Chemical Information From GCMS Of Honey And Its Corosion Inhibition Potential For Zinc:- Dike Chinonso. C

ABSTRACT

Samples of honey collected from the Michael Okpara University Honey farm was analysed for some of its chemical constituents using GCMS and the results obtained indicated the presence of diethylene glycol (49.63%), 3- methyoxy - 1, 2 - propanediol (20.97%) and 1 - deoxy - d - arabitol (29.40%). These compounds were found to be rich in hetero atoms and possess suitable functional groups, that meet the conditions needed to be met by a good corrosion inhibitor. Consequently, its corrosion inhibition potential was investigated using weight loss method. Honey was found to be a good adsorption inhibitor for the corrosion of zinc in solution of HC1. The adsorption of the inhibitor supported the mechanism of physical adsorption (because the inhibition efficiency decreases with increase in temperature, values of activation energy and free energy of adsorption were within the range expected for the mechanism of physiosorption) and was best described by Langmuir, Temkin and El Awardy et al. adsorption model. Calculated values of the heat of adsorption indicated that the adsorption of honey on the surface of zinc is thermodynamically spontaneous.