期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 40, 期 -, 页码 106-117出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2016.06.013
关键词
Corrosion; Polarization; Adsorption; AFM; Quantum chemical study
资金
- Basic Science Research Program of the National Research Foundation of Korea (NRF) - Ministry of Science ICT and Future Planning, Korea [2015-A423-0057]
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 solution was investigated using gravimetric and electrochemical methods. The experimental results revealed that both the inhibitors inhibit corrosion and their inhibition efficiency follows the order PQO > POO. A mixed mode of inhibition from polarization and a charge transfer mechanism from impedance study in the absence and presence of inhibitors were found. The passive film formed on the mild steel surface was characterized using SEM-EDX. Quantum chemical parameters derived using DFT performed at B3LYP/6-31G(d, p) level were used to correlate the molecular structure. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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