Electrolytic Plasma Discharging Treatment of Cast Iron for Friction Reduction

Paper #:
  • 2018-01-0834

Published:
  • 2018-04-03
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Abstract:
Cathodic plasma electrolysis (CPE) is used to modify the surface morphology of cast iron. During the process, cast iron is served as cathode where the reduction of hydrogen occur as well as plasma discharging. Hydrogen bubbles are exploded leaving irregular array of craters on the surface. After polishing, surface roughness and oil retention are measured by profilometer. Pin-on-disc tests are utilized to determine the coefficients of frictions. The surface morphology of the polished and tested surface is studied by SEM. The same tests are also conducted for the cast iron with crosshatched surface. Those two set of results are compared to determine the improvements of CPE and polishing on the effect of friction. The results show that the polishing of CPE treated surface can decrease the roughness and coefficients of frictions dramatically with very decent oil retention. This method has potential to be applied on the bore surface of cast iron cylinder liner of internal combustion engine. By honing the treated bore surface, the friction between piston and cylinder bore is expected to decrease and the efficiency to increase. Keywords: Cathodic plasma electrolysis; Surface Morphology; Tribology
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