Corrosion inhibition of carbon steel in aqueous 1 M H₂SO₄ was examined in the absence and presence of (Punica granatum) plant extract as a green corrosion inhibitor with potentiodynamic polarization (PP), electrochemical frequency modulation (EFM), electrochemical impedance spectroscopy (EIS) and mass loss techniques. The effect of temperature and inhibitor concentration was calculated using mass loss method. The data gained indicated that the plant extract solution could serve as an effective inhibitor for steel corrosion in sulphuric acid media. With increasing plant extract concentration, the inhibition activity was found to increase. As temperature and concentration increase higher inhibition activity was obtained 91.7% for Punica granatum at higher level of inhibitor concentration and temperature. Measurements of PP have shown that this extract is of mixed type and chemically adsorbed on carbon steel surface following Temkin isotherm. The film formed on the metal surface has been analyzed by Fourier transforms spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses.  The statistics from various tests seem to agree.