Synthesis, Characterization and Corrosion Inhibition of Novel Pyridine on Mild Steel in Hydrochloric Acid Environment

Abstract

Corrosion inhibitions in corrosive solutions of hydrochloric acid for mild steel by chemical compound 3-acetyl-4-(4-bromophenyl)-6-2-oxo-2H-chromen-3-yl pyridine-2(1H)-one (ABCP), was conducted and the chemical structure was elucidated The Nuclear Magnetic Resonance (H-NMR) and Fourier Transform Infrared (FT-IR) spectroscopic techniques. The compound ABCP had been investigated at 25 ˚C via weight loss technique. The outcomes show that the ABCP displays great performances as an inhibitor for mild steel in 0.5 M hydrochloric acid. Inhibition efficiency increments with expanding of concentration and become 98.4% at the highest studied concentration. The studies have demonstrated a reverse association between corrosion rate (CR) and inhibition efficiency (IE percent), as IE increases while CR decreases with an increased concentration. In the presence of ABCP, inhibitory efficiency was up to 98.4% at 25°C in presence of ABCP (0.5 mM). IE drops notably at 65°C with an increased temperature. By means of FT -IR and NMR spectroscopy approaches and physical properties through melting point and Thin Layer Chromatography (TLC), the chemical structure of the tested inhibitor has been clarified.