Inhibitive effect of 8-hydroxy Quinoline on the corrosion of mild steel in 1M HCl
Keywords:
Mild Steel, Corrosion, HCl, SEM, EDX.Abstract
The inhibitive action 8-Hydroxy quinoline on corrosion of mild steel in 1 M HCl was investigated by weight loss, open circuit potential (OCP) and potentiodynamic polarization technique. The results showed that the 8-hydroxy Quinoline inhibited mild steel corrosion and inhibition efficiency increased with increase in concentration of inhibitor. The adsorption is spontaneous and followed Langmuir’s adsorption isotherm. Polarization study indicated that the inhibitor acted as mixed-type. The protective film formed on surface is confirmed by scanning electron microscopy (SEM) and energy dispersive analysis by X-ray (EDX).Result obtained from weight loss technique are in good agreement with electrochemical and surface analytical results.
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