摘要:
The present invention provides a separator for a solid polymer type fuel cell superior in low contact resistance of the fuel cell separator surface with carbon paper and flatness and a method of production of the same, that is, a separator for a solid polymer type fuel cell comprising a substrate of stainless steel or titanium or a titanium alloy having a surface layer part on which conductive compound particles are fixed, wherein said conductive compound particles are comprised of one or more types of metal borides, metal carbides, and metal nitrides with an average particle size of 0.01 to 20 µm, said conductive compound particles are present in a region from said substrate surface to a depth of 10 µm, and a distribution of concentration of the metal element forming the conductive compound in said region satisfies relations between a concentration C of the metal element forming the conductive compound and a depth x from the substrate surface shown by equation (C = A·exp(-x/t)+B) and equation (10≤A≤90, -4.0≤B≤1.0, 0.5≤t≤4.0).
摘要:
Zn alloy particles for high corrosion resistance rust prevention paint containing, by mass%, Mg: 0.01 to 30% and having a balance of Zn and unavoidable impurities, having physical fracture facets and/or cracks of a length of 0.01 µm or more or cracks of a depth of 0.01 µm or more, having an average particle size of 0.05 to 200 µm, and having an aspect ratio of maximum size and minimum size (maximum size/minimum size) of an average value of 1 to 1.5. Also, a high corrosion resistance rust prevention paint containing these Zn alloy particles and a high corrosion resistance steel material and steel structure coated with that paint.
摘要:
A highly corrosion-resistant, rust-prevention coating material comprising: an inorganic binder; and Zn metal particles comprising Zn and unavoidable impurities and dispersed in the binder at the rate of 30 mass% or greater based on a dry coating film, wherein (i) the Zn metal particles include (i-1) fine-grain Zn metal particles of 0.05 to 5 µm peak grain diameter whose grain-diameter distribution has a grain-diameter frequency distribution with a single peak and a tail on either side of the peak and (i-2) coarse-grain Zn metal particles of 6 to 100 µm peak grain diameter whose grain-diameter distribution has a grain-diameter frequency distribution with another single peak and a tail on either side of the peak, and wherein (ii) the percentage of all Zn metal particles accounted for by Zn metal particles of 0.05 to 5 µm grain diameter expressed in volume percentage is 5 to 99%.
摘要:
A manufacturing method of a material, including: a first process of placing a blast transfer material on a surface of a base material, and a second process of blasting to the surface of the base material through the blast transfer material, wherein the blast transfer material is nonuniform in one or more of density, thickness, and hardness.
摘要:
The provision of beautiful colored titanium which is excellent in adhesion of the pure titanium or a titanium alloy with the base material, is excellent in photocatalytic activity, and further is excellent in design properties and a method of production of the same which is excellent in productivity and uses an anodic oxidation process is made the object. A titanium-based material having visible light response and excellent in photocatalytic activity characterized in that the material has pure titanium or titanium alloy as a base material, a thickness of a titanium oxide layer which is present on its surface is 0.1 µm to 5.0 µm in range, said titanium oxide layer contains anatase-type titanium dioxide and titanium bonded with hydroxy groups, and further said titanium oxide layer contains nitrogen and carbon respectively in 0.5 to 30 mass%.
摘要:
The present invention provides a polymer electrolyte fuel cell separator made of pure titanium or a titanium alloy superior in contact resistance with carbon paper and a method of production of the same, that is, a separator having a surface layer part to which conductive compound particles are affixed, characterized in that the surface oxide has a thickness of 3 to 15 nm in range, an average carbon concentration in a range from an outermost surface, including the oxide layer, to a depth of 100 nm is 0.02 to 6 at%, and the conductive compound particles have an average particle size of 0.01 to 20 µm. Further, the method of production of the present invention is characterized by forming, blast treating a surface of the formed article by particles comprised of conductive compound particles of an average particle size of 0.01 to 20 µm covering a surface of superhard core particles, impregnating it by a nitric acid aqueous solution of a concentration of 15 to 71 mass% and a temperature of 40 to 100°C for 30 seconds to 180 minutes by spraying or dipping, then washing it.
摘要:
This invention provides a separator for a solid polymer fuel cell in which the surface of the fuel cell separator has low resistance of contact with carbon paper and has excellent flatness, and a method for manufacturing the same. The separator for a solid polymer fuel cell comprises a base material of stainless steel or titanium or titanium alloy having a surface layer part with electroconductive compound particles fixed thereonto. The electroconductive compound particles are formed of one or at least two materials selected from metal borides, metal carbides, and metal nitrides, having an average particle diameter of 0.01 to 20 µm. The electroconductive compound particles are present in a region extended from the base material surface to a depth of 10 µm from the surface. In the region, the concentration distribution of the metal element constituting the electroconductive compound satisfies the requirement that the following relationship between the concentration C of the metal element constituting the electroconductive compound and the depth x from the base material surface is satisfied: formula (C = A ⋅ exp(-x/t) + B) and formula (10 ≤ A ≤ 90, -4.0 ≤ B ≤ 1.0 and 0.5 ≤ t ≤ 4.0).
摘要:
A titanium material for a solid polymer fuel cell separator having a low contact resistance and a method of production of the same, the titanium material having at its surface a surface layer structure in which particles of a Ti compound containing either C or N are dispersed, the particles of Ti compound being covered by titanium oxide and/or metal Ti, characterized in that , when analyzed from the surface by XPS, a Ti2p spectrum of TiO 2 is detected, further, at a Ti2p spectral energy range of TiO and/or a Ti2p spectral energy range of metal Ti, a Ti maximum detection peak height is at least 3 times the standard deviations of the background at the respective spectral energy ranges, and at a C1s spectral energy range and N1s spectral energy range, a maximum detection peak height is less than 3 times the standard deviations of the background at the respective spectral energy ranges of C1s and N1s, are provided.