Novel Green Corrosion Protection for Mild Steel on Optimal Temperature and Pressure

The green novel catalyst 1-[(4-nitrophenyl) methyl]-4-(pyridin-2-yl)piperazine (NMPP) polymer composite was synthesized by condensation polymerization. The polymer composite was characterized by Fourier transform infrared (FTIR), and high resolution scanning electron microscope (HR-SEM). The inhibition action of the polymer composite was investigated by conventional weight loss method, and electrochemical impedance spectroscopy (EIS). The maximum corrosion inhibition efficiency of 88.34% was obtained at concentration level of 6% at 303 K. The results revealed NMPP as a mixed type corrosion inhibitor, the thermodynamic and kinetic parameters also revealed adsorption of catalyst on to mild surface as exothermic and the adsorption was confirmed by conventional weight loss method. The morphology of mild steel coupons was investigated by HR-SEM. The HR-SEM results showed novel catalyst to have inhibited corrosion on mild steel in 1 M HCL on CO2 environment.