The reduction of dissolution of Zinc sheet could be achieved by using SULFASALAZINE as inhibitor in 2M KCl. The computational quantum mechanical analysis for inhibition performance of the compound has been studied using values of EHOMO, ELUMO, ∆E and dipole moment, mass loss, gasometric and electrochemical studies. Potential-Current Curves manifested that the inhibitor follows mixed type of inhibition in industry environment. The adsorption of inhibitor on Zinc sheetsurface obeyed Temkin’s adsorption isotherm. © 2017 University of Manchester and the authors.