Electrodeposited film having sliding function and coated article therewith

Abstract

The present invention is an electrodeposited film substantially containing no lead, characterized by applying an alloy layer or a simple metal layer with an Hv value of not less than 60 to an under layer, and an alloy layer or a simple metal layer with an Hv value of not more than 40 to an upper layer. This electrodeposited film is harmless to the human body and the environment, and superior in sliding properties.

1 - 10 . (canceled) 
   
   
       11 . A process for preparing a sliding part, comprising:
 coating a surface of a base material by electroplating the surface of the base material with an under layer selected from the group consisting of   
     (a) a silver layer, 
     (b) an alloy layer of silver and antimony, 
     (c) an alloy layer of copper and tin or zinc, 
     (d) a ternary alloy layer of copper, tin and zinc, and 
     (e) an alloy layer of zinc and copper, and
 subsequently coating a surface of the under layer by electroplating the surface of the under layer with an upper layer selected from the group consisting of 
 
     (f) a tin layer, 
     (g) an alloy layer of tin and copper and/or silver, 
     (h) an indium layer, and 
     (i) an alloy layer of indium and silver. 
   
   
       12 . The process for preparing a sliding part according to  claim 11 , wherein the under layer has an Hv value of not less than 60 and the upper layer has an Hv value of not more than 40. 
   
   
       13 . The process for preparing a sliding part according to  claim 11 , wherein the under layer has a thickness of 1 to 1,000 μm and the upper layer has a thickness of 1 to 200 μm. 
   
   
       14 . The process for preparing a sliding part according to  claim 11 , wherein the base material is a member selected from the group consisting of steel, stainless steel, aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy and ceramic.