The current work investigates the wear and corrosion behaviour of plasma melting and sand casting LM0 alloy. LM0 alloy was prepared by both plasma melting and sand casting techniques. A comparative study of optical, hardness, density, corrosion, and wear of plasma melting and sand casting alloy samples was carried out. For the corrosion behaviour study, alloy samples are held on Seawater for 2-weeks, and weight loss/gain and corrosion rate in each week was calculated.Pin-on-disc wear testing machine conducted dry sliding wear tests at applied load 10–20 N, with varying sliding velocity 0.94-1.88 m/s for 5 min. Mass loss and wear rate variation with the normal load and sliding velocity were studied in the experiment. It is noticed that finer microstructure in plasma melting and coarse microstructure in sand casting samples were obtained from optical image analysis. Higher hardness and lower density of sand casting sample than plasma melting alloy sample. But sand-casting sample shows higher wear resistance and lower corrosion resistance than the plasma melting sample. The worn surfaces and surface corrosion products morphology was analyzed by SEM analysis to examine the wear and corrosion mechanism. The abrasive wear and pitting corrosion phenomena get from the experimental study.