Inhibitive and adsorption characteristics of ampiclox, ampicillin, cloxacillin, chloramphenicle and tetracycline on the corrosion of mild steel have been studied using weight loss, gasometric and thermometric methods. The results obtained reveal that various concentrations of ampiclox, ampicillin, cloxacillin, chloramphenicle and tetracycline inhibited the corrosion of mild steel in H2SO4 between the temperature range of 303 - 333K. Values of inhibition efficiencies of these inhibitors (at 303K) were relatively high and ranged from 88.78 to 94.63%, 78.15 to 89.96%, 90.40 to 93.98%, 8.75 to...