METALLIC MATERIAL SHOWING ADEQUATE ELECTROCONDUCTIVITY AFTER HAVING BEEN SURFACE-TREATED, SURFACE-TREATED METALLIC MATERIAL HAVING ADEQUATE ELECTROCONDUCTIVITY, AND METHOD FOR MANUFACTURING THEM

摘要

PROBLEM TO BE SOLVED: To provide a metallic material showing adequate electroconductivity after having been surface-treated; a surface-treated metallic material which balances corrosion resistance and fingerprint resistance with electroconductivity; a method for manufacturing them more easily, stably and industrially; and metallic components using the surface-treated metallic material. SOLUTION: The metallic material showing adequate electroconductivity after having a surface treatment film formed thereon has salient parts with a height of 0.5 to 30μm in an amount of 0.1 to 1,200 portions per 1 mm2on the surface, and has such steep salient parts as to satisfy the following relationship: (length of segment AC)/(length of segment BC)≥0.1, where in the vicinity of a boundary between a salient part and a non-salient part, A means one point on the surface of the salient part, B means one point on the surface of a non-salient part, and C means a foot of a perpendicular line dropped from A to a plane which is parallel to the surface of a peripheral metal and contains B. The surface-treated metal having adequate electroconductivity has a film covering the surface of the metallic material. The method for manufacturing them is disclosed, and the metallic components using the surface-treated metal are provided. COPYRIGHT: (C)2005,JPO&NCIPI