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  • Chem Sci Trans., 2018, 7(2),  pp 163-180  

    DOI:10.7598/cst2018.1466

    Research Article

    Adsorption and Corrosion Inhibition of Cassia Angustifolia (Senna) Fruit Extract on Mild Steel in Hydrochloric Acid Solution

  • A.S. FOUDA*1, R. M. ABOU SHAHBA2, A. E. EL-SHENAWY2 and TAGHREED J. A. SEYAM3
  • 1Department of Chemistry, Faculty of Science, El-Mansoura University, El-Mansoura-35516, Egypt
    2Department of Chemistry, Faculty of Science (Girls branch), Al-Azhar University, Cairo, Egypt
    3Ministry of Education and Higher Education, Gaza, Palestine
  • Abstract

    Cassia Angustifolia (Senna) fruit extract as a corrosion inhibitor in 1 M HCl was investigated by using weight-loss (WL) method and electrochemical techniques. The effect of temperature on the corrosion inhibition of mild steel (MS) in the temperature range of 298-318 K was studied. Temperature studies indicated a decrease in inhibition efficiency (IE) with rise in temperature. The adsorption of Senna extract was found obey Langmuir adsorption isotherm. Polarization data revealed that this extract acts as mixed kind inhibitor. Surface analysis confirmed the formation of protective layer on MS surface. Results from various studies showed that Senna extract is an effective corrosion inhibitor for MS in 1 M HCl.

    Keywords

    Cassia Angustifolia extract, MS, Corrosion inhibition, HCl, Adsorption

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