PURPOSE: To improve the abrasion resistance of sliding members made of cast iron by dissolving the surfaces of sliding materials made of cast iron with acids to expose graphite layers then sticking the same with metallic plating layers which are outstanding in specific bearing characteristics.

CONSTITUTION: Bearing and sliding members made of cast iron are dipped and left standing in a single acid or mixed acids of nitric acid, sulfuric acid, hydrochloric acid and hydrofluoric acid, or are electrolyzed in these acids, whereby the pearlite and ferrite of the cast iron base on the sliding surfaces are dissolved to expose graphite. After the members are rinsed, the sliding surfaces of the exposed graphite are plated with metals such as Pb, Sn, Cu or the like or alloys of these metals having excellent bearing characteristics to fix the graphite to the cast iron base, whereby the abrasion resistance when the mebers are used as sliding members such as bearings is improved.