MANUFACTURING METHOD OF SEPARATOR FOR FUEL CELL, FUEL CELL STACK, FUEL CELL VEHICLE, AND SEPARATOR FOR FUEL CELL

• Main Authors: CHIBA HIROTAKA, KANO MAKOTO, UCHIYAMA NORIKO
• Format: Patent
• Language: English
• Published: 22.06.2006
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRICITY; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PROBLEM TO BE SOLVED: To provide a low cost separator for a fuel cell which has low contact resistance generated between the separator and an electrode, and excellent corrosion resistance, and to provide a fuel cell stack and a fuel cell vehicle carrying it. SOLUTION: The separator for the fuel cell is formed with a base layer 13 formed of a substrate of stainless steel on which surface a passage 12 of a fuel or an oxidizing agent is formed and a nitriding layer 14 having a cubic crystal structure 20 formed directly on the base layer 13. COPYRIGHT: (C)2006,JPO&NCIPI