous rib can also be configured to include a mixture of a conductive material and a polymer resin. By adjusting the content of the carbon-based conductive material, the fluid resistance (porosity) of the porous rib can be adjusted (controlled). In particular, when a large amount of carbon fiber is mixed, the fluid resistance is reduced (the porosity is increased). Conversely, the fluid resistance can be increased (porosity can be decreased) by increasing the content of the polymer resin.

  Such formations 10H to 10M can also be formed by isostatic pressing with fluid. For example, in the case of using a thermosetting resin, carbon-based conductive material powder (and carbon fiber if necessary), resin powder and volatile solvent are kneaded to form a paste. For this paste, one for the coating layer (corrosion resistant layer) and one for the porous rib are prepared. Then, a pattern of the covering layer is first formed on the metal flat plate by printing, stamping, squeezing, etc., and dried to evaporate the solvent. Next, a pattern of porous ribs is formed on the coating layer by the same method and dried to evaporate the solvent. Put the whole of the flat metal plate on which all the above patterns are formed in a soft thin rubber pack, degas the inside of the rubber pack in vacuum, and then put the rubber pack in a pressure container (or remove it in a pressure container) Note) The heating fluid is introduced into the container, isostatic pressing and heating with the heating fluid, and the resin is cured. In order to make the height of the coating frame and the height (thickness) of the porous rib finally the same height (thickness), depending on the degree of shrinkage during resin curing, these frames and ribs It is preferable to adjust the height (thickness) of the like at the time of pattern production.

  A method for mass production of the various articles described above will be described with reference to FIGS. 16 to 19 using the article 10G shown in FIG. 10 as an example. The formed article 10G is after the covering layer 12G is cured by isostatic pressing. The semi-formed article before curing the resin of the coating layer is shown at 10 g.

  A film (packing) film 31 made of synthetic rubber or synthetic resin is wound around a roll 31A. Further, a release film 32 made of a fluorine-based resin is wound around a roll 32A. These films 31, 32 are drawn out from the rolls 31A, 32A, guided by rollers 33, 34, etc., and folded in half in the width direction so that the center in the width direction is gradually folded back at the lowermost end. The release film 32 is on the inside of the film 31. 10 g of the semi-formed article is put from above into the film 32 which is folded and conveyed in two. The upper end portions in the width direction of the films 31 and 32 are sandwiched by the heat roller 35 and thermally welded. In this manner, an elongated band-like pack 41 can be obtained which wraps a large number of semi-formed products 10g at appropriate intervals. The tip of the pack 41 is sealed in advance by heat welding or the like.

  That is, as shown in FIG. 17, the band-like pack 41 is in close contact with the other side and at both ends (the close contact portion is indicated by double hatching 41A) except for the side which is folded back. A pore 42 for degassing is opened at one end. The degassing hole may be fitted with a one way valve or a non-return valve (passing gas only in the direction of degassing from inside the pack). The semi-formed product 10 g is contained in the pack 41 with an interval. The release film is in direct contact with 10 g of the semi-formed product. The release film 32 may not be in close contact with the film 31 at the portion 41A. The release film may cover the surface of the semi-formed product.

  As shown in FIG. 18, a strip pack 41 in which a large number of semi-formed products 10g are enclosed at intervals is transported by a conveyor 52 and stacked on a stacker table 50. That is, first, the portion containing the first semi-formed product 10g is placed on the table 50, and while the table 50 is lowered slightly, the next semi-formed product 10g is sent out by the conveyor 52. While moving in the backward direction, the portion of the next semi-formed product 10 g is stacked on the portion of the semi-formed product 10 g placed on the table 50. At this time, the porous spacer 51 is inserted between the upper and lower semi-formed products 10g (inserted from the side or the other side of the drawing).

  In this manner, the entire stack is put back in the pressure container (tank) 61 shown in FIG. The pump device 64 draws the inside of the pressure resistant container 61 in vacuum and pressurizes the inside of the heating fluid container 62 or the cooling fluid container 63.

  A resin curing process in the case where the covering layer 12G of the semi-formed product 10 g is a thermosetting resin will be described.

An air pipe is drawn from the pump device 64 to the pressure resistant container 61 and the cooling fluid container 63, and valves 72 and 78 are provided therein. A valve 79 is provided in the liquid pipe between the cooling fluid container 63 and the pressure container 61. A valve 74 is provided in the air pipe disposed in the heating fluid container 62 from the pump device 64, and valves 76 and 75 are provided in the piping between the heating fluid container 62 and the upper and lower portions of the pressure container 61, respectively. The respective vessels 61, 62, 63 are provided with valves 71, 73, 77 for degassing.

  The valves 71, 75, 76, and 79 of the pipe communicating with the pressure container 61 are closed, and only the valve 72 is opened to operate the pump 64 as a vacuum pump. The inside of the pressure container 61 is degassed. As a result, the inside of the strip pack 41 of the stack housed in the pressure resistant container 61 is also degassed through the degassing holes 42 (or one-way valve). The inside of the pack 41 may be evacuated.

  After this, the valve 72 is closed. The heated fluid container 62 contains a heated fluid (oil, water, etc.). The valve 73 is closed and the valves 74 and 75 are opened to operate the pump 64 as a pressure pump. Pressurized air from the pump 64 is pumped into the vessel 62 through the valve 74 to push out the heated fluid in the vessel 62. The heating fluid is delivered to the vessel 61 through the valve 75. When the container 61 is filled with the heating fluid, the inside of the container 61 is kept pressurized (the valve 75 is closed) and left for a predetermined time. Thereby, the covering layer 12G of the semi-formed article 10g in the pack 41 is heated and pressurized, and the resin is cured. Since the porous spacer 51 is interposed between the semi-formed products 10 g in the pack, equal pressure is applied to the surface of the semi-formed product 10 g from all directions by the heating fluid (isotropic pressure). Thus, the covering layer 12G adheres uniformly to the flat metal plate 11G and is cured.

