Corrosion inhibition of mild steel in 0.1 M HCl solution was investigated in the absence and presence of different concentrations of inhibitors. Weight loss measurements and electrochemical studies were used analysed. The results obtained shows that the inhibition was found to increase with increasing concentration of the inhibitor. Weight loss method shows the inhibition efficiency of 87.2% for 0.1MHCl+AA system and 85% for 0.1MHCl+AA+SPT system. Polarization curves revealed that inhibitor acts as cathodic type inhibitor.