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Citation: LIU Fu-Guo, DU Min, ZHANG Jing, QIU Meng. Inhibition Mechanismof Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated with CO₂[J]. Acta Physico-Chimica Sinica, ;2008, 24(01): 138-142. doi: 10.3866/PKU.WHXB20080124 shu

Inhibition Mechanismof Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated with CO₂

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong Province, P. R. China

Received Date: 17 July 2007
Available Online: 30 November 2007

Laboratory investigations (polarization and electrochemical impedance spectroscopy) were performed in order to assess the effectiveness and the inhibition mechanism of new synthesized imidazoline derivative inhibitor to prevent corrosion of steel in saltwater saturated with carbon dioxide. The inhibitor efficiencies and thermodynamic parameters were calculated. The inhibition efficiency increased with the increase in inhibitor concentration, but increased then decreased with temperature. It was seen that the adsorption of imidazoline derivative on steel fitted the Langmuir isothermequation. The electrochemical results have also been supplemented by quantumchemical analysis.
- EIS; Potentiodynamic polarization; Corrosion inhibitor; Langmuir isotherm; Quantum chemistry
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Inhibition Mechanismof Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated with CO2

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通讯作者: 陈斌, bchen63@163.com

Inhibition Mechanismof Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated with CO₂