Experimental and Theoretical Studies on Corrosion Inhibition Performance of Pyridine Derivatives for Mild Steel in Acid Solution

Substituted pyridine derivatives have been synthesized by reacting 3-acetyl-2H-chromen-2-one with suitable aldehydes using ethyl acetoacetate and ammonium acetate to afford 3-acetyl-4-( substituted -phenyl)-6-(2-oxo-2H-chromen-3-yl) pyridin-2(1H)-one (2a-c). TLC has checked the homogeneity of all three synthesized compounds. Their IR, and 1H-NMR, which can reduce mild steel corrosion in 0.5 M hydrochloric acids were investigated using weight loss measurements and surface detection techniques, with scanning electron microscope (SEM) investigations utilized to identify the used surface technique. The inhibition efficiency was more significant than 99.62%. The formation of protective adsorption layers on the steel surface was credited with excellent inhibitor results. To better understand the inhibition process, quantum chemical calculations were used.