Chinese Journal of Applied Chemistry

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Inhibition Effect of Extractives from Bohea Leaves on Carbon Steel in Hydrochloric Acid Solution

XIE Yan1,2, YIN Junying1, LIU Yuanwei1, YANG Zhongnian1,2*, ZHANG Fengling1   

  1. (1.Department of Chemical Engineering;
    2.Chemical Technology Research Center,Binzhou University,Binzhou 256600,China)
  • Received:2013-07-02 Revised:2013-08-24 Published:2014-04-10 Online:2014-04-10

Abstract: The corrosion inhibition effect of the Bohea leaves exctrative on carbon steel in 1.0 mol/L HCl solution was investigated by using potentiodynamic polarization and electrochemical impedance spectroscopy. The results indicate that the Bohea leaves extractive exhibits good corrosion inhibition effect on carbon steel. The inhibition efficiency increased with increasing concentration of Bohea leaves extractive. The Bohea leaves extractive is a mixed-type inhibitor. The adsorption of the effective corrosion inhibition component of Bohea leaves extractive on the carbon steel surface conforms with Langmuir adsorption isotherm equation, which belongs to monolayer adsorption.

Key words: bohea leaves, hydrochloric acid, corrosion inhibitor, carbon steel

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