The chemical compositions of cigarette butts water extracts mainly are aromatic amines including nicotine and its compounds If oxygen exists, the aromatic amine compounds can be oxidized easily Whether this oxidation would be beneficial in enhancing the corrosion inhibitive effect of the inhibitor is not known In this study, the corrosion inhibitive effect of aerobic and anaerobic cigarette butts water extracts are compared on N80 steel at 90 degrees C in 15% (weight %) hydrochloric acid The chemical compositions of the aerobic and anaerobic cigarette butts water extracts are also contrasted Weight loss, X-ray diffraction, and electrochemical techniques (such as electrochemical noise, impedance, and potentiodynamic polarization) are used to evaluate the corrosion inhibitive effect of aerobic and anaerobic cigarette butts water extracts Results show that the inhibition efficiency of the aerobic cigarette butts water extracts (92 9%) is higher than anaerobic cigarette butts water extracts (84 6%)