Services on Demand
Journal
Article
Indicators
- Cited by SciELO
- Access statistics
Related links
- Similars in SciELO
Share
Portugaliae Electrochimica Acta
Print version ISSN 0872-1904
Abstract
EDDY, N.O.; ODOEMELAM, S.A.; OGOKO, E.C. and ITA, B.I.. Inhibition of the Corrosion of Zinc in 0.01 - 0.04 M H2SO4 by Erythromycin. Port. Electrochim. Acta [online]. 2010, vol.28, n.1, pp.15-26. ISSN 0872-1904.
Inhibition of the corrosion of zinc in 0.01 to 0.0 4 M H2SO4 by erythromycin was studied using weight loss and hydrogen evolution methods. The results obtained indicate that erythromycin is a good adsorption inhibitor for the corrosion of zinc in H2SO4 solutions. The inhibition efficiency of erythromycin increases with increasing concentration but decreases with increase in temperature. Thermodynamic and adsorption studies reveal that the adsorption of erythromycin on zinc surface is exothermic, spontaneous and is characterised with increasing degree of orderliness. The adsorption characteristics of the inhibitor are best described by the Langmuir adsorption model. From the variation of inhibition efficiency with temperature and the calculated values of the activation and free energies (which are within the limits expected for physical adsorption), we propose that the adsorption of erythromycin on zinc surface is consistent with the mechanism of physical adsorption.
Keywords : corrosion inhibition; Zn, H2SO4; erythromycin.