Corrosion Inhibition Effect of Allium Cepa Extracts on Mild Steel in HCl
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Abstract
Description
A study of the effect of allium cepa extract as an inhibitor on mild steel corrosion in 0.5M HCl was made at ambient
temperature. The experiments were performed with the weight loss/corrosion rate and potentiostatic polarization
measurement techniques. Polarization measurement was performed using a potentiostat (Autolab PGSTAT 30 ECO
CHIMIE) interfaced with a computer for data acquisition and analysis. Effective corrosion inhibition of the extract
on the steel test specimens in the different concentrations of HCl used was achieved as indicated with the results
obtained. There was increasing inhibition performance with increasing concentration of the extract inhibitor. The
best inhibition performances were achieved at the lower exposure times for all the extract concentrations used in the
0.5 M HCl. A good correlation of results was obtained for the gravimetric and polarization experiments. A mixed
type inhibitor is indicated with the results of ba and bc.
Keywords
TJ Mechanical engineering and machinery, TP Chemical technology