| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric contact point material excellent in corrosion resistance and adhesive wear resistance by providing a backing layer or an intermediate layer on a conductive substrate to form a Pd or Pd alloy layer. SOLUTION: A backing layer mainly made of Ni, Co, or their alloys is formed on a conductive substrate, and a surface layer mainly made of a Pd or Pd alloy layer having the thickness of 0.001-0.4μm is formed on the backing layer. An intermediate layer made of Ag, Ru, In, Sn, Sb, Bi, Pb, Zn, or Cd is formed on the conductive substrate, and a surface layer mainly made of a Pd or Pd alloy layer having the thickness of 0.001-0.4μm is formed on the intermediate layer. The intermediate layer made of Ag, Ru, In, Sn, Sb, Bi, Pb, Zn, or Cd is formed on the above mentioned backing layer, and the surface layer mainly made of the Pd or Pd alloy layer having the thickness of 0.001-0.4μm is formed on the intermediate layer.
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