METAL MATERIAL AND METHOD FOR PRODUCING SAME

• Main Authors: KURAHASHI RYUROU, KAWASAKA KENJI, KAKUDOU SHIGEO, SHIN YOSHIO, FUKUTOME YOSHIHISA
• Format: Patent
• Language: Chinese; English
• Published: 18.09.2020
• 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 provide a metal material itself and a method for producing the same, the metal material having a passive film on the surface thereof to be corrosion-resistant and also having low contactresistance, wherein the metal material includes a metal material preferable for a separator or a current collector plate which is for a fuel cell. [Solution] Conductive particles 3 are embedded in andattached to a metal substrate 1 having a passive film 2 on the surface thereof such that the conductive particles 3 penetrate the passive film 2 in the thickness direction, wherein the surface of themetal substrate is covered with a coating film having conductivity and corrosion resistance. To attach the conductive particles in such a way, the conductive particles 3 are scattered on a certain metal substrate 1, and the passive film 2 is pressed down with a roll, etc., whereby the conductive particles 3 are pushed into the surface of the metal substrate 1. 提供一种金属材料及其制造方法，所述金属材料包括优选作为燃料电池用隔板、该集电板的原料，在表面具有钝化膜且在具有耐蚀性的同时接触