Fermentation product of Streptomyces griseus (albomycin) as a green inhibitor for the corrosion of zinc in H_2SO_4

摘要

Inhibitive and adsorption properties of albomycin as a green inhibitor for the corrosion of zinc in H_2SO_4solutions were studied using weight loss and hydrogen evolution methods. The results obtained, indicate thatalbomycin is a good adsorption inhibitor for the corrosion of zinc in H2SO4 solution. The inhibition potentials ofalbomycin for the corrosion of zinc in H_2SO_4 solutions are attributed to the adsorption of the inhibitor on thesurface of zinc and its inhibition efficiency increases with increase in the concentration of the inhibitor butdecreases with increasing temperature. The range obtained for the values of activation energy and free energy ofadsorption were within the limit expected for the mechanism of physical adsorption. Also, the adsorption ofalbomycin on zinc surface was spontaneous, exothermic, and supported the Langmuir adsorption model.