After the covering layer 12G is cured, the valve 76 is opened, the valves 78 and 79 are opened, and the cooling fluid is pushed out of the container 63 by the pump 64 and flows into the container 61 from below. The heated fluid in vessel 61 returns to vessel 62 through valve 76.

  When the cooling fluid is filled in the container 61 to cool the pack 41 and the formed product 10G therein, the valve 71 and the valves 79 and 77 are opened and the fluid is returned to the container 63 through the valve 79 by its own weight.

  In the case of a semi-formed product having a coating layer formed of a thermoplastic resin, the semi-formed product is heated in the pressure container 61 to such an extent that the resin is slightly softened by the heating fluid, and then the cooling fluid is contained in the container 61 It is recommended to introduce and quench rapidly to cure the resin.

  Thereafter, the stack of packs containing the formed product is taken out from the pressure container 61, the fluid on the surface of the pack is cleaned, the pack is opened with a cutter, and the formed product in the inside can be taken out.

  As described above, since a large number of semi-formed products are placed in a band-like pack and isostatic pressing is performed once to cure the resin, the above-described method and system are suitable for mass production.

  The formed article manufactured by the method according to the present invention can be used for fuel cell separators and other applications because the resin coating layer is uniformly adhered to the surface of the metal plate.

Claims (20)

  A coating layer containing a resin is formed on at least a part of the surface of a metal object, and then the coating layer is pressed by applying a fluid to all directions of the coating layer on the surface of the metal object. A method for producing a metal separator for a fuel cell, which is cured to form a coating layer on the surface of the metal object.   The method for producing a metal separator for a fuel cell according to claim 1, wherein the covering layer on the surface of the metal object is directly pressurized in all directions and isotropically with a fluid.   The metal separator according to claim 1, wherein the metal object is placed in a thin film pack, the inside of the pack is degassed, and then the covering layer is pressurized in all directions with a fluid from the outside of the pack. How to make   The method for producing a metal separator for a fuel cell according to claim 3, wherein a release film is interposed between the metal object and the pack.   The metal separator for fuel cells according to any one of claims 1 to 4, wherein a metal object having a coating layer containing a resin formed on at least a part of its surface is supported by a porous spacer in a pressurized fluid. Method.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 5, wherein the covering layer is formed using a thermosetting resin.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 5, wherein the covering layer is formed using a thermoplastic resin.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 7, wherein the covering layer contains a conductive material in addition to the resin.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 8, wherein the covering layer is a dense layer that prevents fluid permeation.   The metal separator for fuel cells according to any one of claims 1 to 8, wherein the metal object is a metal plate, and the dense coating layer for preventing fluid permeation is formed on at least one surface of the metal object. How to make it.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 8, wherein the metal object is a metal plate, and a dense coating layer for preventing fluid permeation is formed on both surfaces thereof. .   The metal object is a metal plate, and the covering layer is a dense corrosion resistant layer covering at least one surface of the metal plate and preventing fluid permeation, and a frame surrounding the periphery of the corrosion resistant layer on the corrosion resistant layer The method for producing a metal separator for a fuel cell according to any one of claims 1 to 8, wherein a layer is formed.   The metal object is a metal plate, and a plurality of the metal plates are spaced apart in a thin film pack, and the pack is folded so that the adjacent metal plates overlap, and the adjacent metal plate is wrapped. 9. A porous spacer is interposed between the plurality of metal plates stacked with the porous spacer interposed therebetween, and the pack and the pack are placed in a pressure container, and fluid is isotropically pressurized with fluid in all directions. The manufacturing method of the metal separator for fuel cells as described in any one.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 8, wherein the metal object is a corrugated metal plate.   The method for producing a metal separator for a fuel cell according to any one of claims 1 to 13, wherein the metal target is a flat metal plate. A thin film pack for containing a metal object having a coating layer containing a resin formed on at least a part of the surface;
A porous spacer supporting the pack containing the metal object;
A pressure vessel containing the pack containing the metal object and the porous spacer;
A storage tank for storing pressurized fluid;
A pressurizing pump for pressurizing and introducing pressurized fluid in the storage tank into the pressure container;
Device order to cure the coating layer of the metal object surface having.   The apparatus according to claim 16, further comprising a vacuum pump for applying a negative pressure in the pack having a vent and the pressure vessel. Place the metal object in a thin film pack,
The pack containing the metal object and a porous spacer for supporting the pack are placed in the pressure container,
Degassing the inside of the pack having the degassing holes and the inside of the pressure container by the vacuum pump;
The pressurized fluid in the storage tank is pressurized by the pressurizing pump and introduced into the pressure resistant container,
A method using the device according to claim 17.   The metal object is a metal plate, the thin film pack is a strip, and a plurality of the metal plates are spaced apart in the thin film pack, and the pack is folded so that the adjacent metal plates overlap. 19. The method according to claim 18, further comprising: inserting the porous spacer between packs enclosing adjacent metal plates, and putting a plurality of metal plates stacked with the porous spacers interposed in the pressure container together with the packs. Method.   The method according to claim 18 or 19, wherein a release film is interposed between the metal object and the pack.

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