STAINLESS STEEL FOR FUEL CELL SEPARATOR HAVING EXCELLENT THROUGH-PLANE ELECTRICAL CONDUCTIVITY AND CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME

This specification discloses a stainless steel for a fuel cell separator with excellent through-plane electrical conductivity and corrosion resistance. Disclosed a stainless steel for a fuel cell separator with excellent through-plane electrical conductivity and corrosion resistance, when the surface of stainless steel containing 15% or more of Cr by weight is measured by X-ray angle-resolved photoelectron spectroscopy using an Al-Kα X-ray source under the condition that the photoelectron take-off angle is 12°, following surface oxide element ratio (1) value may be 0.5 to 5, and following surface oxide element ratio (2) value may be 0.5 or less: Sumofatomicconcentrationsat%ofCrelementsinCroxidesandCrhydroxidesSumofatomicconcentrationsat%ofFeelementsinFeoxidesandFehydroxidesSumofatomicconcentrationat%ofmetalelementinthemetaloxideMOSumofatomicconcentrationat%ofmetalelementsinalloxidesandhydroxideswherein Cr oxides mean Cr3O4, Cr2O3, CrO2 or CrO3 Cr hydroxides mean CrOOH, Cr(OH)2 or Cr(OH)3, and Fe oxides mean FeO, Fe2O3 or Fe3O4, and Fe hydroxides mean FeOOH,wherein the total oxides and hydroxides comprise the Cr oxides, the Cr hydroxides, the Fe oxides, the Fe hydroxides, and metal oxides(MO), and the metal oxides(MO) comprise mixed oxides, and M is Ti, Nb, Mn, Si, V or a combination thereof excluding Cr and Fe, and O means oxygen.