| 摘要 |
PROBLEM TO BE SOLVED: To provide a silver member having a structure by which the sulfidization resistance is improved while maintaining the original color tone of silver. SOLUTION: A protective film by the plasma polymerization of gaseous hydrocarbons is provided on the surface of a silver member 5, and further a protective layer obtained by laminating a film consisting of the oxide or nitride of at least one kind of element selected from groups IIa, IIIa, IVa, Va, IIb, IIIb and IVb elements and a hard carbon film having the hardness and low friction coefficient corresponding to diamond is furnished thereon.
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