Fermentation product of Streptomyces griseus (albomycin) as a green inhibitor for the corrosion of zinc in H2SO4

摘要

Inhibitive and adsorption properties of albomycin as a green inhibitor for the corrosion of zinc in H2SO4 solutions were studied using weight loss and hydrogen evolution methods. The results obtained, indicate that albomycin is a good adsorption inhibitor for the corrosion of zinc in H2SO4 solution. The inhibition potentials of albomycin for the corrosion of zinc in H2SO4 solutions are attributed to the adsorption of the inhibitor on the surface of zinc and its inhibition efficiency increases with increase in the concentration of the inhibitor but decreases with increasing temperature. The range obtained for the values of activation energy and free energy of adsorption were within the limit expected for the mechanism of physical adsorption. Also, the adsorption of albomycin on zinc surface was spontaneous, exothermic, and supported the Langmuir adsorption model. Optimized structure of 2-[[2-[[5-[acetyl(hydroxy)amino]-2-[[5-[acetyl(hydroxy)amino]-2-[[5-[acetyl(hydroxy)amino]-2-aminopentanoyl]amino...