Adsorption and Corrosion Inhibition of Alkanna Tinctoria Extract (ATE) on Copper in 1 M HNO3 Solution

Abstract: Alkanna Tinctoria Extract (ATE), was investigated as a green corrosion inhibitor for copper in 1 M HNO3 solution using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. The effect of the temperature on corrosion behavior with addition of different concentrations was studied in the temperature range of 25-40 ºC by weight loss method. Polarization curves reveal that the investigated extract is a mixed type inhibitor. The inhibition efficiency was found to increase with increase in the investigated extract concentration and decrease with increase in solution temperature. The adsorption of the inhibitor on copper surface was found to obey the Langmuir’s adsorption isotherm. The results obtained from chemical and electrochemical techniques are in good agreement.

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[A.M.Eldesoky, A.S. Fouda, G.E.Bekheit and N.S.Elsheikh (2015); Adsorption and Corrosion Inhibition of Alkanna Tinctoria Extract (ATE) on Copper in 1 M HNO3 Solution Int. J. of Adv. Res. 3 (2). 0] (ISSN 2320-5407). www.journalijar.com

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