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A method of manufacturing the separator of the proton exchange fuel cell. In a cell stack of a proton exchange fuel cell, the cell stack composed by laminating a plurality of unit cells and a plurality of separators, each of the unit cells composed of an anode electrode, a cathode electrode and a so

A method of manufacturing the separator of the proton exchange fuel cell. In a cell stack of a proton exchange fuel cell, the cell stack composed by laminating a plurality of unit cells and a plurality of separators, each of the unit cells composed of an anode electrode, a cathode electrode and a solid polymer electrolytic membrane arranged between the anode and cathode electrodes, each of the separators arranged between the unit cells, respectively, the method of manufacturing the separator of the proton exchange fuel cell, includes the steps of, preparing step for preparing raw material for the separator, the raw material composed of alloy material including light metal, such as aluminum or magnesium, as a main component, and forming step for forming the separator from the raw material by die casting.

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A method of manufacturing the separator of the proton exchange fuel cell. In a cell stack of a proton exchange fuel cell, the cell stack composed by laminating a plurality of unit cells and a plurality of separators, each of the unit cells composed of an anode electrode, a cathode electrode and a so

A method of manufacturing the separator of the proton exchange fuel cell. In a cell stack of a proton exchange fuel cell, the cell stack composed by laminating a plurality of unit cells and a plurality of separators, each of the unit cells composed of an anode electrode, a cathode electrode and a solid polymer electrolytic membrane arranged between the anode and cathode electrodes, each of the separators arranged between the unit cells, respectively, the method of manufacturing the separator of the proton exchange fuel cell, includes the steps of, preparing step for preparing raw material for the separator, the raw material composed of alloy material including light metal, such as aluminum or magnesium, as a main component, and forming step for forming the separator from the raw material by die casting. as a thickness of not more than 1 micron. 13. A composite metal panel according to claim 11, wherein said bonding layer comprising zinc or tin is applied by a zincate treatment or a stannate treatment respectively. 14. A composite metal panel according to claim 1, wherein the corrugated aluminium stiffener sheet is made from said aluminium brazing sheet product and said aluminium brazing sheet product comprises: said core sheet made of said aluminium alloy having on at least one surface of said core sheet clad said aluminium alloy clad layer, said aluminium alloy clad layer being made of said aluminium alloy comprising silicon in an amount in the range of 2 to 18% by weight, said layer comprising nickel on the outer surface of said aluminium alloy clad layer, and a separately deposited metal layer on one side of said layer comprising nickel, wherein said separately deposited metal layer comprises a metal such that taken together said aluminium alloy clad layer and all layers of the aluminium brazing sheet product exterior thereto form a metal filler having a liquidus temperature in the range of 490 to 570° C. 15. A composite metal panel according to claim 14, wherein said layer comprises copper or copper-based alloy. 16. A composite metal panel according to claim 15, wherein said layer comprises at least 60% by weight copper. 17. A composite metal panel according to claim 14, wherein said layer has a thickness of not more than 10 micron. 18. A composite metal panel according to claim 1, wherein at least one of the parallel metal members is made from a metal selected from the group consisting of aluminium, aluminium alloy, titanium, plated or coated titanium, bronze, brass, stainless steel, plated or coated stainless steel, low-carbon steel, plated or coated low-carbon steel, high-strength steel, and plated or coated high-strength steel, nickel or nickel alloy. 19. A composite metal panel according to claim 1, wherein the parallel metal members have been secured or joined to the aluminium stiffener sheet by brazing. 20. A composite metal panel according to claim 1, wherein said layer comprising nickel has a thickness of not more than 1.0 micron. 21. A composite panel according to claim 11, wherein said bonding layer has a thickness of not more than 0.5 micron. 22. A composite metal panel according to claim 1, wherein both sides of said core sheet are respectively clad by the aluminium alloy clad layer and the layer comprising nickel on the outer surface of said aluminium alloy clad layer. 23. A composite metal panel according to claim 1, wherein the aluminium alloy of the aluminium alloy clad layer comprises silicon in an amount in the range of 5 to 14% by weight. 24. A composite metal panel according to claim 2, wherein both sides of said core sheet are respectively clad by the aluminium alloy clad layer and the layer comprising nickel on the outer surface of said aluminium alloy clad layer. 25. A composite metal panel according to claim 2, wherein the aluminium alloy of the aluminium alloy clad layer comprises silicon in an amount in the range of 5 to 14% by weight. 26. A composite metal panel according to claim 14, wherein both sides of said core sheet are respectively clad by the aluminium alloy clad layer and the layer comprising nickel on the outer surface of said aluminium alloy clad layer. 27. A composite metal panel according to claim 14, wherein the aluminium alloy of the aluminium alloy clad layer comprises silicon in an amount in the range of 5 to 14% by weight. 28. A composite metal panel according to claim 14, wherein said separately deposited metal layer comprises a metal such that taken together said aluminium alloy clad layer and all layers of the aluminium brazing sheet product exterior thereto form a metal filler having a liquidus temperature in the range of 510 to 550° C. 29. A composite metal panel according to claim 1, wherein the parallel metal members have been secured or joined to the aluminium