화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.25, 295-303, May, 2015
DOI10.1016/j.jiec.2014.11.007  Export Citation
Investigation of indole-3-carboxylic acid as steel inhibitor in 0.1 M H2SO4 solution
Jianhong Tan, Lei Guo1, and Shenying Xu2, †
  • School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, PR China
  • 1School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China
  • 2School of Chemistry and Chemical Engineering, Yibin University, Yinbin 644000, PR China, Korea
E-mail:
Corrosion inhibition of indole-3-carboxylic acid (ICA) on mild steel in 0.1 M H2SO4 solution has been studied through weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscope (SEM) experiments. Plots from polarization and EIS techniques show ICA acts as a mixed type inhibitor and its high inhibition effectiveness is assumed to occur via the adsorption of the inhibitor molecules on steel surface. It is then found that this adsorption behavior obeys the Langmuir adsorption isotherm. Theoretical techniques incorporating molecular mechanics and molecular dynamics were used to simulate the adsorption of ICA molecule on Fe(1 1 0) surface.
Keywords:EIS;Polarization;Corrosion inhibition;Mild steel;Adsorption;Theoretical calculations
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