Corrosion Inhibition Effect of Substituted Quinoline and Its Condensation Products on Mild Steel in Acidic Media

Corrosion inhibition of mild steel in 2N HCl medium in presence of newly synthesized organic compounds, 2-chloroquinoline-3-carbaldehyde (FQ), [(1Z)-(2-chloro quinoline-3-yl) methylene)] hydrazone (FQMH), 2-6- Bis- {(2-chloro quinoline- ylmethylene}- amino}-hexanoic acid (FQHA) and (3Z)-4-(2-chloro quinoline-3-yl)-2-(mercapto methyl)but-3-enoic acid (FQBA) were investigated by weight loss and galvanostatic polarisation techniques. Effect of concentration, time of immersion and temperature effect on corrosion inhibition efficiency was evaluated. The inhibiting performances of all the compounds were found to increase with the increase in concentrations.