The anti-corrosive properties effect of zinc metal is 1N hydrochloric acid has been evaluated at room temperature by using conventional mass loss method. The corrosion rate and inhibition efficiency has been determined from mass loss method. The results of mass-loss show that 93.45% IE, in controlling the corrosion of zinc metal contains 1N HCl and 10% of Datura stramonium plant leaves as corrosion inhibitor. This is owing to at the higher concentration of inhibitor solution which prevents the active site of a zinc metal and a protective film is formed over the zinc metal surface. The rate of corrosion is decreased with increasing addition of additive such as green inhibitor, probably due to progressive adsorption of the phytochemical constituents present in the plant leaves on the zinc metal surface. Electrochemical studies have been used to observe the mechanistic aspects of corrosion and formation of protective film over the zinc metal surface. It is also recognized by surface analysis technique like FTIR and scanning electron microscopy. Smoothness and roughness of zinc metal surface has been observed and compared to blank and inhibitor system by SEM. The AFM microscopes confirm the roughness of zinc metal surface when compared to polished, blank and inhibitor system