Inhibitive,adsorptive and thermodynamic study of hypoxanthine against the corrosion of aluminium and mild steel in sulphuric acid

The corrosion inhibition potentials of hypoxanthine (hyp) on aluminium and mild steel in 0.1 m h2so4 were investigated at 303 and 333 k using gravimetric,electrochemical impedance spectroscopy (eis) and potentiodynamic polarisation techniques. the results obtained,indicated that hyp exhibited efficient inhibition properties for aluminium and mild steel corrosion in the acidic media. results obtained from potentiodynamic polarisation studies showed that hyp acted as a mixed corrosion inhibitor by retarding anodic and cathodic half reactions while those obtained from impedance spectroscopy studies revealed that the inhibition of aluminium and mild steel corrosion occurred via the mechanism of adsorption. synergistic effects in the presence of iodide ions increased the efficiency of hyp only for the corrosion of mild steel in h2so4. adsorption of hyp on the metal surfaces was spontaneous and supported langmuir and temkin adsorption isotherms.