Assessment of tribological,corrosion,and mechanical analysis of Al-Si/coconut shell ash composites under lubrication conditions

The composite material properties were largely dependent on the processing methods and the parameters employed during their manufacturing. In this study, Al-Si/Coconut Shell Ash (CSA) metal matrix composites were produced using the stir cast method. The potentiodynamic polarization method was utilized to assess the electrochemical behavior of the composites in a 3.5% NaCl solution. The corrosion current density (I _corr ) and corrosion potential (E _corr ) were measured, indicating a trend of heightened corrosion susceptibility with increased CSA concentration. The rise in corrosion rate is ascribed to microstructural alterations and galvanic interactions between the matrix and CSA particles. Tribological tests were conducted on a pin-on-disc tester with a load ranging from 30 and 50 N, and moving speed up to 3 m/s utilizing two distinct lubricants, SAE20W-40 and Rice brain Oil. This research looks at the effects of three distinct CSA weight percentages that is, 5%, 10%, and 15%. As the weight % of CSA increased, composite density fell and mechanical characteristics improved. It has been observed that the 10% CSA composite surface has a small amount of plowing and cracks from light abrasion wear, and the asperities have a small amount of plastic deformation. SEM pictures are acquired to reinforce the wear and friction characteristics that are identified through a comparison of dry and lubricated situations. When compared to dry circumstances, lubricated ones result in a significant reduction in the amount of wear and friction.