Abstract: In this work, ethyl phenyl sulphide was evaluated as a corrosion inhibitor for zinc in 0.5N H2SO4 by weight loss, gasometric and therometric methods. Results obtained reveals the fact that ethyl phenyl sulphide exhibited high inhibition efficiencies. The inhibition efficiency increased with increase in the inhibitor concentration. The adsorption of the inhibitor molecules on to the zinc metal surface obeyed Temkin adsorption isotherm.