Sumac (Rhus) Extract as Green Inhibitor for Steel in Seawater

Authors

  • Rana Afif Anaee  Department of Materials Engineering, University of Technology, Baghdad, Iraq
  • Hiba Anwer Abdulahh  Department of Materials Engineering, University of Technology, Baghdad, Iraq
  • Mohammed Ali Tareq  Department of Materials Engineering, University of Technology, Baghdad, Iraq

Keywords:

Sumac extract; green inhibitor; carbon steel; seawater.

Abstract

Sumac extract was tested as green inhibitor for steel in seawater (3.5wt.% NaCl) at room temperature with five concentrations include 4, 6, 8, 12 and 16 mL/L. Corrosion tests were investigated by Potentiostat at 5 mV.sec-1 scan rate, and the data measured by Tafel extrapolation method such as corrosion potential, corrosion current density and Tafel slopes. Inhibition efficiencies were calculated and indicated that 8 mL/L was the best concentration for inhibition. Sumac extract was anodic inhibitor type and obeys Langmuir adsorption isotherm with R2 equal to 0.992. The equilibrium constant of the adsorption-desorption process and the apparent free energy of adsorption also calculated which were 0.66313 and - 8.7370 kJ.mol-1 respectively. FTIR spectroscopy was used to test film formed on steel surface compared with FTIR spectrum of Sumac powder. This test showed the decreasing in intensities of main peaks due to formation Fe2+ organic molecules complexes at functionally groups.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2016-02-25

Issue

Volume 2, Issue 1, January-February-2016

Section

Research Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
Rana Afif Anaee, Hiba Anwer Abdulahh, Mohammed Ali Tareq, " Sumac (Rhus) Extract as Green Inhibitor for Steel in Seawater, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 2, Issue 1, pp.353-358, January-February-2016.