METHOD FOR MANUFACTURING CORROSION RESISTANT AND CONDUCTIVE NANO CARBON COATING AND FUEL CELL BIPOLAR PLATE THEREBY

• Main Authors: YOO, JAI MOO, YEO, KI HO, SHIN, EUI CHUL, JUN, YOUNG HA
• Format: Patent
• Language: English; Korean
• Published: 31.07.2014
• Subjects: APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; 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; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; 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; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The present invention etches an oxide film formed on the surface of a stainless steel material by plasma etching to activate the surface layer and prevent a problem of decreasing conductivity thereof. Also the present invention coats the etched surface of the oxide film with metal nitride, such as CrN or TiN, to a nanoscale thickness and then coats the metal nitride to a nanoscale thickness to form a coating layer having high conductivity and corrosion resistance with high productivity. Therefore, it is possible to mass-produce a fuel cell bipolar plate, an electrode material, and a stainless steel material with improved conductivity and corrosion resistance.