Abstract
Using Nishihara's wear testing machine, the wear resistance of the Cr deposit was measured changing the combination of various metals.
1) When Cr was combined with bronze, Cr surface became coarse, which might be accounted for the fact that bronze particles, floating in the used lubricant oil, were melted owing to the frictional heat and penetrated to the Cr deposit.
2) In the case of Cr deposit against carbon steel, the latter was covered with thick Fe3O4 layer and reddish brown iron oxide adhered to the former without lubricant. By employing oil as lubricant, pitting wear of fatigue was observed on the carbon steel.
3) In the case of Cr against cast iron, wear loss of the cast iron was large, and graphite adhered to Cr without lubricant. Wear loss of the Cr deposit of low hardness plated under certain condition or treated at certain temperature was small with lubricant oil.
