K. Vishalakshi, P. Sivakumar, A. Srikanth
Sep 1, 2016
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Journal
IOSR Journal of Applied Chemistry
Abstract
The efficiency of alcoholic extract of Tetrameles Nudiflora (TN) leaves as an environmentally friendly inhibitor for mild steel in 1N HCl solution has been investigated by weight loss method, potentiodynamic polarization measurements and electrochemical impedance spectroscopy techniques. Inhibition efficiency was found to be about 84.26 % at 15 v/v. Polarization curves revealed that TN leaves extract act as mixed type of inhibitor. Organic moieties present in the extract are found responsible for effective performance of the inhibitor which was well supported by FTIR studies. Corrosion current increases and inhibition efficiency decreases with temperature increasing in HCl solutions with and without Tetrameles Nudiflora leaves extract. The surface morphology analysis was confirmed by Scanning Electron Microscopy (SEM). Inhibition efficiencies obtained from electrochemical techniques and weight loss method are in good agreement.