Degradation Evaluation of Zinc m 2 M Hydrochloric Acid m the Presence of Bambusa bambos
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Science Alert
Abstract
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Failure evaluation of zinc sample in 2 M hydrochloric acid solution in the presence of
Bambusa bambos extract was conducted using the gasometric method. Zinc coupons, each
measuring 2.5 by 1.5 em were completely immersed in uninhibited and inhibited test solutions
containing extract quantities of 60, 100 140 and 180 mL at a temperature of 298 K for 20 minutes.
The volumes of hydrogen gas data obtained during the experiment were documented and analyzed.
Results showed that maximum inhibitor efficiency and lowest corrosion rate were obtained at
extract quantities of 140 and 100 mL, respectively while corrosion rate reduction did not follow any
particular trend. Frumkin isotherm best explained the extract-metal surface interaction adsorption
mechanism. Once quantity of the extract is known, an expression for estimating corrosion rate
values was also obtained. In addition, the surface analysis indicated that the rate of deterioration
of the metal reduced as extract quantity increased to some extent and changed thereafter.
Keywords
T Technology (General), TJ Mechanical engineering and machinery