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11.
Inhibition of Zinc Corrosion in Hydrochloric Acid by Pyridoxol
Hydrochloride
Umoh Iniofon E.* and A.O.James
Department
of Pure and Industrial Chemistry, University of Port Harcourt, P.M.B.
5323, Port Harcourt
E-mail address:
bidean2002@yahoo.com
Phone Number: 08057314332
Abstract:
The
effect of Pyridoxol hydrochloride (PXO) on the corrosion of zinc
in 0.1M hydrochloric acid solutions has been investigated at 30oC,
40oC, 50oC, 60oC and 80oC
using weight loss measurements. The compound inhibits the
corrosion of zinc in hydrochloric acid to a remarkable extent.
Inhibition was found to increase with increasing inhibitor
concentration and increasing temperature. An optimum inhibition
efficiency of 89.34% was obtained for zinc in the presence of
the inhibitor at the highest temperature of 80oC.The
inhibition is probably due to adsorption of PXO molecules on the
metal surface blocking the active site and the process of
inhibition was attributed to chemisorption.
Keywords: Corrosion; zinc; Inhibition efficiency; chemisorption;
weight loss.
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