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Venkatesan Hemapriya,Mayakrishnan Prabakaran,Kandasamy Parameswari,Subramaniyan Chitra,김승현,정일민 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.40 No.-
The influence of two benzofused heterocyclic compounds, namely 2-phenylquinazolin-4(3H)-one(PQO)and 2-phenyl-4H-benzo[d]oxazin-4-one(POO) in controlling mild steel corrosion in 1 M H2SO4 solutionwas investigated using gravimetric and electrochemical methods. The experimental results revealedthat both the inhibitors inhibit corrosion and their inhibition efficiency follows the order PQO > POO. Amixed mode of inhibition from polarization and a charge transfer mechanism from impedance study inthe absence and presence of inhibitors were found. The passive film formed on the mild steel surface wascharacterized using SEM-EDX. Quantum chemical parameters derived using DFT performed at B3LYP/6-31G(d, p) level were used to correlate the molecular structure.