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

Authors(3):

Rana Afif Anaee, Hiba Anwer Abdulahh, Mohammed Ali Tareq
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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.

Rana Afif Anaee, Hiba Anwer Abdulahh, Mohammed Ali Tareq

Sumac extract; green inhibitor; carbon steel; seawater.

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Publication Details

Published in : Volume 2 | Issue 1 | January-Febuary - 2016
Date of Publication Print ISSN Online ISSN
2016-02-25 2395-1990 2394-4099
Page(s) Manuscript Number   Publisher
353-358 IJSRSET162188   Technoscience Academy

Cite This Article

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-Febuary-2016.
URL : http://ijsrset.com/IJSRSET162188.php